Kohler PA-CH395-3038 Engine 22 mm x 2" Crank Horizontal Shaft Electric Start 9.5 HPKohler PA CH395 3038 Engine 22 mm x 2" Crank Horizontal Shaft Electric Start 9. 5 HP This is what it takes to be a PRO. Performance driven features like a heavy duty air cleaner, forged steel crankshaft, electronic ignition and cast iron cylinder liner. KOHLER Command PRO is the standard for professional grade power and performance. Features: Quad Clean all season four stage cyclonic air filter effective engine protection for tough and dirty