Mariner 50 HP Compression

[Excalibur5]

Hi sadly my force 70hp blew up on sunday and was towed in by the coastguard. Looking at a 50hp mariner as a replacement. Does anyone know what the compression should be on each cylinder?

 

[JB]

Re: Mariner 50 HP Compression

Measured psi varies too much with gauges and technique to quote psi.

If you do the compression test EXACTLY as described in the Engine FAQs with a good gauge, you should get both cylinders within 10% of each other and over about 100psi. The 10% is the important part.

 

[Excalibur5]

Re: Mariner 50 HP Compression

Many thanks JB