ballast resistor problem
An easy test of the ballast is bring a jumper wire with alligator clips on the ends, next time it doesn't start clip one lead to coil positive the other to battery positive. Then try starting.
If it starts and runs pull the leads off, if it continues running it's not the ballast, but it might be the ignition 2 cir not providing anything or enough to the coil during startup to get it to fire.
Check that the resister values are correct for your application. And you have it hooked up correctly
An easy test of the ballast is bring a jumper wire with alligator clips on the ends, next time it doesn't start clip one lead to coil positive the other to battery positive. Then try starting.
If it starts and runs pull the leads off, if it continues running it's not the ballast, but it might be the ignition 2 cir not providing anything or enough to the coil during startup to get it to fire.
Check that the resister values are correct for your application. And you have it hooked up correctly