Merc 9.8 Compression

bjarnold1

Petty Officer 2nd Class
Joined
Nov 12, 2005
Messages
136
I have a 1967 Mercury 9.8hp that the compression is 120 on cylinder #1 and 110 on #2. Is this low?
 

bjarnold1

Petty Officer 2nd Class
Joined
Nov 12, 2005
Messages
136
Re: Merc 9.8 Compression

Is there a way to run the motor with the prop shaft missing?
 

Laddies

Banned
Joined
Sep 10, 2004
Messages
12,218
Re: Merc 9.8 Compression

No not with the uni on as fwd gear is c enter in the housing with the propshaft but if you remove the housing the engine can be started to see if it will run or if you hook a small water hose to the water tube it can be run through warmup just don't rev beyond 1500 RPM
 
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