ORIGINAL: rc bugman
It all depends on which ignition you have. If it is the newest version, then it can be run on a higher voltage. If it is the older versions, they come in 2 voltages which is 4.8 or the ones marked 4.8 with a blue dot. The blue dot older ignition will tolerate a fully charged 5 cell nicad or Nimh which is around 6.8 volts but the voltage drops fast when the battery is used.
The way to tell is to look at the engine. If you have one magnet on the hub and a large size sensor, you have the older ignitions. If you have 2 magnets on the hub and a small sensor, you have the new version of ignition.
Hope this helps
Elson
Thanks, Elson. My ignition pickup has two magnets. Also, the module box has four wires plus the spark plug wires. One for battery, one for the mag pickup, one for a tach and one for the little LED. I think it is of the newer version and can be used with 6.6 volts even though it is clearly marked 4.8 volts. I'm recalling from memory, but I seem to remember Bobby Wilson, Cactus Aviation, telling me that a couple of years ago.
Thanks,
Hose A
