OMC 120hp timing specs needed

Lgsr

Recruit
Joined
Jul 30, 2005
Messages
1
Can't locate the correct specs for timing my 120hp I/O. Not sure of exact year '71, '72 or '73.<br /><br />153 ci<br /><br />Any help?
 

retodd

Seaman Apprentice
Joined
Jul 9, 2005
Messages
35
Re: OMC 120hp timing specs needed

Its a GM block and the early mercruiser ones were to be set at 6 degrees.
 
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