The main reason is for starting. You still have 2 fuel solenoids. One is for the beginning of the start and the main fuel valve opens at switch over. Also it helps keep the prime to the pump when you shut it down.
Originally Posted by
Vettster
Just wondering what its real purpose is? When the engine is not running, the fuel pump is not active. Also we shut off the valve. If the plane goes into fail-safe the pump stops working. When the engine is running.. all it does is stay in the open position.
Many of the Propane users(my self included) dont use the Gas Solenoid anymore.
Do we really need the Fuel Solenoid?