Engine compression

tom2

Seaman Apprentice
Joined
Mar 20, 2005
Messages
31
Hi,<br />I have a 1977 70 HP Johnson and would like to know what the compression should be. I took a compression test and all 3 cylinders show 105 pounds. Should this engine run good?<br />Thanks,Tom
 

DHPMARINE

Captain
Joined
Dec 16, 2003
Messages
3,688
Re: Engine compression

I consider these readings good for a 1977 engine. You may also want to do a spark test,and do a fuel sample.<br /><br />DHP
 
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