1988 johnson 150 outboard compression test|1988 Johnson 150HP compression : exporter I've purchased a boat that's in beautiful condition but I'm concerned about the compression numbers on the GT150. I'm not familiar with Johnson's specs and I've heard that some of .
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I have an 84 Johnson 150HP V6 Outboard, The starter is missing 3 of the 8 teeth. It still starts, just sounds weird while the starter is cranking but when starts, seems to run fine. I . i have a 150 johnson 60 degree head design and the compression is 90 on all 6 cylinders. is that low? S. I'm looking at purchasing a boat that's in beautiful condition but I'm concerned about the compression numbers on the GT150. I'm not familiar with Johnson's specs and I've . The compression being within 5psi on all cylinders is what I prefer on used outboards, regardless of the "within 10%" rule. I feel more confident if they're nice and even. .
Prepare the engine for a compression test as follows: 1. Run the engine until it reaches operating temperature. The engine is at operating temperature a few minutes after the .
I've purchased a boat that's in beautiful condition but I'm concerned about the compression numbers on the GT150. I'm not familiar with Johnson's specs and I've heard that some of .Step by Step Instructions on how to correctly do an Outboard Compression Test on any outboard engine. Read about the causes of poor compression..
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On a 4 stroke engine, most mechanics and dealers will perform a leak down test, to see how much pressure escapes over a set period of time. On a 2 stroke engine, a compression check .
I've got four different compression gauges and I can test the compression on the same cyl of a mtr and get four different readings. They do vary. If the mtr is running good, . Understand the importance of the outboard motor compression test for boat maintenance and learn how to perform it correctly. Discover how to diagnose common issues, troubleshoot low compression problems, and keep your engine running smoothly. Preparing for the Outboard Motor Compression Test. If you don’t do this test, you won’t figure out the exact problem and end up causing further damage to your vehicle. Sometimes, just by doing a compression test, you can come across the problem immediately. How to Test Low Compression in One Cylinder Outboard. Well, testing the compression in one cylinder outboard takes a heck of a time.
Re: 1988 Johnson 150HP compression - new purchase 80-85 is acceptable, FreeGo. Those big V6s were low compression engines to start with. Throttle position (in a 2 stroke) means nothing. Decarbing never hurts, but I wouldn't expect anything dramatic. Can't judge the boat, but the big Johnny sounds like a good outboard.
An outboard gas engine needs air, fuel, spark, compression, and unobstructed exhaust — in the right amounts and at the right time. As the piston travels up and down in the cylinder, the piston rings seal against the cylinder wall so the air/fuel mixture can be compressed at the top of the cylinder on the upstroke. Here's how to do a compression test on your Mercury outboard 2-stroke engine. Or download a repair manual instantly here. HOME; . 1988-1989 2.2 HP 4 HP 5 HP 8 HP 9.9 HP 15 HP 20 HP 25 HP 35 HP . DOWNLOAD 1956-2013 Johnson-Evinrude Repair Manual November 27, 2016 1. DOWNLOAD 2002 50HP (50 HP) Mercury Outboard Repair Manual . Re: 1985 johnson 150 compression Minimum cyclinder compression should not be less than 100, but the actual readings are not as important as the differences between cyclinders. Re: 1989 Evinrude 150 Compression It certainly makes sense that the compression would be low if it is not broken in yet. In 1989 OMC made two different 150 engines, the basic model and the XP/GT model. The XP/GT models were the high performance models and had factory high compression heads and large carbs.
I have a 1988 johnson gt 150 on a 1989 nitro 1800tf (17ftbass boat). . Johnson Evinrude Outboard Forum . 1988 johnson gt 150 low hp problem . says " low hp problems "-----So hurry to a shop to have the motor output tested.-----This can be done with a test propeller or a dynomometer. Reply. C. Chuckd Member. Compression values are not published.----There are too many variables between gauges and test methods.-----The most important thing is that they are the same for both cylinders in your case.-----Hopefully this motor was never run on 100:1 as some motors were in the late 80's.-----Excellent motors and many were built between 1980 and 2000.----So lots of .
Yes there was oil in the cylinder. I have heard people say that the "Wet" test is the best way to test compression. I did the test with the engine cold with no oil. The results for the cold (dry) compression test was 110, 103, 105, 80. The cylinder that tested at 80 went up to 120 when I did the wet compression test. have 150 horse black max 78 85 have 150 horse black max 78 85 psi on all cylinders 21 stainless prop runs excellent powerful the book calls for 130 to 150 psi how come my boat runs well on 85 psi?and what kind of power are we talking about if i bring the compression up to 130 will the boat run. Johnson & Evinrude Outboards . 70 HP Johnson compression test. Thread starter wetcoaster; Start date Jul 11, 2010; Status Not open for further replies. W. wetcoaster Cadet. Joined Aug 19, 2008 . 70 HP Johnson compression test Are you doing it with a pull rope or starter? It's low if your doing by a starter, and they should all be within 10% . DOWNLOAD MANUAL http://www.manual911.com/select-outboard-engine-brand.html"primary compression" two stroke engine "what is the compression on a losing compre.
Evinrude/Johnson Motors; 1988 GT150 Compression Numbers; Thread: 1988 GT150 Compression Numbers. Results 1 to 4 of 4 Thread Tools. . Good Compression Numbers & Leak Test Numbers for 01 150 HPDI. By johnbass1 in forum Yamaha Motors Replies: 3 Last Post: 06-01-2009, 05:55 AM. For years, Johnson Outboard Motors has been a staple in the boating community due to their reliable engines and strong performance. The Johnson 150 outboard has been a popular choice for boaters, converting . Johnson & Evinrude Outboards . Evinrude 150 (low compression on 1 cylinder) . Evinrude 150 (low compression on 1 cylinder) Hello, . and the others were around 85. After the first compression test I put a little oil in the low compression cylinder retested, and it came up to 80, i then removed the tester, & cranked the engine over to clear .
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Johnson & Evinrude Outboards . 15 hp Johnson Compression. Thread starter Khenders; Start date Jul 15, 2007; K. Khenders Seaman Apprentice. Joined Jun 3, 2007 Messages 38. Jul 15, 2007 #1 I have a 15hp Jonson (J15RCOB) that tests ~65 & 70 PSI. . 15 hp Johnson Compression I think if you do it right, you can add the fresh premix on top of the .
Re: 40 Hp Evinrude Compression test If the motor sat for a while shoot some pb blaster into the cylinders and wait a while before testing. See the top secret file about awakening a sleeping outboard at the top of the page. Stuck rings may give a bad compression reading, but can sometimes be unstuck without a major teardown.
Hello, new to this forum and to Yamaha outboards. Looking for some input on compression readings as this is my first time dealing with a Yamaha outboard. I'm looking at a bay boat with a 2001 Yamaha 150hp 2 stroke. My compression results were all in the 90psi range for all 6 cylinders.CLEAN 2004 TRIUMPH 190 DC! A 150 hp Johnson outboard with power trim and oil injection powers this rugged fishing boat. Features include: snap-on cover, dual consoles w/windscreens, Humminbird Matrix 25 fish/depth finder (screen has several small cracks), Uniden MC535 VHF marine radio, Clarion AM/FM CD stereo, gauges including; speedometer, tachometer, fuel, . I'm looking at purchasing what seems to be a clean 1988 Johnson 70HP VRO (disconnected VRO) outboard motor. Went to look at the motor, we started it up and it ran good on the ear muffs, but only for a minute. Brought a compression tester from Autozone and removed all spark plugs per compression test thread, opened throttle and checked each .
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The original Yamaha 150 outboard motor made its debut in 2003, and since then, it has been reigning over the sales charts with some modifications in the specs. Yamaha 150hp outboard motor is commonly used to power around 6.5m trailer boats to pontoon boats, RIBs, powered catamarans, social tow sports boats, and so on. I did a test of compression and spark in my 1988 Johnson 30HP outboard. I was happy with the results. I just need to get some fresh gas now and try to star. Re: Johnson 150hp Outboard compression Compression will vary with the cranking speed. The cranking rpm should be close to 300 rpm. Normally the compression on the starboard bank would be in the 100 psi range with the port bank being approximately 5 psi lower ie... if the starboard bank registers 105, the port bank would normally register 100.
Johnson & Evinrude Outboards . 83 johnson gt150 compression test results, and need advice please . . 83 johnson gt150 compression test results, and need advice please. Thread starter motodave; Start date Dec 19, 2014; M. motodave Seaman. Joined Dec 9, 2014 Messages 73. Dec 19, 2014 #1 Ok, the short re-cap so far: on my last lake test after .
Once the outboard reed valve gets damaged or fails to function, it affects the engine performance or outboard motor. During driving or accelerating, the motor will start acting like dying but gradually builds up acceleration. It happens as a failing outboard reed cannot respond to the increased fuel flow. Symptom 2: Lack of Power Johnson & Evinrude Outboards . . compression test question, 1989 150hp johnson. Thread starter crabbydad; Start date Jun 11, 2015; C. crabbydad Petty Officer 3rd Class. Joined Apr 20, 2009 Messages 75 . Apr 20, 2009 Messages 75. Jun 11, 2015 #1 I did a compression check on a 1989 150 VRO Johnson on a 19' grady tournament. on 5 of the .
whats the should the compression psi be for a johnson 150?
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1988 johnson 150 outboard compression test|1988 Johnson 150HP compression