Piston ring set 77mm for GX270 GX-270 270CC 9HP 4 stroke motor 3.5KW generator water pump kolben rings 3689585 This piston ring set is designed for use with 77mm cylinder bores and fits GX270 GX-270 270CC 9HP 4 stroke engines.It is compatible with generator and water pump applications requiring a 3.5KW output.The set includes three rings: compression ring, second compression ring, and oil control ring.These rings are engineered to maintain proper compression, reduce oil consumption, and smooth engine.Suitable for replacement during engine rebuilds or maintenance of small industrial motors.3689585.