Ok, H4 mags with serial numbers ending with a "D" are for the gas start diesels. They are counter clockwise rotation.
You can also reverse them to run clockwise. Remove impulse unit. reverse the pawl arms. Pull the pawl stop pin, install it on the other side. reinstall impulse. Then disaseemble rotor. change timing on it to the "R" mark. resassemble.
Good to go.
However, you are better served to sell the diesel H4 to someone looking for one, and buy a gasoline H4. IMHO.
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