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Compression Numbers for BGA's Oceanrunner
Hey guys, I was working on my motor today (1996 200HP Johnson Oceanrunner) and decided to do a compression check just for the heck of it. Here's what I ended up with from the top down:
98 100 93 102 90 97 I'm not sure how great my gauge is; I noticed some of the rubber seal was getting a bit torn up as I was using it, but it seemed to be working fine as far as I could tell. Anyway, are these numbers okay? Thanks! Steve
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 1990 Hydrasports 2000cc Vector with 96 200HP Oceanrunner. Saved by grace alone, through faith alone, in Christ alone http://www.providencerpchurch.com/ 
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#2
07-20-2009, 07:41 PM
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They say stay 10% to each other, your close to it with that 90
But I had that on a Yamaha one time did a decarb and all the numbers improved and were all with in 5% when done. But what do I Know??
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1986 V20  Old Fishermen never die, we just SMELL that way!!
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#4
07-21-2009, 07:07 AM
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Phatdaddy,
That was on a cold engine and the throttle was not wide open. I didn't realize that was a factor. Is it better to have the throttle wide open to get a more accurate reading? Thanks. I will try MJ's suggestion anyway since it can only help.
__________________
1990 Hydrasports 2000cc Vector with 96 200HP Oceanrunner. Saved by grace alone, through faith alone, in Christ alone http://www.providencerpchurch.com/
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#5
07-21-2009, 06:49 PM
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BGA, to be honest, i don't know. it's the way i was taught to do compression test. as my wife , the science teacher, would say "lets make this a learning experience". do another check with a warm engine & open throttle's and we'll compare.
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