how much compression? mercury 15

Badburn

Seaman Apprentice
Joined
Jul 27, 2010
Messages
49
I've spent a fair amount of time searching this site and reading my manual, and found nothing that shows a number. I have a 1989 15 horse mercury, both cylinders show 80 lbs. Is this enough for it to run properly? I am having an issue of dropping a cylinder after a minute or two at wot.
 

JB

Honorary Moderator Emeritus
Joined
Mar 25, 2001
Messages
45,907
Re: how much compression? mercury 15

Compression is fine. My guess is that you have a hot failure in the ignition.
 
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