I have also got the same problem, my friend gave me it and every were said it was 100:1 fuel mix when that is not correct it is 50:1 if you read on the filler cap and on the body of the geni, when i was told it was 100:1 i thought that aint alot of oil this could be why the machine is surging, my fist guess is the crank seal leaking air as it isnt being lubricated anuf
did you eva sort your problem out if you did what did you find?
Danno
