1999 Mercury 50 4 stroke, compression help

ext711

Cadet
Joined
Jun 12, 2005
Messages
9
Here are the readings cyl 1 = 80
cyl 2 = 40
cyl 3 = 50
cyl 4 = 110

They all hold pressure so I dont think my rings are stuck, or my valves are not sealing. Were should I start with this problem? I just bought the boat knowing there is a problem with the motor.

Thank You
Jimmy
 
Top