cruiser 3.0L timing question

longtravel

Cadet
Joined
May 28, 2009
Messages
8
Having trouble finding the correct timing numbers for my 2003 3.0L.
The operation and maintenance manual that came with the boat says 2 degrees ATDC. The sticker on the air filter says 1 degree ATDC. and the mercruiser service manual says 6 degrees BTDC. Im not sure which numbers to go with. Also is there anything special that needs to be done when setting the timing other then hooking up the light and twisting the distributor to set it?
 
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