1-12EEMU00025GASOLINE (PETROL)If knocking or pinging occurs, use a differ-ent brand of gasoline or premium unlead-ed fuel. If unleaded gasoline is not avail-able, then leaded regular gasoline can beused.If leaded gasoline is usually used, enginevalves and related parts should beinspected after every 300 hours of opera-tion.Recommended gasoline:Regular unleaded gasoline with aminimum octane rating of 86(Pump Octane Number) = (R+M)/2EMU00027GasoholThere are two types of gasohol: gasoholcontaining ethanol and that containingmethanol. Gasohol containing ethanolcan be used if ethanol content does notexceed 10% and the fuel meets minimumoctane ratings. Gasohol containingmethanol is not recommended by Yama-ha because it can cause fuel system dam-age or engine performance problems.