The electric pump is under and in front of the fuel tank behind the seats, before the shut-off valve. The purpose of the electric fuel pump is to prime the fuel lines as well as a backup on take-off.
It's good practice to turn the main switch and fuel pump on while doing the DI. You should hear it click until the line is primed. If it doesn't stop clicking, you have a fuel leak or a faulty needle and seat in one of the carbys. You can also disconnect the fuel line at the mechanical pump and measure how long the electric pump takes to fill a one litre bottle. The minimum flow rate is listed in the maintenance manual. If there's crap in the tank or wrong type of fuel valve has been fitted (NOT ball valve type) it won't supply the minimum amount. Cheers, Greg. Greg Wilson ---- On Mon, 11 Nov 2019 22:01:32 +1100 Jarek Steliga <mailto:[email protected]> wrote ---- Hi, How to make sure the pump functions properly? Does it produce some audible buzz sound when switched on? When I disconnected the fuel hose at the carburetor and switched the pump on, no fuel flowed. Is this pump just a back up in case the main engine driven pump fails during take off / landing? What is the electrical pump's location relative to the shut off valve? As per diagram between the fuel shut off valve and the carb? Tank you in anticipation Regards Jarek
