RE: Seagull's HARRIER 90,WHICH SERVOS & ENGINE
Pumped engines help in that pump keeps the flow to the engine remains constant no matter what the attitude of the airplane and fuel level in tank. However, the way I see it, the pump is another piece of equipment that may fail or get damaged. Even without the pump, the engine will remain reliable if its setup and run-in properly. The pump just becomes another thing to worry about
Ameyam