Update - M is up and running.

I'll work on the timing more tomorrow, but what does everyone suggest on setting timing. Heard of just setting by ear, other's say the rotor should be just past #1 at piston TDC. Whats the consensus (sp?).

Thanks for all the help guys.

Bobg

So, as you hand-crank it with the "kill switch" in the "stop position", you will hear the impulse "snap" at #1 TDC.

When it is started, as soon as the impulse cuts out, it advances all at once to running timing.

This advance or "impulse lag angle" is determined by the manufacturer's "specs" for the impulse.

So, with # 1 firing @ TDC while cranking, and the impulse working, and set up properly for the engine, the running timing will be correct.

Does this sentence mean that the mag should be adjusted so that on "snap"...the piston be at TDC? I think that is what you said...??

With a magneto, the timing "spec" is TDC while cranking.

The impulse will "snap", and spark will occur at TDC.

Then, when the engine "catches" and speeds up enough to "kick out" the impulse, spark occurs at 35 degrees BEFORE TDC.