Mercury outboard 150hp blackmax timing

George62

Cadet
Joined
May 30, 2022
Messages
16
Trying to get this right . I have read alot of post ,utube, manual.
At TDC my timing Indicator reads 3.
Is this right .....what should it be.... I find so many others saying different numbers
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
27,949
Obviously at TDC the timing pointer should read TDC.

You are supposed to Set/check the timing pointer. Do you have a .464" mark on the timing decal? if so, set the #1 piston to TDC using a screwdriver. Now measure from cylinder head to top of piston. Add that measurement to .464 inches. Turn flywheel toward the .464" mark until you measure the sum obtained. Now set the TDC pointer to the .464" mark.

Now time the motor 0-9*ATDC for Idle pickup timing and 21* max spark advance.
 
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