Kohler Command Single CV490S-27508 & CV492S-27506. Kohler Courage SV490-0004. Briggs Intek Single 31P777-0299, 31P777-0371, & 31P977-0575. These engines have a 1”x3-5/32” shaft on them. If you have a Briggs engine and you have an electric clutch you will have to use the alternator and regulator off of your old engine or buy an engine with a 9 amp alternator or larger. If you have a Kohler engine with a fuel pump, you will have to purchase an engine with a fuel pump. If you have a Briggs Intek with a fuel pump on your engine you will need to buy an engine with a fuel pump or use the fuel pump off of your engine.
Additional Info
You must stay with the same brand and model design as what is currently on your tractor, you cannot switch without major problems