I am about to buy a murray 12.5 hp Riding lawn mower, but the engine is blown. The thing is, i have have a perfectly fine engine with plety of torque, but it is a horizontal shaft. Could i still just remove the gas tank and mount it on its side? The carburetor would end up with the air intake at the top of the engine. The engine i have is almost the same as a honda 4 stroke.