I'm still not sure how I would be able to mark the flywheel with out spliting the tractor. I can just barley get my hand in there, never mind be able to see what going on in there with my hand in there!
The only thing I could do is make a static mark some where on the front of my tractor and then make my own TDC & 30 deg mark on the crank pulley. That might not be quite so hard. Oh and I see you say 40 deg ATDC @ WOT, all my books say 30, maybe that's WOT under load?
I like the timing light with a tach idea, the only thing I worry about is if I do have slop in the drive system and I get the high idle zeroed in what that's going to do to my low idle timing. Using this method I'm assuming it's best to have the machine under load? I don't have a dyno but I do have some PTO implements that would at least give it a bit of a load.
Maybe I'm just being to picky. Can I really do terrible damage to an engine that WOT is 1400 RPM by being a bit off with the timing? Really, all I want to do is get rid of a miss.
I'm going to time it statically, see what that does for me, then go from there.
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