What's necessary to convert electrical system from 6 volt to 12 volt . And which parts are used, and parts aren't in the conversion Can you jump start the system with a 12 volt battery I'm starting a Cub that hasn't run in over 3 years
Wed May 05, 2004 10:26 am
Larry, basically you'll need a 12 volt generator / voltage regulator or an alternator. Also a ballast resistor for the ignition coil plus 12 volt light bulbs for the lights. You can keep the 6 volt starter. Just remember not to crank the engine for long periods. If you use an alternator, you will need a load to excite the alternator - usually a small light bulb. You might want to view some of the conversion diagrams at the link:
My question as usual is why? 6 volt system works great. Or is it the cost? Are you needing to have the generator, mag or cut-out replaced or rebuilt? As I continue with Jethro's restore, I am changing him back from the 12 volt conversion to the 6 volt original. Yust me dos centavos....
Wed May 05, 2004 5:43 pm
You mentioned a ballast resistor for the six volt coil. Is this just to keep the old coil in place and save $$$? Or, is there a specific reason for leaving the 6V coil? I put a 12V coil on my '49 and did away with the ballast resistor. Been running good. So far!!
Wed May 05, 2004 6:15 pm
Either way will work. If the existing coil is good, the ballast resistor is a cheap alternative to buying a new 12 volt coil.