04-13-2018, 11:58 AM
If your used engine came with a supply of castor, you need to make sure whether the carb is a stock gasoline carb, or has been drilled for alcohol. Castor is generally used as a lube when alky is the fuel. If your engine has a gas carb, you won't need castor. A good mineral 2 cycle oil, or a good synthetic lube is all that's needed. Ted