420 TIMING MARKS

[bubsdad]

When the timing marks on the cam and crank are aligned on a 420 is the pistom at TDC?

Mine is not and I am not sure looking at the manual if that is correct.

Thank you for any insight.

 

[Dave (in IL)]

As i foggily recall there should be more than one mark on the flywheel. One marked TDC and one marked Spark. On my 420 if you are aligning the spark one the piston will be before TDC. As I recall the book says TDC for slow idle and Spark for fast idle (wide open).

 

[Anonymous-0]

I have no flywhhelon the engine yet. It is still on the stand BEING ASSEMBLED. My question is reguarding the timing marks on the cam and crank gears. when these marks are lined up the piston is not on top dead center, is this correct?

again thanks for any help

 

[d. coleman]

my "M" engine is of same family. the timing marks for crank and cam will not have the engine at TDC, slightly off. flywheel is pinned so it can only go on one way. i was confused also, forum members answered my question about same matter. good luck, d. coleman(48M&51B)

 

[LH TURNER]

IF THE TIMING MARKS ARE MATCHED,THE MOTOR WILL NOT BE ON TDC!!!!!I ASSEMBLE MY MOTORS AND INSTALL ON THE TRACTORS WITH THE OIL PUMP OUT. I THEN FIND TDC ON #1 CYL AND INSTALL THE OIL PUMP CORRECTLY(SHORT SIDE AWAY FROM TRACTOR RUNNING PARAEL WITH THE CAM OR CRANK). THAT WAY YOU CAN SET YOUR DIST AND NOT HAVE TO REPEAT THE PROCESS.