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About LinkBacksWhats is the compression supposed to be? looked up old threads nothing on it and NO I DONT HAVE A MANUAL THANK YOU!
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August 26th, 2008, 02:31 PM #1[OP]Petty Officer 3rd Class
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What compression on this 1988 4hp johnson?
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August 26th, 2008, 04:21 PM #2Moderator
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Re: What compression on this 1988 4hp johnson?
What matters is how close the 2 cylinders are. They should be within 10% of each other and higher than about 50-60psi.
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