Hey Hot S
It sounds like you may not be getting full voltage (+12) to the coil during startup. After cleaning the plugs and checking your timing I would put a hot jumper wire to the coil. If you find the wire going from the dizy to the coil, the hot wire goes on the OTHER coil terminal. You do not want to keep this wire on for long when the motor is not cranking as it can burn up your points if you have them. If it starts try removing the hot jumper to see if it keeps running.
Keep at it.
Larry - Cleveland
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