HI .CHECK YOUR REEDS IF THEY ARE OPEN A LITTLE IT WILL BE HARD TO START. I RUN ALCOHOL AND IT IS HARD TO START. NEVER HIT THE GAS TRY THAT.MERAL

 

I like badchads idea. The primary, or pickup, or both coils could have a few shorted windings, thereby reducing the effectivness of the magneto by making the coils smaller. Smaller coil equals less produced voltage. That could explain your intermittent on/off sparks.

Send me a PM if your still in the dark and I'll send you the electrical system spec's if you need them. Ill scan em out of the manual or something.

 

i did a test with a digital OHM reader. looks to be the pickup coil is gone. i should have it done by tuesday and will let you guys know.