Posted this on the Case forum a few days back but didn't get any response so here I am; have rolled the engine to #1 TDC compression,mark on flywheel is visible through plug hole in bell housing,turned mag until it snaps at #1. This is a Case mag I believe and has a pointer indicating which tower is being fired. Then bolted mag in place and towed.It will fire,late I think as we can get flame out the exhaust when I tweak the run/start lever on the back of the mag.I narrowed the points up a bit but this did not change anything. Went through the above steps several times,including hand cranking and watching the valves/spark relationship which appears close. Finally called it a day shortly after mid night and drove home (an hours drive) so don't feel to brilliant today. Any help with this issue (the tractor,not me!) would be appreciated, Bob