: : due to oil over flow one of the spark plugs goes : out hence the pickup also goes down . there are : 3 cylinders it will work on only two cylinders? Why don’t you trade it for a harmomica, and go over to that forum? In the meantime, you realize that you have a problem with one of your oil rings on the piston. Start by using a thicker oil, if you are in a warm climate. The condition you describe is oil fouling, not overflow. It is common, and it is a serious matter. You also must put a hotter range spark plug to burn off some of the oil, during combustion. However it will still foul. But get the hotter plug. Essential. So, it is not okay to run on 2 cylinders. It’s more than just a worry over loss of pickup or acceleration, but you will eventually clog the exhaust valves, and maybe even plug the exhaust manifold. Temperature throughout the engine will be affected. You’ve got trouble. Get the harmonica while you still can.