Hi Jeffrey, here is an interesting forum with reference to: JAP engine, how to identify it? Click HERE You will see a post there that references the magneto model number to the model of the engine.
Once you correctly identify the model, you can download a manual free here.... HERE Hoping this helps.
Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member. Kindest Regards, Darryl