violent shaking on mercrusier 120 i/o

[nightsniper1]

Re: violent shaking on mercrusier 120 i/o

Why a new head. If compression is good your valves are seating and your head gasket isn't blown (well probably)

A leak down test will tell you more without pulling the head off.

ok. when you mean leak down test, do you me the test with pressureizing it with an air compressor or a different leak test.

 

[J. Mark]

Re: violent shaking on mercrusier 120 i/o

http://www.carcraft.com/techarticles/116_0406_cylinder_leakdown_tester/index.html

This article explains it better than I can