Timing a Cub engine

Klein Rot · Mar 29, 2009

Hy folks,

I restored a Farmall Cub and i want to now on witch timing mark, the first or the second, the spark should occur when the engine is running.
This one Cub has a magneto.
THANKS

Bigdog · Mar 29, 2009

With a mag you should have only one mark on the pulley which is TDC. If you have two marks the second mark is TDC. That is the one you use to set the static timing. Once you get above about 400-500 rpm the mag will advance but it is a fixed advance so if you set the static time the advanced time will be correct.
The timing procedure for the mag is in the operator's manual.

Timing a Cub engine

Klein Rot

Member

Bigdog

Well-known Member

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