yamaha 35hp four stroke compression test|2003 yamaha 4 stroke motor problems : companies Compression check was re-done at a Yamaha authorized dealership and numbers came in at 185 across. The engine was warmed and throttle was wide open. Diagnosic report .
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If the compression test indicates something is not right with cylinder #3 (low compression vis a vis the other cylinders) it is time to do a differential pressure test. That . looking at buying a 2000 pursuit 3070 powered with twin 2004 Yamaha 225hp four strokes. i'm new to the whole 4s engines. I had the marina send a guy (@ 0/engine) to . What would be good/normal compression for a used 2005 40hp four stroke, seller says under 60 hours on outboard. I was under the impression there is know way to tell .Results vary depending on whether the outboard is a Four-Stroke or a Two-Stroke. Good results for Four-Strokes should be 180-210 PSI, and Two-Strokes should be around 110-130 PSI. Here is everything that you need to know .
Watch the video above or follow the steps below to learn how to perform a compression test on a Yamaha F225 outboard. Compression check was re-done at a Yamaha authorized dealership and numbers came in at 185 across. The engine was warmed and throttle was wide open. Diagnosic report .A compression check can indicate that the piston rings are working properly and that the cylinders are in good condition. The test measures how much pressure is built up by the motion of the piston inside the cylinder, given in pounds per .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 .
A leak-down test is more informative on a 4-stroke outboard and that is what Yamaha recommends for checking condition. R. robert graham Admiral. Joined Apr 16, 2009 Messages 6,908. Jan 25, 2011 #3 Re: Compression #s 2005 Yamaha F150 Those numbers sound fine to me, within 10% between cylinders is the rule of thumb. Readings may vary from . Re: Compression for a 115HP Yamaha 98-2005? Hello Just got back and the engine is a 1997 Yamaha 115HP 2 Stroke non-oil injected that is super clean, when the guy popped the cover off I was shocked. Just totally clean, Im .
yamaha 4 stroke engine problems
The factory compression psi for Yamaha outboard engines is an important indicator of their overall performance and efficiency. Step 5: Interpret Results Using Yamaha-Outboard Compression Chart. When analyzing the . Looking at a 2014 90hp 4 stroke and have a concern. There was what was thought to be a piston issue because of low compression. After piston work was done compression was still low so looked at valves and there was an issue with them and they were replaced. Compression went to 260 which seems to be way out of whack to me. Has Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. . I did a compression check and my lowest cylinder reads 100 psi and the highest being 107 psi. . Just for comparisionI have a 1987 200 with 1200 hours and compression is 110 - 120 psi (cold and dry . Re: low compression on all 3 cylinders in 84 yamaha 40 hp First, to do a compression test properly, the motor must be heated up first. Considering you got reasonably high numbers (for a 40 horse) while cold, you probably don't have a problem with compression. I only have 110-115 on my 50hp Yamaha and it's from 2003.
exhaust corrosion 2002-2005 ish 3.3l yamaha and mercahama four strokes. f200, f225 and f250 all have potental issue. some incidents found in bookend year motors like 2006 so be safe and have leg dropped and camera scoped. compression should be taken when motor has been warmed up and throttle is wide open. motors worthy of purchase should be at least .Then four-strokes are going to be somewhere between 150-210 PSI! This is where the throttle position comes in. On say a 250 HP Yamaha four-stroke. If you do a compression test, (click here to learn how to perform a compression test.) and you have the controls closed. You will see a good compression reading of 150-160 PSI.
I did a compression test on one yesterday, at the customers request, (personally I think a compression test on a 4 stroke is a waste of time,) A leak down test is more accurate, anyway, my readings were 205 across the board, make sure the throttle is wide open. and the batteries fully charged, the results will be way off if not.. best rule with a 4 stroke is a LEAK DOWN test. compression test is a teat on a boar hog on that motor. I am currently working on an F80 that had 143 on #1 and 135 on #4 but number 4 was the one letting in the water due to a corroded head. leakdown was 45% on 4 and 10% on 1. and you could hear the air from the tell tale. Four-Stroke, 9.9-hp Outboard Motors Test 2009 Yamaha 9.9- and Suzuki 9.9-horsepower outboard engines challenge Practical Sailor reigning champion, the Mercury 9.9. By. Darrell Nicholson - Published: February 19, 2009 Updated: March 2, 2020. 0. . In this test, the Yamaha gets the nod over the Suzuki. Of the three heavier engines, we prefer the .
Anyway, i would be gratefull if you aswer me the question about the exact compression in a brand new Yamaha 90hp, 2-stroke of 1992.The other question is what compression will be adequate and what variation between the 3 cylinders.I am about to buy the respective engine used and i will have to make a compression test. Re: 2005 Suzuki 140 4 Stroke Compression Test We winterize a lot of four strokes and we always do a compression check. i disagree with rotbold on this one. 2 stroke or 4 stroke. we register the numbers and compare them with the last time we looked at the motor.How To Compression Test an Outboard Motor {TIGHTEN UP TUESDAY}Welcome back to Tighten Up Tuesday! This is a straight up step by step instruction video of ho.
Buy a Motion Pro compression test kit for your Yamaha outboard compression test at Partzilla.com: https://www.partzilla.com/product/aftermarket/3ILR-MOTION-.Before inserting the compression test adapter into the cylinder spark plug, make sure the O ring on the adapter is in place. I once ran a compression test with a missing o-ring and the results were pretty bad. I almost made a call to scrap or .
2003 yamaha 4 stroke motor problems
Steps and video on how to do a compression test for a Yamaha outboard and what the test results mean. . For a four-stroke, good results are between 180 to 210 PSI. Older engines generally fall on the lower end of these scales, while newer engines fall on the higher end.
The I-4 V Max Sho Series Yamaha outboard ranges in horsepower: 175HP, 150HP, 115HP, and 90HP. . The In-Line Four V MAX SHO ® 115 is Yamaha’s fastest 115-hp four stroke, ever, with a top speed of nearly 51 mph.* On top of its impressive speed, it features tech unheard of in its class, including a long-track intake system, free-flow exhaust .
My 1999 90C has 5.76:1,5:67:1 and 5:86:1(each cylinder slightly different) compression ratios, but these ratios are figured differently than a 4 stroke motor.believe the 2 stokes are figured from the time the piston closes all the ports up to Top Dead Center, whereas 4 strokes are figured from bottom of stroke to the top.I do believe that your Yamaha 60 four-stroke is an all-Mercury produced powerhead. kglinz: posted 05-06-2003 03:01 PM ET (US) . Just to keep you all updated, I did a compression test and the lower cylinder, the one which had the water droplet on the spark plug, came in at 120-PSI. The other three were between 150 to 160-PSI. The main thing . Re: Yamaha 250 Compression on most 3.1L yamahas you will see a 5 PSI variation as you go down the bank. compare 1-2,3-4 and 5-6 all should be within 10 PSI bank to bnk. I have seen a few replacement powerheads with 80 psi on one engine and 120 on the other with no performance issue.The portable series four-stroke Yamaha outboard ranges in horsepower: 25HP, 20HP, and 15HP. . Performance Bulletins Test data on outboard boat packages; Videos . Compression Ratio: 9.4:1: Recommended Fuel: Octane 87: Recommended Fuel Filtration:
I am new to large outboards. Looking to purchase a boat with a 2000 150 Hp. Yamaha. Compression tests show #1-125, #2-120, #3-125, #4-125, #5-125, #6-124. Do these numbers look good and was this a dependable engine .
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. I had a survey done today on a boat I am about to purchase and the surveyor was looking for the Yamaha compression ranges. Comment. Post Cancel. formula29. Senior Member. Join Date : Oct . and you wasted about 1/2 hour of your labor money on a STUPID compression test. waste of time on a 4 stroke. Boscoe. F80TLRY. cyl 1 140 PSI. cyl 2 135 . I was given a 1987 2 stroke 115 hp yamaha motor and I figured Id check the compression and check the spark..thinking it might have had problems. since it was free!! anyway the compression was 140 in all 4 cylinders.it is a 2 stroke V4. but on one cylinder the pressure in the screwed in.
"I called a friend who said 4 strokes have lower compression then 2 strokes and if it runs great don't be worried, another friend said i needed to have a leak down test down on a 4 stroke not a compression test." i believe you will find 4 strokes have higher compression the 2 strokes. A leakdown test is more definitive. 70 psi is very low.
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yamaha 35hp four stroke compression test|2003 yamaha 4 stroke motor problems