you need to clean the mag points with file or dry oil stone.
they are under the flywheel.
look through the oval twin holes in the cast.
rotate it till you can see a round cover.
you might have to remove flywheel.if the cover is still in place.???
if you have to remove the flywheel.
mark with punch or scratch, to line up for timing.
when you reasemble.
points just open on last upstroke of piston,last 3/16 of an inch.
also try the atco web site.
paul
November 2007