Posted by Tom Fleming on September 14, 2014 at 05:08:31 from (67.20.239.72):
In Reply to: h4 magneto 180 off posted by calcubman on September 13, 2014 at 10:59:44:
OK, I have been watching this thread, and there have been some suggestions. The only way to be 180 degrees off (if the internal timing is correct) is if you have the drive lugs 180 degrees out when you mount the mag on the tractor. Also, has the governor gear been out/moved? what is the history on the engine. rebuilt? did you change the impulse over? there are CW and CCW impulse assemblies, and they MUST match the rotation.
The best way to correct your issue (if everything else is right) is to change the mesh point on the rotor drive gear inside the mag. There are two markings on it (R and L), one for CW rotation and one for CCW rotation, as it is the same part for both mags. the timing mark should be set to L for CCW (diesel) and R or CW or gas. Since I cannot see and did not see what you actually did, it is hard to guess at exactly what is wrong.
if you have the gear timed to R, and are still having issues, open the front of the mag up (can be done while still on the tractor), and pull the points cover off. While noting the rotation of the drive gear for the rotor, advance its mesh by 1-2 teeth, and test again. When you get the impulse to trip at TDC, you SHOULD be ready to go (not knowing what all has been done).
Personally, I would have sold the diesel mag to someone who needs it and get my money back to invest in the correct mag, or I would have transferred the new parts(coil, points, condenser, etc) to a donor mag body. When you are done with this adventure, you will have more $$$ invested in your labor that you paid for the mag. When you are done, you will have a modified mag, custom timed internally, where the rotation and the timing do NOT match the serial number. While you own it, not a crisis. If you sell the tractor, it will be someone's nightmare down the road. It is your tractor though, and I do wish you good luck.
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