Johnson v4 compression. Port side top - 70+ / bottom - 80-.

Johnson v4 compression. Joined Jul 26, 2008 Messages 393. 040 gap. Low compression 90 wasn't exactly slow in a 14'/500lb hull back in its day but it seems that these engines can be made to haul, especially considering their 300lb or so weight. The results for the cold (dry) compression test was 110, 103, 105, 80. 15. To have a shop rebuild, $3500. I have good spark, clean fuel, but low compression on one cylinder and that cylinder is not firing. In the end it didn't help my case because I wasn't getting great compression. All the spark plugs are fouled with oil and fuel. Is this adequate compression for this engine? The outboard runs great, I just don't feel I get all of the power out of it I should. Gotta love 2-strokes. Had compression checked and found that the left bank had compression of 86 and 90, the right both had 122 is the motor TOAST?Thanks for any help :confused: :mad: Knowing how to perform a compression test is essential if you are buying or maintaining any outboard motor. Normal cylinder compression should be within 10% of each other. I am thinking of equaling out the cylinders and put in some sea foam, one ounce twice a day and see if that loosens up the rings to get better numbers. Jul 25, 2016 · 14. Mechanic said it is defineately not the ideal situation, but that it Jan 3, 2007 · Re: 115 johnson v4 problems The plugs you need are Champion QL77JC4 and gapped . 85 = 118. No wonder we're talking about so much larger carbs, exhaust tuner, high compression heads and a ~30hp increase at the prop. All 4 cylinders in the 90s with a high of 96 to a low of 90. Jan 24, 2010 · Re: 1968 Johnson 65 hp v4 Compression 110 psi - Good enough? Thanks. Boat ran great for approximately 2 months. Jan 27, 2011. ----Report the May 12, 2012 · Re: Johnson V4 1978 85HP Seahorse Specs? Thanks Joe for your fast response, I am glad I asked, I would of torqued the flywheel to 50 to 60, had no idea it was that high. I can't tell for certain but it appears there is some small pits on both cylinders on this side as well. Compression for all cylinders is around 125PSI. The engine runs great. Jul 25, 2016. I had a 3 cyl 70hp evinrude that ran 40mph in FL. -----Start with a compression test !!-----If that is OK then the next test is to see if spark will jump a gap of 7/16" or more, not just the gap of the plugs laying on the block. 5hp Evinrude that has been sitting for over 10 years. Also while I was running on the muffs, I noticed water leaking from a couple of the bolts on the exhaust cover, I re-torqued them and the leaks stopped, should I be Jul 20, 2009 · Compression should be approximately 100+ psi and even on all cylinders. Typically, a variance of more than that and you could have some issue that should be addressed. Discussion in 'Outboards' started by Shorewood Bob, Apr 20, 2015. Your readings are beyond the norm. I have replaced all electronics on motor (CDIs, rectifier, coils) rebuilt the carbs, new fuel lines, new fuel pump, new prime bulb, and new spark plugs and wires. In stock and ready to ship. I think if you get the carbs cleaned real good that considerably cleaner plug will start looking like the rest of them. Things have been going well except for three broken bolts that I'll take care of later with easy outs and soaking in PB Blaster. Jul 18, 2011 · Re: 115 Johnson 115 Compression Advice Not sure just what you mean by wet compression numbers. I filled oil tank but didn't prime oil bulb. How to do compression test on boat motor. " Aug 4, 2015 · As the title says a buddies V4 Johnson lost compression on the bottom Starboard side cylinder. The Bombardier Engine Tuner comes in an aerosol can with the direct inject hose. Now I done a lot of compression tests and I never seen where a gauge didn't register somethingI can see the piston moving Jun 12, 2021 · Once running it ran fine (about 30mph WOT on a 17' trihull) I had work done about 3 years prior and they said it has good compression at 110psi. I had to change the piston rings, they were really worn. I forgot to get the serial# when i checked it out. Jul 4, 2006 · I have a 1964 Johnson Meteor 90hp V4 model number V4ML-10R. Jul 5, 2011 · Re: 1985 120 Johnson VRO V4 - Compression 139 x 0. Broken/Missing Rings. 032 gap. I've noticed that the tachometer works intermittenly. #1. 85 so you are within 15%. a real SNAP! Dies it? That 1982 90hp Johnson should be using Champion QL77JC4 plugs gapped at either . Feb 10, 2013 · I just tested the compression on a newly acquired 1998 Evinrude 115hp and I'm a little concerned. Ive been in debate about either repowering my 16' stratos that has a '90 Johnson v4 120 looper with an early 2000's model mercury 150 or taking the looper to someone to rebuild and hopefully find some more power. Any answers would be greatly appreciated. Also, cleaned spark plug wires at plug end only as well as the coil end. Offering discount prices on new and remanufactured assemblies for over 50 years. 80-83-82-84. 4) 779 (30. about 1700 hrs now on it will be rebuiding soon. I feel the V4 Crossflows run better with . Don't worry too much about the actual values, the important part is that there isn't any more than 10 to 15 psi difference between the cylinders. I used the Sierra rebuild kits from BoatUS, using the Johnson overhaul manual. 3 Cylinders have 124-125 lbs, one has only 50 (ouch). They pressure checked the VRO pump and said that it is working to spec right now. Thread starter rrw; Start date Apr 7, 2015; rrw Petty Officer 2nd Class. I checked the compression on this motor and i got good compression from 3 cylinders but the last cylinder didn't register on the gauge at all. Aug 4, 2017 · 1983 140hp V4 Johnson compression test Thread starter dfrants; Start date Aug 4, 2017; D. I did the test with the engine cold with no oil. Cylidner walls look good. Thanks. was 110 and the bottom was 105 i was reading in my book that there could be a differents between left and right bank does this sound bad and should i pull head on left bank to check inside ?? Jun 13, 2011 · Re: 1988 Evinrude V4 120hp Wet Test Compression Results Good or Bad? Yes there was oil in the cylinder. The looper has 107-110# compression on all four holes and runs pretty good good and has a brand new lower unit on it but really lacks 4 days ago · They have checked the compression of all 4 cylinders and they came in at 135 psi (+/- 2 psi across all 4). Come to find out, the automotive compression tester I borrowed from auto zone didn't measure properly. I had not looked at the heads. ----That first shows up as stalling at low throttle. dfrants Petty Officer 1st Class. 15 = 139. Trying to bring a '90 Johnson 120HP back to life that's been sitting for 5+ years. Mine is a 1988 90 V4 Evin rude running 110 on the high cyls and 95 on the low. Compression read 60lbs in all cylinders. 032-. Re: 85hp Johnson v4 Compression #'s ? That engine when new probably had close to 125 lbs compression, so your current numbers are just fine. 030 (try both settings). Apr 8, 2013 · I just recently purchased an old fixer upper boat with a 1969 85hp Evinrude V4 and need help on a few areas. The engine does not want to idle, but it will run if given throttle/revved. Oct 14, 2006 · "We are contemplating buying a boat with a 1986 Evinrude V4, 90HP VRO and have a couple of questions. I just did a compression test and the good news is all cylinders tested the same plus or minus about 1 psi. Is a Mar 28, 2010 · Re: evinrude 90 hp v4 runs good then backfires Re: evinrude 90 hp v4 runs good then backfires It actually runs better when it has been run for about 4 to 5 minutes but it still has that occasional backfire or what seems to be a backfire. Higher compression for sure but its the heads that must raise the compression, as pistons rods and blocks are all the same. Took compression readings and they are not that great: the passenger top is 100, passenger bottom is 105 and the two drivers sides are both 110. Apr 4, 2012 · Re: 1989 Evinrude 110 hp just rebuilt. A lot of other people like to run them at . Aug 24, 2014 · Johnson 120 V4 idle issues Jump to Latest 11K views 25 replies 11 participants last post by 22fish Oct 9, 2014 Oct 1, 2008 · JOHNSON V4 115hp. but, it only has 40psi compression. cleaned out both carbs. #8. I checked the bore and piston with a light and the cylinder isn't scored and the piston looks good. Since 1985 (when the V4 loopcharged engines were introduced) these outboards have been commonly called the "crossflow" V4 engines. I was told buy an old boat Apr 29, 2002 · I recently bought a 78 115 johnson V4. Top righ cylinder compression was 100 psi, there is some scoring on the cyliner wall and the piston skirt Bottom Right cylinder compression was 75 psi, the piston top is melted and pretty bad scoring on piston skirt. About 8yrs ago I went through the Compression ratio Spark plug NGK Bore Stroke mm (in) mm (in) POWERHEAD Engine type Maximum output Recommended operating range kW (PS) rpm Transom height mm (in type) mm (in type) 481 (18. I have heard people say that the "Wet" test is the best way to test compression. May 24, 2007 · "Recently did a compression te "Recently did a compression test on my 71 johnson 85 hp. Dec 7, 2017 · Here I come: My engine: Johnson 90HP V4, J90SLEOC ocean runner 60 degrees Compression 120,119,118 and 112. The guy who worked on it said one of the cylinders was getting poor compression, and he looked in sparkplug hole with a mini camera . ----The fact is that many of these motors suffered from broken piston rings. The plugs all fire at cranking speed - good spark at a 7/16" gap. It starts, goes up in RPM at about 1100 and then slowly comes back down until it Johnson 90HP V4 not idling and dies, j90sleoc Feb 22, 2009 · The carbs are different, the exhaust, reeds. Problem appears to be spark, but in trouble shooting to that point, I did check the compression on two of the cylinders. Port side top - 70+ / bottom - 80-. . 85 and 139 - 20. p. 1969-1984 V4 Crossflow Outboards. Mar 21, 2010 · Just bought a 1997 Stratos 250 with a Johnson V4 90 on it, one owner boat, compression was 115-120 on all cylinders, is the generally a reliable engine? Any quirks or problems I need to address? Thanks. Try running some Seafoam cleaner through it and see if they even out a little more. I have rebuilt the carbs and done a full tune up it runs better for sure, but the altitude kills it. During inspection by a potential buyer, we performed a compression test. The motor will be idleing perfect and then it will sometimes die when it backfires. Performed a compression check and the numbers are: 68-69-70-70. Feb 23, 2004 · " I have heard many stories on " I have heard many stories on what the Compression should read on this old 1963 Johnson SS V4 75hp What should it be Before it needs a rebulid? Last summer I was working on it and the comp reads 78 on 3 cylders and 82 on 1. Jun 11, 2003 · Checked compression on a 1960's johnson v4 75 hp outboard. 15 = 20. Are these good numbers? Seems low but I don't know what the correct numbers should be. Seemed low for a 2-stroke, but the shop manual said the actual value didn't matter as much as it Aug 24, 2013 · Aug 24, 2013. Jun 6, 2010 · I have an 86 EVINRUDE 90 HP (4-cylinder) OB that recently had idle problems. Later this year, I may just bite the bullet and buy a new one from Johnson/Evinrude so I won't have any issues later. Jul 29, 2009 · Re: '79 V4 85hp Evinrude Compression spec You may be dropping a cylinder after it warms up. Jul 26, 2005 · Re: 90Hp V4 1990 Evinrude GOOD?? Ahhh, Comeing over to this side eh? Yes, a compression test is always a good idea before buying a second hand motor. Starboard side top - 65 / bottom - 85. Also, it is not unusual for the compression to vary a few lbs from one head to the other, due to the way the blocks were machined at the factory. Spark test was great. The others are 105, 112 and 112. Compression tests: 149 three cylinders, 90 in the lower left cylinder. Thread starter coldoc; Start date Oct 1, What is the compression of all cylinders? the engine model is early 70's 115hp V4. Idleing back to the dock and it started missing. Both read 90-100psi. Joined Oct 9, 2011 Messages 104 Sep 5, 2005 · i have a 90 hp evinrude 1981 v4 2 stroke, the engine was running ok but forgot to mix oil in with petrol was running for an hour ,engine still fires up and idles but not much power when engauged into gear,i have checked the spark and have a good spark on all 4 but there is no compression on Jul 6, 2011 · I have a 1999 Johnson 130 hp V4 2 stroke outboard. I had the carbs rebuilt but had the same result. Feb 26, 2008 · I am looking at a boat with 140hp evirude tha i believe to be about a mid to late 80s v4 its on an 85 boat and the color is silvery with the navy stripe with lettering. I hope this answers your question. Apr 20, 2015 · 1978 Evinrude 115 (115893C) Compression Check. Aug 4 Jul 10, 2006 · Re: cylinder compression for 86 90 h. A OMC V 4 motor has compression new of about 120 psi avg Well worn that will go down to 100 psi avg thats about 1800 hours to do that. Hi Guys,Just a quick video to show the compression on what I believe is a 1995 Evinrude V4 130hp Outboard Motor, looks like all 4 cylinders are about 120+psi Apr 29, 2014 · Re: 1985 Evinrude 115 hp v4 stalls OK so you have a nice " looking " motor. Forgot to mention that I did install new champion plugs. Joined: Apr 2015 Posts: 6 Likes: 0, Points: 0, Legacy Aug 3, 2011 · Re: Compression Question 110 HP V4 Johnson - 89 The compression between heads can vary due to manufacturing methods. Aug 22, 2002 · Re: 1988 Johnson 90 hp V4 won't idle Clanton, I rebuilt the carbs last fall, set the floats during rebuild. on the left side the top cyl. Low compression, wont idle below 1500 rpm I had same compression readings on mine and went to all sorts of trouble finding out why. Adding oil to the cylinders temporarily skews the compression readings and is not a valid number. New $12,000, used $7,500. It has spark, turns over "freely" with the pull start . The motors compression seemed low about 70-80lbs on all 4 with all 4 Mar 12, 2007 · compression on 90 hp 1996 johnson v4 I check the compresion on my engine the right bank was 120psi on both cyl. Although manufactured from 1969-1997 they received no significant design changes after 1984. 150 V6 had fairly low compression heads as they were meant to be a work horse engine with its 1" carbs. Johnson outboard 90hp V4 outboard motor compression test, 110 psi for all 4 cylinders, 2 cycles, 1982 model J90MLCNB, serial # J5686362 Jan 26, 2011 · 11,551. I had loss of power two weeks ago over 5000 RPM and checked spark and compression. This is the process. Can I get by with replaceing the rings and head Feb 20, 2019 · I recently purchased a 78 Johnson 115 v4 model 115ETL78C. Certainly is worth a try Jun 13, 2008 · Re: 1985 Evinrude 90 HP Compression readings? On most Johnson/Evinrudes you want compression numbers that are within 10% of each other and preferably over 100lbs. I did not do anything at the distributer cap end as of yet. My guess is he lost a ring. With the plugs removed, the spark should jump a 7/16" gap with a strong blue lightning like flame. Runs, idles, trolls, and runs at 45-5000 RPM at WOT. Keep in mind, this engine may not have been started in over 5 - 10 years??? After putting some miricle oil in the spark plug holes and letting it sit for a day, we hooked up a new battery and new spark plugs and tried to kick it over. Apr 20, 2015 · 1989 Johnson 90 HP V4. 60psi sounds like a broken or stuck top ring to me so I would investigate that straight away. I let it run for about 4 minutes and it idled good and accelerated fine Oct 5, 2009 · re: 1986 johnson 90 hp v4 Does you carb have an idle adjustment screw? I read before tuning it up to have it at about a turn and a half open (but that is for my B&S riding mower engine, so it might now be the same. In 1969 the Johnson/Evinrude V4 engines were completely redesigned from top to bottom. Good spark from all coils, will all jump a 7/16 gap. Compression should vary up to 10% between all cylinders. Tested at WOT. 7) Data weign (without engine oil) Overall width (side to side) Overall height mm (in) mm (in) mm (in) DIMENSIONS AND WEIGHT Aug 28, 2009 · I just purchased the boat last week, 1st one by the way, into the mechanic shop already. Done after running for a few minutes. You're right there on the edge of 15% but it's not like 15% is some magic rebuild trigger number. 4) 1738 (68. As much as 5-6 lbs between sides. Jun 21, 2021 · Need some advice. Or you can go the other way with 121 * 1. Dec 1, 2012 · Bottom left cylinder compression was 65 psi, this has a missing top ring and scoring of the piston skirt. Try that for de-carbonizing your engine. However I have 140 psi in 3 cylinders and 100 psi in 1 cylinder. The heads on that 140 were good heads-probably normal compression was in the 130+ range when new. So that looks good. Jul 20, 2009 · 1989 Johnson v4 120 Looper Compression 120 +/- 3 on all cylinders New Rectifier New Power Pack All new fuel lines/tank This motor has been great for many years, but recently has been giving me a fit! It started with a mild hesitation at WOT like a minor skip and then progressively got worse to the point that it wouldn't plane out or even idle Find 1992-1998 V4 Crossflow Bubbleback Powerhead -- 112, 115 HP - Remanufactured here. Apr 16, 2012 · 115 HP Outboard Motor Apr 7, 2015 · Johnson V4 140 No Compression on 1. I have never had an issue with the engine in the 4 years that I have owned the boat. Motor has been sitting for who knows how long. Apr 9, 2006 · Re: what should compression be on a 1991 120 hp evinrude? Well guy's did a compression check today and the numbers are standing behind the motor looking at it 122 128 V4 125 125 Dhadley the motor was not run for about 8 months had to squirt a little 2 cycle gas mixture in the carbs and it fired up. Realistically. 040, but gap them all the same. I heard the loop charged motors test low but 80 still seems really low. The suggestion to try a decarb on that engine is a good idea. What is the easiest/safest way for me to check for a spark? Dec 23, 2015 · I am trying to sell my boat that has a 1996 Johnson V4 115. Oct 4, 2004 · On my 1988 Johnson 90 HP V4 outboard I have an idle problem. Compression test shows 130, 120, 115 and 90(scored). Definitely outside the 10% and seem low but can't find what the normal compression numbers should be. Not unusual for ignition problems to show up once the engine reaches normal operating temps. Johnson A recently overhauled stock 90 should make 125 lbs of compression. I took it to the local OB repair shop and they advised that I need a new powerhead. Aug 25, 2012 · Re: I have an 84 boat with Johnson 140 hp. Turns out that I scored #3 piston. Do these engines have probs with the rings sticking from carbon? Any info would be a great help Jul 30, 2009 · If you have one low cylinder on a v6/v4 you have another problem as the rods and pistons beng the same part have far less chance of being different. Looking for some diagnostic expertise on some compression test numbers on a 1984 Johnson 90 HP V4. The bad news is that the compression is only 37psi. The current owner has been running the engine with a pre-mix of 50:1 but the engine I would have thought is direct injection. Colin" Reply Jul 6, 2010 · Re: 1995 Evinrude 90Hp V4 Low Compression on Cyl #3 I've got the engine apart following the manual. " 9. 040 or . 9) 1611 (63. Jul 21, 2016 · I have a question about a compression test on a 1989 Evinrude V4 140hp. Jun 29, 2005 · Just bought a 1994 Glastron ss170 with a Johnson V4 90HP outboard. Was having issues with starting/running my 2000 115 after winter, mechanic said there was water in fuel and he took care of that, started right up. Some smaller rope start motors will only give readings of around 80psi, but as long as the reading are even across the cylinders they run well. Sep 23, 2004 · 15 lbs as stated is the max compression difference between cylinders. Just traded my brother for a 1969 9. He suggested rebuilding or replacing motor. The results: one cylinder 125 psi, the other three 100 psi. What should the compression be? I doubt any factory consumer V4 crossflow ever made 150 lbs compression. sqlj rynls huxi engz livqoq muotg krgd mbosmqezn utjcnl venw