Mercruiser 502

[Formula24]

What is the suggested idle RPM and cylinder compression (PSI) on the following engine:

1996 Mercruiser 502 Magnun 8.2L (Carburator)

Thanks.

 

[Bondo]

Re: Mercruiser 502

Ayuh,....

Idle is 650rpms/ 750rpms.....

Compression should be even accross the board,...
150+psi is a New motor,...
Below 120psi is Worn Out....

 

[Formula24]

Re: Mercruiser 502

Bond-o

Thanks for the info.