low comp cyl 1 and 2 on a 90hp johnson

T

tony11905

Seaman
Joined
Sep 7, 2010
Messages
67
i was wonder if anyone could tell me is if this is most likley a head gasket problem or something more mayjor .the comp.in1 and 2 is 60-90 and in cyl 3 and 4 comp. is 110-115 so can anyone give me somekind of idea thanks
 
D

DJ

Guest
Re: low comp cyl 1 and 2 on a 90hp johnson

Go ahead and remove thye head. It's easy to do. Your answer will be in there.
 
E

emdsapmgr

Supreme Mariner
Joined
Dec 9, 2005
Messages
11,551
Re: low comp cyl 1 and 2 on a 90hp johnson

The cyls 1 and 2 are the top cyls of each head. Do you mean both heads have low compression on the top cyl? 60 and 90 are both low readings. When you pull the head, you are looking for the stainless steel seal ring on the head gasket. If that seal ring is damaged so that it leaks compression, it needs to be replaced.
 
You must log in or register to reply here.
Top