Kohler PA-CH1000-3000 1-7-16" x 4-7-16" Crank Horizontal Shaft 37 HP Electric Start EngineKohler PA CH1000 3000 1 7 16" x 4 7 16" Crank Horizontal Shaft 37 HP Electric Start Engine You work your tail off 12+ hours a day. It's time to hold your engine to the same standard. With extended maintenance intervals and fuel efficient operation, KOHLER Command PRO engines work as hard as you do. Features: Integrated oil coolers extend oil change intervals and maintain low temperatures during the entire power rang High efficiency, heavy duty air