For good mag tractor starting, the initial start/impulse timing is critical. It needs to snap/impulse right at TDC, if before it kicks back if late its harder to start. I always first set the Lag Angle to match the drive cup used and then loosen the governor mount bolt so you can just turn the mag, turn the flywheel slowlyyyyyyyyyyy and adjust the mags rotational position so it SNAPS just as the LHI flywheel mark passes the flat timing mark at 3 o clock on side of tractor.
If you rotate it forward CW it retards the spark if backwards CCW it advances SET IT SO IT SNAPS RIGHT AT TDC
Is there a spark at both plugs ?? and is it snapping loud n sharp each 180 of flywheel rotation ?? If theres no mag spring winding n tripping SNAP (impulse assembly) she wont fire at cranking speeds.
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Today's Featured Article - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
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