Chosen Solution
I’m looking for what the valve setting spec are on a 2003 Model 31C777, Type 0173E1 (17 Hp) motor.
Jeff, double check your numbers. I believe it should be 31C777-0173-E1 which makes your engine a MODEL 310000 VERTICAL SERIES Valve Clearance – Intake .003 - .005 in. (.08 - .13 mm) Valve Clearance – Exhaust .005 - .007 in. (.13 - .18 mm) Hope this helps, good luck
