Fishin_Rev
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I did a compression test today on my 18hp johnson. I had 103# in the top cylinder and 108# in the bottom cylinder. Does anyone know what the ideal comp should be.
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compression on a 1962 18hp johnson
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catmansteve
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Rope start or electric start? I know that makes a difference... I'm not sure what "ideal" would be, but that sounds like an acceptable number to me. I have a 66 18hp, rope start, and I think mine was around 110 or 115 on both
Fishin_Rev
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FD-16-A manual start, but it does have the option for electric start i just dont have it hooked up
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There were no differences between powerheads for electric start and non electric. Your numbers are good. You have a good engine to work with.
catmansteve
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I know there isn't a difference in powerheads, I'm saying that a slightly lower reading from the tester is acceptable from a rope start because you'll never be able to pull it as fast as the starter will spin it, this is especially true with a bigger motor like an 18Pappy said:
