armody

Two things to make sure, do not have a metal to metal conection from the throttle arm to the pushrod, it could cause interference and loss of signal make sure you use a plastic connector with a plastic pin.

If your engine is digesting sand it will not last long may be an idea to put a filter on the carberetor, the car boys use these a lot so they are normally available from your Local Hobby Store (LHS).

Let me know the results?

Mike