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Need tuneup info

sandi

New member
I have a 1979 120 hp I/O mercr

I have a 1979 120 hp I/O mercruiser and want to check the timing.I have the 8 degrees btdc but i need to know what RPMs to set this at? Does anyone know what this would be?
 
"That sounds like the idle set

"That sounds like the idle setting to me, but I'm no expert on the 120 hp.
Hopefully someone else will know for sure.
Rod"
 
Base timing 8* in your cas

Base timing 8* in your case would be set at idle speed. I believe its 650-750 RPMS in gear is normal idle speed.

Mr. B
 
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