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02-27-2017, 09:34 PM #15000 RPM
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Compression on late 80's model johnson gt 200
Is 70lbs across the board to low on compression for this motor? Heard factory was around 90.
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02-27-2017, 09:38 PM #2
Is it a 3 liter.with idle relief holes? Cranking cold with the throttle closed and cyl dry will mite bring a 70 reading.
What mota is it?
Or is it a 1986 or 87 2.7 L ? Then it should be 115 psi
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02-28-2017, 06:56 AM #3Screaming And Flying!
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Did you try decarbing the motor that might bring it up. It seems a bit low did the motor sit for some time?
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02-28-2017, 07:31 AM #4Screaming And Flying!
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Put some oil in the holes and try again.....
83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
Rebuild thread:
http://www.screamandfly.com/showthre...-it&highlight=
http://www.screamandfly.com/showthre...cs.&highlight=
Videos
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02-28-2017, 07:02 PM #5Member
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I want to say that my 89 was 110-115 right after I finished the rebuild. If it really is 70 it won't run worth a crap. I would probably pull the heads and inspect the cylinders and see how much carbon is in there.
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