Piston Std / Kohler 47 874 01-SPack Size:1Gravely 040990, Kohler 47 874 01, Kohler 47 074 11, Kohler 47 874 01-SESF 163-356, Foley/Belsaw 5979372, Foley/PLP 163-356, Green Meadow P356, Laser 94229, NHC 266-8039, Prime Line 7-03811, Rotary 6745, Sunbelt SB-6745Gravely K241, K482 and M10; Kohler K241, K482 and M10Ethanol: Not compatible with greater than 10% ethanol fuel, Cylinder Bore Size: 3.251"