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Mercury 850 - 85 HP serial# 7033801

K

Kever

New member
Wiring to controls not hooked up. Is there a way to test the motor? I don’t want to sink a bunch of money in to the motor unnecessarily. I have no idea when it ran last. Approximately 120 psi on cylinders 1,2,4 and 90 on cylinder 3. That’s testing with pulling the flywheel with a rope. Could cylinder 3 be valve related? Any thoughts? Thank you! Kever
 
There are no valves in the cylinders.----There are reed valves that have to do with compression in the 4 crankcases.----Remove bypass covers to look at # 3 piston and rings.
 
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