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Starting issues

A

Anonymous-0

Well-known Member
I converted a 100 from a 6 volt to 12 volt a couple of years ago and had no problems until late this summer when the engine would only fire after I released the starter. The problem got worse and then it would not start at all. Someone posted a few weeks ago with a similar problem and one of the suggested solutions was to put a diode in. Thinking that perhaps the diode that I had put in with the conversion had gone bad, I have replaced it, yet still cannot start. Do you think my problem is electrical or something else? Any solutions?
 
Do you have a multi-meter [preferably analog]? Connect it to the coil primary terminal which comes from the on-off switch & ground [frame]. See what the voltage does while cranking the engine. If it drops substantially, look for a bad switch or bad connection on a wire from the battery clear up to the coil/ distributor. We're assuming you've checked the points & condenser.
 
If it has a ballast resistor, jump it with a wire and start it. if it starts immediatly. replace the ballast resistor with a new one, they can get weak. Jim
 
If it has a ballast resistor and a 6 volt coil, replace them with a true 12 volt coil and NO ballast resistor. That's what I had to do on my 130 many years ago. Started fine in warm weather but would not start in cold weather.
 
I stuck a new resistor on it tonight and when I tried to start it, it didn't start and it looked like the resistor was smoking- my lighting was only fair- would it be maybe just a loose wire or indicative of something else? Thanks
 
first use of a resistor almost always causes some smoke. I think you said you changed the coil. So I assume it was a "for use with external resistor" coil. if not, it could be low on spark from the true 12v coil and a resistor.

Make sure the points are set at .020". Jim
 
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