The electric choke system is a heater and switch assembly sealed within the choke housing. When the engine is running and the engine oil pressure is 4 psi (27 kPa) or above, the contacts in the oil pressure switch closes and feed current to the automatic choke system to open the choke and keep it open.
The choke assembly must never be immersed in fluid as damage to the internal switch and heater assembly will result.
- Disconnect the electrical lead from choke heater assembly.
- Connect direct battery voltage to choke heater connection.
- The choke valve should reach the open position within five minutes.