Air Pump Test
- Detach air pump outlet hose from by-pass valve. Insert a "T" fitting and connect a pressure gauge. Plug opening.
- Be sure air pump belt tension is 3/4" when depressed midway on longest run. Start and run engine at 1500 RPM. Be sure choke is pushed fully in. Check pressure gauge. If reading is below 1.0 psi, replace air pump.