Posted by flatlander on September 15, 2010 at 22:03:36 from (8.20.214.112):
I am trying to time the mag on my M. I can not get it to impulse at tdc. The engine has two marks on the crank about 1/4 inch apart and I have verified that it is at tdc compression #1 cyl when at those marks. I continue to turn it by hand 1/4 turn of the crankshaft to a third groove in the crank pulley. That is when the mag impulses or clicks. The rotor in the cap points to number one post when the engine is at tdc ( the two marks at tdc and piston at tdc.)What am I missing. I have timed the mag on my H using the same two marks at tdc. On the H, the mag impulses at tdc like it says in the mag timing book. I know I can check the timing of the rotor by the marks on the small gears in the mag. But how can I change the impulse position. If I change the mag position by 1/2 turn, It will still impulse at the third mark. I tried a second mag and it impulses at the same mark and the rotor lines up at #1 at actual tdc.
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