This is a Shindaiwa 25cc fourstroke . This engine uses oil/gas premix.There is no oil reservoir so engine can be mounted in any position. Carb has been changed to an adjustable Walbro 2stroke carb.The engine is very quiet even with just a straight pipe. Starts easy and has that nice 4stroke sound. Revs to approximately 7400 with a 16x8 prop. Engine is new and ready to mount. Prop hub is included but is not shown-----------PAYPAL----ADD 3.5% TO TOTAL-----------