- Outboard not running on all cylinders. ENGINE INFO: 1993 2.
 - Outboard not running on all cylinders I replaced the rectifier and it fired up. You may use a brush, a scraper, or a similar tool. . Sep 19, 2021 · - Replaced all seals when putting back together, or used high temp RTV when practical. Motor runs as before. might check fuel pumps to see if leaking and dumping extra fuel into crankcase. Your engine has two identical power packs. Seems the thermosensors not changed. Jun 6, 2016 #1 Hi everyone, If the wiring is okay, and the 'trouble' cylinders are getting spark, then you must have some valves hanging up. You might have damaged cylinders, stuck rings due to a buildup of carbons or other major problems. Now it only fires on the top cylinder. I come to find out that it's only running on two cylinders. Soon as I disconnected the 2 or 3, the engine shut down. It does not happen Throttle plate blocked wide open and all of the plugs out of the engine. wimpertjo New member. The other day, I started the engine (no problems), let Then dry and quickly lube the cylinder with outboard oil because oxidation quickly sets in. If this is a two-stroke you're talking about the answer is negative. I have a 2003 Johnson 50HP (J50PLSTD), a couple weeks agomaking headway speed through the no wake zone, throttled up to close to 5K, ranat that speed for maybe 2 minutes and there was a sudden drop in RPMs, and itcontinued rev up and down, while Jul 16, 2017 · Thanks for the help man. If a Mercury 115 2-stroke outboard engine is not running on #4 cylinder, this can indicate several potential issues. Has a buddy suggest the stator power coil is likely shot. He says it drops to only two running cylinders after he revs it up a littlenot four but two. One of the most frustrating problems with the Mercury 50 HP 2-stroke is when the engine behaves as if it’s running out of gas, even though the fuel tank is adequately filled. Degree in Marine Technology. If dry plug check for gas, if multiple carbs try squirting a little gas in each of them while running Dec 22, 2015 · Last night I was able to get my 4378 zephyr to fire up for the first time. I HAVE. Been through carbs three times, and replaced pump, couplings, etc. Hi everyone. Also, perform a leakdown test on the cylinders to see whether leakage is occurring due to wear, stuck or damaged rings. The other week, I encountered a strange problem with a Johnson 70 hp from 1978 (two stroke, 3 cyl. Pulling either of the starboard plugs caused it to stall out. This will make your outboard go forward in reverse! But this is going to be a simple fix, all you need to do is just reverse how the cable is hooked up in the control box. Please help! You need to establish if the engine is dropping 2 or 3 cyls. Jan 3, 2013 · Hello, all. Had a mechanic from local Yamaha agency look at it today, and he seems even more confused than I am. And you are shifting in to forward when you shift into reverse. Top. I will get another set of readings from another compression gauge and report back. I ran it this way all last summer but want to fix before the season starts again. 9 HP 4 STROKE OUTBOARD. If the compression. Mercury 2-stroke outboard motors are highly regarded in the boating world for their reliability, performance, and efficiency. Thread starter smino; Start date Feb 27, 2008; S. Good place to start, Check spark on all cylinders and/or then check the cylinder compression. I thought sure it would be the Power Pack so I replaced the Power Pack and both Coils. Automotive Services. O. We have seen some engines with variation of more than 4 degrees, though. Recent work Davee3 Running cylinders lean on fuel because of plugged carbs will cause piston/cylinder damage, fix the motor if it is not running properly Auto lube should still pull oil? Anyway only run idle speed for a few seconds each start up & at end of trip The symptoms are that it happens when being started, it will accelerate slowly to a plane and run that way for a couple of minutes then it will suddenly kick in on all 6 cylinders and take off. ). Changed the oil. We are going to go ahead and tear it apart and replace all the gaskets, and the cylinder rings, and see where that gets us. Outboard Shifting Hard & Outboard Shifting Problems! Hard outboard shifting is a result of a gear case issue, a stuck shift shaft, a broken shift mechanism, a faulty control cable, or an issue found in the control box at the helm. net Johnson they are not that expensive. e. we knew there would be some bugs to work out upon purchasing the motor and are trying to get the motor dialed in. Can't remeber the numbers. Best . Some power packs also have a S. Cars & Vehicles. Cylinder 2 (left top) and cylinder 3 (right middle) do not normally fire when the motor is in neutral. I placed the water hose adaptor on Looking for Experiences and advice on turning my 1997 Mercury 115 hp outboard from a 2 by 4 running cylinders into a 4 x 4 running cylinders. he didn't have it in the water last year and didn't plan on putting it in this year either so he gave it to me. In checking the continuity of the gray wires leading from the ECM to the ignition coils, I traced the problem to a 2 inch section of the gray wires where there was no continuity. 9 2 stroke is only running on one cylinder the top one, replaced plugs and plug wires, no help, switched All Major Outboards, Sterndrives, Hi-Performance. I just picked up a boat for almost nothing that has been sitting for an unknown amount of time. In the morning, I pulled the start cords (with the spark plugs out) many times to empty the cylinders. Compression tends to get lower drastically when one or two cylinders start to leak for the damaged engine. restart, Motor would not run in neutral. Although the previous owner claimed that it worked fine, it would only fire on 3 cylinders. Could even be a blocked exhaust port. The most likely cause (without looking at the trouble Aug 11, 2012 · It seems that it dont run al cylinders. I'm sure I am not providing all the information needed but hopefully this is a good start and I can get this puppy running smooth by Sunday. Now it only fires on I meant runs on TOP cylinder only, and never on BOTTOM cylinder. my 1987 yamaha 2 stroke 115 hp v4 is only running on cyl numbers 2 and 4 numbers 1 and 3 are not firing. A variation of one or two degrees is fairly common. When running on only two cylinders they are not particularly smooth at idle speeds. CharlieB Vice Admiral. Find outboard not running ads. Seems to be running great in the trashcan. Thread starter wimpertjo; Start date Jun 6, 2016; W. difference on any of the cylinders, stop running the motor and get it fixed. If it has the CD If you did not run the gas out of the carb before traveling, and the motor was on top of the car with spark plugs down, the carb could have I am assuming that valuable vacation days are wasting away without the outboard. Merc 50hp Only Firing On 2 Cylinders. Last night I was able to get my 4378 zephyr to fire up for the first time. I tried trimming out, accelerating, but something definitely seemed to be wrong. if it does run on four cyls out of the water it must be getting spark. ) I swapped the wires that excite the coils with 1 and 2 and the coil for cyl #1 fires fine. Re: 2002 Mercury 90 Runs on Two Cylinders. Compression is 120 on all 3 cylinders. 2004 Yamaha F225 Engine, 900 hours, running rough and not making top RPM. How do I go about checking this to Aug 10, 2009 · "Sounds like it may not be running on all cylinders or the compression is low. It might just run extremely poorly on the half and half mix! He says it drops to only two running cylinders after he revs it up a littlenot four but two. It does not happen everytime it is started. Larry B. Compression check shows Yeah the #2 and # 5 cylinder are not getting spark. FIX:<br One of the first tricks is to see if the engine is running on all cylinders: pull one spark plug wire off at a time (alternatively on fuel injected engines you can unplug the wires going to the fuel injectors). There is a spot along the head gasket where it looks to be possibly leaking compression. Joe I pulled #3 carb and I went in to check the reed valves in #3 incase one was broken. Yamaha wont pay me 8 hours of run time and the customer didn't wish to either and I wasn't going for free. Now I think you need to verify that the engine actually has spark on all cylinders. Hi all! Looking for some help with my diagnosis. I was cruising at about half pace one day when the number 1 cylinder simply stopped firing, instantly. Unfortunately I reversed the polarity on the battery a few days ago and it would not fire at all. Set up a tiny tach and cylinder 2 is showing WOT 4200 RPM, but 1 and 3 are only reaching 2000 RPM at WOT. I. Putting the motor in neutral caused it stop running. I bought Challenger 2000 last fall and did not have a chance to start it until last week. Jason. Stator - Swap the red with the red/white wires and the blue with the blue/white wires - if the spark Guys, I need some help! I have a 1989 Mercury 40 hp 4 cylinders, 2 strokes that run fine for about 10 minutes, then it started losing power but never shuts off. then remove plugs, and them some real good shot of seafoam into the cylinders, replace plugs, let sit 15 minutes. I would do a "leakdown" test on all cylinders. If you’re stuck in a similar situation then let’s go through a few troubleshooting steps for this particular issue. Opposed to not running at all on the bad gas. ) Nov 2, 2003 · Re: How to test if motor is running on all cylinders? hello if you pull a plug wire use a wire puller or it will nail ya. Engine oil is completely clean. Gas and diesel marine mechanic. Plugs gaped to . Tjotta New member. first day we hit the water its only running on one cylinder i had a good look around it but couldn't fix it there and then so took the boat out of the water, day 2 Re: I think my outboard was running on one cylinder Yes you need to verify that you have spark. 9 (44mph2person) 5100rpm Problem I have is it takes 15 to 45 minutes sometimes before I can get the other 2 cylinders to kick in then it's good for rest of the day. Re: 2001 Merc 200 EFI-Need help diagnosing electrical/running issue First you have to make it fail,then test. Runs very smooth when at full throttle but not developing full power (significantly less). After you narrow down the problem to being fuel related for sure, and identify the problem cylinder, you've either got an injector that is faulty or needs cleaning, a wiring issue, or an EMM with 1 of 3 injector driver being bad. The engine runs on 2 top cylinders when below about 2000 rpm and then kits in the two bottom cylinders when runs above about 2000 rpm. Re: 25hp Johnson will not run at full speed I pulled the flywheel today and noticed the wire going from the points to the bottom coil had all the insulation off of it and was touching a clamp. C. And that’s not all as to why you can come across a cylinder low in compression. Thought perhaps it was some sort of 'limp mode' (no alarm, plenty of water from telltale, had only been running 10 mins max) Got back home at about 2700, and obviously running rough. anyone have a link to directions or any tips on how to Re: Motor idles fine but no power The motor is an 1974 Evinrude 70 hp 3 cylinder. Here is the story. I have had the boat+engine for about a month now, and the outboard engine has worked fine (nice sound, no problems starting etc) until now. If the problem moves to the other cylinders, the stator is bad. Jul 2, 2002 · I have had an ongoing problem with my outboard. In fact, I was on the step, but just barely. This is important to keep an engine from running at overly-high revolutions during Well we are back to the beginning where you stated that the engine has compression and spark so that leaves fuel. (I put a timing light on all four to find this out. I have a 2001 LX250TXRZ with 120psi on al cylinders except bottom on port side which is 65psi. US Navy (Ret) Certified Mercury Marine Tech with over a decade of repair experience. Checking the Condition of the Gear Lube. Not a bad idea to drain carb bowls when stored for a spell,however,running the engine dry is not recommended as it starves cylinders of lubrication before stalling. It has good compression. ( After 1800 rpm all 4 cylinders fire). I assume piston needs to be at TDC for the test. Connect a second tank full of brand new fuel. There is Jun 6, 2016 · Sounds reasonable when it throttles up, but she's definitely not running smoothly at idle. Loss of spark at a single cylinder (on a 3 cylinder model) is either a bad sparkplug, sparkplug coil, sparkplug wire, lead from the switchbox to "that" coil or a bad switchbox. Good luck. Sometimes it would start and run fine, but at other times it would run rough or not start. Aug 2, 2020 · F115 (2005), Lost #1 and #3 cylinders. I am almost certain it is not a fuel issue. 4,819 Satisfied Customers. When I first start out on the water it tries to run on all 3 for a second or two then drops back to 2 and stays that way the rest of the day. Sep 7, 2017 · After 2-3 weeks or approx 10 hours of run time, cylinder 1 and 3 plugs are getting wet fouled (black deposits) and engine is losing power. There are many different causes of a hard shifting outboard or other shifting problems. Hi Folks, I am having problems starting my 1995 150-hp Johnson motor and was wondering if I can get some help identifying what the problem could be. But that is not the issue right now, or maybe it is if all the cylinders have a problem and not just 3&4 Did the oil look OK . So that when the engine does start, it won’t be running on dry cylinders and possibly scoring the cylinder walls, or messing up a piston ring. You could restart the motor and repeat, which is how we get back to the dock. There is spark at both. Lost the rpms. The idle switch removes two By chatting and providing I have a 2000 ox66 200 hsp yahmaha outboard hpdi with a slight ticking noise in motor and excessive smoke at idle speed. smino Recruit. Verified spark timing, could not tell you if the fuel to air mixture is right but the setting is the same on all cylinders. Improperly gaped won't hurt anything in the short run. Being somewhat loose shouldn't cause your issues, it'd still run, just not 100% Lastly, not mentioned was any type of compression / leak down test. I found out its not running on the top cylinder. Joined Apr 10 He MUST TEST for adequate spark on ALL cyl's, without, it will never fire and I meant runs on TOP cylinder only, and never on BOTTOM cylinder. It is going to be running smoothly. after a little research, i find out that it is only running on 2 cylinders Ok, me and a friend checked the compression. Bottom cylinder is not firing. No hiccups, back fires, or issues. Whenever your outboard is running on all cylinders, regardless if it’s a 2, 3, 4, 6, or 8 cylinder engine. It then ran perfectly for a while, 20 minutes or so. I took the wires off while it was running. The motor is a 1983 Evinrude 115HP. While it is running on 3 cylinders it runs hotter than when it is running on all 6. I thought it could be a fuel problem so I took off the carbs and cleaned them up. We did find something. Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, -back to different shop which found several cylinders not carrying a load, dirty injectors, running rough like missing cylinders again and has become progressively worse only getting up to 2800 rpms recently Issues like this are caused for a bunch of reasons. 2006 Yamaha 60 'outboard 4 stroke. after 4 hrs of him running it he authorized me to pull the powerhead and remove the crankcase cover. Sep 21, 2024 · I have a 94 4 cylinder 40hp that is not running on bottom to cylinders. I am leaning towards a bad ecu but do not want to believe that. That does seem to be a mystery normally confined to the likes of chainsaws and weed wackers! Hard to think total loss of compression on a twin cylinder, but perhaps a blown crankcase seal or stuck reed valve is a problem. The exhaust guide definitely needed to be replaced as it had a big hole that was Aug 22, 2017 · Lots of great info in this forum which I’ve used to try andsort out my problem but I’m still stuck. And I mean pouring out the hole. As with most Honda's the worst part of it is the paint. Re: 200 HPDI I have a 1999 Johnson 90 hp model J90PLEEB and tried cranking boat today but its not firing on any cylinders, ran good last You will need a peak reading voltmeter to run voltage test. The compression is 121 on all 4 cylinders. think of voltage as water pressure in a pipe. Thanks Pete Customer: Mercury 125 Hp 2 stroke - Not running on all cylinders? Where, how, should I start looking (maybe after fuel and water issues). Johnson 130 not firing on all cylinders ok, thats all very good advice. It sounds like it tops at 4000 rpm instead of 5500 rpm. I did not go back and put the sub battery cable on the Perko common terminal. I have never done a leak down test on a 2 stroke. 2. Is this a power pack issue? I do not have a DVA meter( I have a multimeter only) Compression is 120 across Mercury 115 2 Stroke Not Running on 4 Cylinder. Cylinders 2, 4 and 6 are on the left side when viewing the motor from behind. An inline spark tester shows spark running strong to all 3 cyclinders. I installed a new power pack(guy at marina said thats what i needed) and still no fire on #2. If I move this lever many times the lower cylinder will catch but stop very quickly. That would cause a no spark situation on both cylinders. I installed new trigger and stator and still no 1993 Evinrude, 70HP VE70TLETS - Bottom cylinder not firing - Coil is good, moved it to the other cylinder to test and it does not fire. - I tested the cylinders again. 11,383 Satisfied Customers. I pulled the boat out to get it ready to take fishing for the first time in about 9 months. i drained the fuel by idle( i relized 1st tank was not empty ) reconected fuel hose primed and took off on all 3 cylinders after 20 Jun 4, 2019 · 4 Cylinder Mercury Carbuerator Outboard running on only 2 cylinders. Compression is 95 on all 6 cylinders. There is a cylindrical part on the side of the crankcase with a small orange leaver. That's how I determined which cylinder wasn't running. Every once in a while it would kick in all of a sudden and start to run right. US Navy (Ret) 1987 115 HP Mercury outboard 2 stroke Cyl 1-3-5 not firing. thanks! Outboard Not Getting Fuel. Looks very clean seems maintained but a compression test gives me around 75 on two of the cylinders with the other two about 105. Only going 30, the cooling system is working ok, and it idles fine, just when trying to cruise it is not getting the speed it should. In the shop they told me that 2 cylinders do not have spark and one does not fire for another reason. It is starting and running, but the engine does not sound like all the cylinders are firing. Drained the float bowl on the carb. Pressure is 40# at the rail, spark is good at all 4. Decarb, take a can of seafoam put 3/4 of it in the gas tank, with only 1 gallon of premixed gas. I am using spark plugs specified in the manual. In my experience, outboards that are running on less than all cylinders run rough and have a noticeable change in sound and vibration. Swap them and see if the problem moves to the other head. Now I have spark on #1 and #2 but 3 is dead. Is your power trim motor screaming away and making weird noises but your boat's outboard motor is barely moving or not moving at all? Always check the easie Hello all, First of all, I know to NEVER use starter fluid in an outboard motor. I'AM LOOKING TO BUY A NEW 9. Take a timing light with you and when it fails check spark on all the cylinders as it sounds like its dropping a bank of cylinders. All Major Outboards, Sterndrives, Hi-Performance. 5L Mercury 200 (0D271065) INITIAL PROBLEM: My engine had no spark on all 3 cylinders (1,3,5) on one bank. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Problem 1: Engine Acts as It Runs Out of Gas. If you have two cylinders not firing (either #1 and #2, or #3 and #4), switch the stator leads end to end on the switch box (swap Red with Red/White) and (swap Blue with Blue/White). put the rest in a spray bottle. But he's not getting gas to the cylinders for some reason because the spark plugs are not wet and don't even smell like Not getting gas to the cylinders a 1995 Mariner 115 hp outboard Serial Number 0G226705 . Problem is, the motor sounded totally normal. i had been skiing for about 3hrs when i thought i had run out of fuel whith out checking switched tanks it started straight away i gave full throtle but couldn't plane it wasn't firing on all cylinders. Replace oil cylinders and spark FWIW, my 15 hp 4 stroke Yamaha spent a night underwater in the Bahamas about 6 years ago, when it was 2 years old. Have change al sparkpuggs and new fuelfilter before i but the boat in the water. Just backing out 2 turns did not seem scientific enough to me, so I'm very grateful to understand how the needle valve affects a running motor. hello. On Saturday, I took the boat out and when I went to start it, once I dropped it on the water, it wouldn't start, the It had been running perfectly but suddenly it started running on only the upper cylinder. Thread starter Tjotta; Start date Jun 4, 2019; T. Eliminate all the "cheaper" things first before you replace the switchbox (which is proven "bad" by proving all the other components in the list are "good"). All cylinders were 180 PSI prior to me running any water thru the engine and I checked again and some were higher around the 210-220 range from water being in the cylinders. Coils are firing, has gas to the carb and has commpression. a 2000 Johnson Ocean Runner 90 hp that when I acquired it, it had a erratic miss that wasn't constant and would only run 4200 rpms at A power pack, or ignition module, is the device that controls the timing of ignition functions on all engine cylinders. I switched the #1 and #3 coils and plug wires but #3 is still dead telling me it is not the coil. 16. ok sorry for the long description. From my knowledge this meant that one switch box was bad. I measured the ohms of each coil and they read fine. $5,650 Negotiable. I pray to higher powers that whatever mishap that caused the CDI-collapse, is gone, . I thought it was only running on 2 cylinders because a coil pack was bad. Here are all of the things that you need to know about low compression on an outboard engine, what Two-stroke engines should be somewhere between 100-120 PSI per cylinder. L. If I am reading your words correctly these are the cylinders that are not firing on Oct 5, 2015 · But I was nowhere near my normal speed. View Profile View Forum Posts Private Message Member Join Date Jun 2004 Location Hiram Posts 6,082 #10 05-01-2006, 05:13 AM. Making your outboard go reverse in forward! Or vice versa, if it is “pushing” when it should “pull”. If the leakdown test shows there's more than 15 lbs. Lol. The engine will not run if disconnect battery cables. I did the cylinder drop test and all the cylinder were hitting very well. jimh Posts: 12339 Joined: Fri Oct 09, 2015 4:25 pm Location: Michigan, Lower Peninsula. Perhaps you are referring to the power pack. Then I put the cdi from the bad motor on the good motor. How do I go about checking this to make sure? I have a spark plug tester but it wont work with this motor because of the connectors are the screw on type not the push on. We are expecting 50 degree weather and I'd love to be able to take this out for a test run on the nearby river. then a compression test, all three were right around 120#. sure enough the sealent had failed. It was not getting fire to #2 cylinder. The problem is as follow. The engine sputters or So I posted on here before about my 01 mercury ob 2 stroke 3 cylinder running half speed. Valves too tight will cause misfires, overheating of the valve(not enough "seat time"). I can see a fair bit of carbon on OK just bought a nice little fishing boat and on the back theres a 1976 Johnson 70HP. something changed. Running that 1992 Evinrude 70hp inline 3cyl oil-injected 2-stroke. If it I have a 1990 Johnson 150 GT. I did not check for fuel at cylinders 2 & 3 or if the injectors were firing, there was no noticeable fuel in the exhaust. Cars, Trailers & Excavators Hire; ( can supply a USA made jacking plate to suit a 20inch transom @ extra cost ) Excellent compression 180 psi on all 4 cylinders Warranty included (ter. Not enough to run on one cylinder. Weird I took the cdi off the good motor and put it on the bad motor same cylinders were not getting spark. Below are some of the possible reasons and solutions for this Re: Only running on two cylinders The simple test for a 4 cyl. The same goes for your outboard. Aug 7, 2014 · however the customer said you had to run it about 8 hours to make it leak. So, it would help if you immediately inspected the primer bulb’s Also have all new gas. This is an alternator motor not stator, Here is a rundown, motor runs on 1,3,5 cylinders, I have been trying to diagnose for weeks and weeks and Im lost at this point. Can unplug the #4 injector or the plug wire and get no change in the rough idle, all others stall the engine when unplugged. I have checked spark on the two cylinders that are no running (Cyl 2 and 3) and the spark is good, but when i take out the sparkplugs Jun 9, 2019 · I bought a 70 hp for my 1650 fishhawk. Motor runs fine. I have swapped the plugs around but the fault does not follow the plug. the system can generate a lot of voltage and it will go someplace. Cylinders 2, 4 and 5. So despite the primer bulb test being negative it still seems like you were correct on the Mercury & Mariner Outboards . I have confirmed with a timing light the engine is missing on cylinder 6 but only below about 1500 rpms. I have a 2000 50HP J50PLSSM motor. Cdi could clear up #5 issue but not #2. Changed spark plug, changed coil, moved working coil to cylinder 2, and it's still not firing up a spark. Bass Junkiethanks. Sprayed down the motor with fresh water. Symptoms. I have a 2002 Mercury 25 hp outboard that is only firing on one cylinder. Idles fine. " Reply A rough idle on an outboard is generally caused by a failed spark plug, a clogged or stuck open fuel injector, a clogged or dirty Making the engine not run on all cylinders, which we talk about in this article linked here. you can always use a spark tester set at 7/16 and watch Mar 30, 2015 · 91 85hp yamaha sounds like it is only hitting on 2 cylinders. If I spray some starting fluid (WD-40 etc) into the cylinders and continue to spray directly into the Carb, it will run. Fuel accumulates in the bottom cylinder. Johnson Outboard Motor No Spark Issue: Clean The Battery Connections; If there is no spark in the motor at all then you It’s not in the service manual, but highly recommended, that you index your flywheel for all six cylinders, and use the timing light on EVERY cylinder to verify that each is getting the correct timing. Re: 200 HPDI Re: Should you or shouldn't you run outboard dry. (speed limiting operator warning) function that limits the RPMs the engine is capable of attaining. Re: 1979 85 hp Johnson outboard not firing on all 4 cylinders Not sure just what you meant when you said you swapped out the "coil pack". As all who have experiences with this engine. - Compression tested both cylinders, read 120PSI on both. I have a 2003 Johnson 50HP (J50PLSTD), a couple weeks agomaking headway speed through the no wake zone, throttled up to close to 5K, ranat that speed for maybe 2 minutes and there was a sudden drop in RPMs, and itcontinued rev up and down, while Re: 90 psi compression? this is a simple way to decarb that i use. I changed the water seperator because it is the cheapest fix to start with. They looked fine and I decided to crank the engine to see them operate properly. If the engine runs rougher without that spark plug wire connected - Ask the experts on our Yamaha Outboard Forum for with my 2003 Yamaha 90 HP 4 stroke missing #2 cyl I swapped out coils problem stayed on #2 I used a timing light on all 4 cylinders all are firing except #2 it is I am using a timing light while it is running on each cylinder and you can see 1 and 2 missing 3 and 4 I've got a 40hp two cylinder. 030 . I replaced all the coils and still no fire to #2. the engine will "run" if I keep the key turned all the way (not engaging choke, just engaging the starter). I bought the boat knowing the owner had run the engine a bit hot due to a shredded water pump impeller and changed that out. I test all three and I come to the conclusion that I'm not getting any sort of spark in cylinder 2. This start and die issue was intermittent, and had been around for about a year, i. I exchanged the Mar 11, 2020 · Cylinders 1, 3 and 5 are on the right side when viewing the motor from behind. View All; Fishing Boat You should not run the motor higher than around 1500 RPM with no load on it. Very odd, specially considering the stator is pretty new. Mar 12, 2012 · As this is an MPI engine you will need to have a scan tool or diagnostic software hooked up to read any trouble codes. Oct 5, 2009 · Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Joined Dec 4, 2011 Messages 52. Post by My 1986 9. I put it back on, fired it up, and took the bottom one off. An outboard gas engine actually needs five things to operate correctly. New plugs is good but won't matter if you don't have spark. ADVERTISEMENT. However, like any mechanical device, they can occasionally encounter issues and require troubleshooting. they look like they are extreamly hard to remove. there is no over heating and extra smoke. 40 yrs. I diagnosed a bad timer base and replaced it. Recent compression test, all 4 cylinders at 210psi. Charles. 200 hpdi is not running on all six cylinders. - Spark is good on both cylinders, jumped a 1/2" gap. spark missing on 1 cyl is a box or coil, spark missing on 2 cyls. I'm not getting any sneezes, but it does shudder a bit (but even my '04 BMW oilhead boxer shudders a bit, so I thought this is just a 2-cylinder thing). Losing one cylinder Jul 11, 2011 · Re: Yamaha 115 2-stroke (1999) running on 3 cylinders at low rpm Re: Yamaha 115 2-stroke (1999) running on 3 cylinders at low rpm I am definitly getting strong spark to all cylinders. It seems like it was only running on half of the cylinders though. As you advance the throttle the other two cylinders kick in and BANG, off you go with suddenly double the power. The motor sparks a blue flame across the 7/16" gap on cylinders two and four, but no spark whatsoever on cylinders one and three. Re: Motor Runs On Muffs But Not In The Water I have determined that it must be a fuel problem. My mechanic arrived this morning to start troubleshooting and repair on our Yamaha F90 The first order of business is to perform a compression test of all the cylinders 2006 Yamaha 60 'outboard 4 stroke. This is what you want to having going on Aug 22, 2023 · I have a 2004 Johnson 150hp carbonated outboard. Should all other plugs be left in except adjacent plug and how much air pressure should I use? C4 to ground Runs fair, good spark jump, plug was wet and fowled when pulled C3 to ground Runs like crap, will not jump 7/16, plug was in fair shape when pulled (a bit carbonized, but not wet) C2 to ground Runs fair, Jumps 7/16, plug fowl and wet C1 to ground Runs like crap, will not jump 7/16, plug looks very good So this tells me that the fuel system electrical is not telling the injectors to work on 1 and 4. Tan. Big Jon Honda 5hp Outboard Shop Outboards. Engine was Jul 2, 2002 · Check plugs, if some or one is wet after running then no fire there and check ignition. Low speed running (1200 - 2400rpm) in forward gear is very rough, sounds like its running on 2 cylinders only and I need to throttle up to 75% throttle to clear this and as soon as she hits around 3200 rpm she signs nicely on all 3 cylinders while accelerating at Actually, it's the same results. Here are 9 steps you can take to start an outboard motor that’s been sitting: Remove the airbox and lubricate all components. Jun 6, 2016 · Outboard Motor Parts 454 not running on all cilinders. In this blog post, we’ll explore common problems associated with Mercury 2-stroke outboard engines and provide detailed, Did the new coil come with leads on it. The noticeable symptom is a lack of power. F. Feb 11, 2012 #6 I bought it knowing it would not run. So the one cylinder that you drop that allows the engine to keep running is your problem cylinder. Although no two things ever fail at the same time, spark needs to be blue also as a yellow spark may Re: Yamaha 70 HP top cylinder not firing Checked compression against other cylinders and it was in line. If it runs good for a short period of time, then goes back to bad, it must be fuel related to that cylinder. In this day an age of advanced motors, these Mercury 115-HP motors are a throwback to the stone age of outboards. Checked spark, swapped plugs, etc. Replacing an outboard is an expensive job and task to do it will not run at all. Owner says that that was how it was running before they started taking it apart. the Engine did not run or idle well and eventually would not run at all. i took it out a few times and it started running rough after the 3rd time. This motor has been started at least twice a month since it has been down in November. Coils one and three will spark when attached to cylinder 4's terminal on the powerpack. Mechanic said a float needle had come loose and was starving the carb of gas but i'm not sure if thats exactly what he said. Am running it on the muffs with a clean, portable tank with gas I just bought now, and it idles like crap. i have a mercury 115hp outboard that i got from my father. Starboard ones are very hot to the touch at this point. Looking for the high speed timing on a 50 hp yamaha, The model is a P 50 TLHQ and the cam follower was damaged by fire. June 27, 2019 at 10:02 Seemed like just running on 2 cylinders. that is running on 2 cyl (upper or lower 2) with the black/yellow disconnected. (These motors are famous for stuck exhaust valves. It shocked the crap out of me but kept running. Removed spark plug and pumped fuel out of the bottom cylinder. Check all wire connections are not corroded and are tight and remove the black This issue did not appear until late in the process - no signs of heat damage, and no issue at all cranking the engine on BAT 2 on the Perko switch. Looking for a little more advance direction. No spark. This is a 2+2 motor where the top two cylinders run and the bottom two kick in around 1800 rpm. if you do and I really dont reccomend it, imediatly grond the end against a bolt head. - Adjusted the carburetor throttle linkages (The one that ties both carburetors together). I can put it back on neutral and accelerate and will do fine but as soon I go back in gear, he doesn't have enough power. Are all the plugs wet or just one and four and did you check the risistance of the leads, CLARIFY WHAT YOU MEAN IT RUNS ALL RIGHT OUT OF THE WATER, if it runs on four cyls out of the water pull the engine cowling off and go for a run. Cylinder 1 and 4. start the engine, and let it come up to temperature. I have a 1964 Johnson Super Seahorse 40hp I'm trying to put back on the water. Cylinders 2 and 5 may not fire at low rpm's, if you are getting a 3/4" spark gap then it should run on that cylinder. ENGINE INFO: 1993 2. Carbs need to be gone through. Runs fine on bottom 2 cylinders, top 2 do not fire. Taken to work shop second time to "clean jackets" under cylinder heads. those running the boat when it "overheated" say there was NO rpm-reduction, but that is "wobbly" info (reading: not outboard mechanics). Too much fuel is just like not enough, neither will let cylinder fire properly [The 2002 Mercury 90-HP engine is] now running on all three cylinders and ready to go. If the problem stays on the same cylinders, the switch box is likely bad. Guess what I found, fuel pouring from the notch below the far right reed. However, if you immediately push into gear during starting it would continue to run up to about 2K and stay there. It needs air, fuel, the spark will not ignite in the combustion chamber, and your engine will probably not run at all; although if it is running, If you Hi All, looking for any info the would help me figure this out. Last but not least. Eventually, it would not start at all as a result of no spark. I spliced in a new piece of wire and now have strong spark to both cylinders. I replaced it and I still have the same problem. 5 Lund tyee 4. IMO would not run your engine leaner than 25:1 oil ratio. There was no "chugging" or anything and the engine continued to run. Once you hit a certain speed, it all sparks and runs perfectly. When I took the top one off, it shocked the crap out of me and the motor died. Jun 4, 2019 However it runs just on 2 cylinders. If they are all evenly low squirt a bit of oil in each one, spin the engine over and run the test again to see if the compression comes up appreciably on all cylinders. Pulling either of the port plugs made no difference in RPMs or sound. The accepted norm is to crank it so that it hits on compression on the gauge five times per cylinder. OMC two cylinder engines run remarkably smooth on one cylinder. ussally a trigger. I run 16:1 in my 2 cycle air cooled weed wacker it runs better than the factory recommendation 32:1, better compression, more oil does that. Like- misplaced head gaskets, valve issues, damaged cylinder walls, broken piston rings, etc. Side mount control box. Model: J30ELCUB Serial: E6251752 Plugs and cylinders are totally cold after running the engine for a few minutes. More often than I would think, someone comes in that "Just Bought a Boat" and says that the motor dies when you put it into gear when in the water at the la Yes, an outboard will run for a little while with low compression. Has 2 yr old Honda specific commander hydraulic steering cylinder, can remove if not wanted. Each pack controls the spark to one head. we recently purchased the motor with a rebuilt powerhead. If the wiring is okay, and the 'trouble' cylinders are getting spark, then you must have Are you frustrated with your outboard motor not running at full power, even when you give it all you have got? Well, you are not the only powerboat owner facing this issue, as it is a common problem that can happen due to various reasons. Model# 70473M New Spark plugs and wires. How to diagnose: Inspect the water intake grates, usually located on the lower unit of the outboard or sterndrive engines. Sorry I don't know all the technical terms. Was running it on my v16r where it performed perfectly, 36 knots with 16" ally prop, miles better on every measure than Lots of great info in this forum which I’ve used to try andsort out my problem but I’m still stuck. Check for any debris, mud, seaweed, or marine growth that could obstruct the intake. As is the regulator. The spark should jump a &/16" gap on a spark tester and the compression 100+ psi on all cylinders with no more than 15% difference between cylinders. It starts up great, but seems as though it is not running on all cylinders (at startup) thought each plug Oct 14, 2016 · I went out today and after running for 10 minutes I was not able to go over 3000 rpm. Also tested by pulling the plug wires while running. Likewise, coil 4 will spark when attached to cylinders one and three terminals on the powerpack. It is especially noticeable under load. May 21, 2012 · Re: 2000 Yamaha 100hp Four stroke running on three cylindersI think You need to see if it is dropping spark to a cylinder, an inductive timing light will show that fairly well. Back Boat Seats. After reading that VRO thread though, I got nervous. (as fine as they do) Will start off running with full power for a short while then starts losing power. Today found water in cylinders 1 and 3, top two cylinders on starboard cylinder bank. Things I have tried carbs cleaned with chem-dip and replaced carbs and Wait until it's running bad then take out your known bad plug and squirt a little fuel into the cylinder, replug quickly, and fire her up. Re: 2000 Yamaha 100hp Four stroke running on three cylindersI think My 03 F90 would seem to run fine at wot w 1 cyl dead, but bucked and shook at lower rpm's/idle. In cylinders 1 and 3 the compression is around 65, and 2,4,5, and 6 are 85-95. This should help people in identifying some of the reasons behind the problem as well as understanding how they can avoid the issue. I was running fine when I last used it but I went ahead and drained all of the fuel and replaced with new fuel. In time it will show its effects. I got spark out of # 5 cylinder , but not # . Joined Feb 27, 2008 Upon Furthere Inspection It Is Only Running On The Bottom 2 Cylinders Loads Of Compresssion Loads Of Spark But Not Running On Top Cylinder. What situation could cut out cylinders 2 & 3? I am very impressed that the motor runs so well on 2 cylinders. Oct 16, 2020 · Yamaha Outboard Forum; If this is your first visit, I am misfiring #'s 1,3, and 5 cylinders no spark at all, even in gear. Drain old fuel from the fuel tank. DIAGNOSIS: I swapped the ignition coil leads to the switch boxes and the problem moved to cylinders (2,4,6). Injectors are plugged firmly. Any help would be appreciated! Dec 22, 2015 · Last night I was able to get my 4378 zephyr to fire up for the first time. All the plugs now are sparking. I Aug 17, 2018 · I have a 2002 Mercury 25 hp outboard that is only firing on one cylinder. Replace Primer Bulb; If your primer bulb has not been replaced in a long time, then you’re likely dealing with suction problems. Swapped coils and the problem stays with the #4 cylinder. Yes, I thought that maybe my gauge was not good (harbor freight), because all cylinders measured 70/70/70, and the top 2 cylinders were starting/running well, yet bottom cylinder stayed "cold". Getting good fuel spray pattern on all 4 injectors, replaced the spark plugs and still no fire on #4. Buy and sell almost anything on Gumtree classifieds. 200 hpdi is not firing on two cylinders. I switched plugs, plug wires, and coils and the problem continued on the lower cylinder. I cannot seem to figure out what the heck is going on. Ex. Apr 2, 2006 · Re: Mercury 150- not running on all cylinders. How to fix: You’ll want to clean the water intake grates by removing any debris or growth. Let me 120 on all 4 cylinders. Jan 22, 2008 · 90hp has been great until this weekend gone. FlyboyTR Seaman. This can be establishsd with a spark gap testing is much easier with a DVA but can be done without one. and then shuts of the second I let go of the key. The engine loses power when I try to exceed 3000. Um it wasn't getting any spark when the customer brought it over. Tr21Pd. Nov 25, 2019 · You are correct about the valves. Needle value and float are ok. Looking forward to everyone thoughts. so it looks like the carbs are next. Moreover, when I heard the coughing I thought that it may be water in the gas stalling Mar 5, 2011 · I have a BF50 4 stroke outboard (2006 model) that up until now has been a reliable motor. Topic: Renovating Outboard Motor That Has Not Run for 15-years: speckulizer: posted 11-15-2011 10:13 AM ET (US) Hi guys. Yamaha Outboard Forum; If this is your first visit, I am misfiring #'s 1,3, and 5 cylinders no spark at all, even in gear. W. Running on 3 cylinders. I re-built the fuel pump ($10 or something for kit), I just cleaned the carbs but I agree re-building would be best. It has a weak spark. Regards Boats . ckbbb ecwla duwne hhqkp zacj opkhvi tlg yibyd ruet morqqjg