I recently finished rebuilding my D4 7J pony motor, but am not positive if I got the mag timed properly. What I did was just align the M mark on the drive gear with the M mark on the mag gear. I did not attempt to put pony on number 1 cylinder, which ever one that is! My efforts to start the pony so far have been futile, so got to thinking maybe there was more to the timing process than I thought.
Thanks for any input, Bob

Bob:
From what your are saying it sounds like it's not timed right.
I have a d4 G that I have timed, and what I do is:
Get # 1 cylinder or (left side) on top dead center.
Then lign up your (m) mark with the mark on the maganeto.
Note: when the cylinder is on TDC you should see the M mark on the flywheel.
Its worked well for me. Good luck
MIke

Thanks for the tip! I assume when you mention number one being on the left side, that you are sitting in the seat looking forward! Anyway, will recheck my job and see what happens.
Thanks, Bob

Here's the print version if that helps. Yes #1 is as you state.....good luck:D
Same drill for the J and U models if you have the American Bosch Mag.

Will get to the timing check in a day or so! Thanks for the helpful info!! Bob

If the mag gear is timed to the drive gear in side the engine then usually if the mag is out of time and not on #1 just switch the wires in the cap and this is for a D2 @ D4 starting engine.

I found the timing to be ok, so looks like i guess ok an that! Finally got motor to fire, but wouldn't start! Thought it might be a "lack of fuel" issue , so cleaned out the carb . Still limited firing, but no kick over, but finally found cause to be ign wires shorting, as when I repositioned them, it kicked right off!
Thanks to all again for the helpful info, Bob