Running an electric fuel pump
on a GM series Yanmar
is asking for a failure. The GM uses a mechanical diaphragm fuel
pump. These leak quite often. If you push fuel
through it the fuel can fill the crank case.
Hi NeverMonday, (great name wish i could get that kinda job ) thanks for your comments . sorry for the confusion---i do NOT have my electric diesel
pump wired into the fuel system for the yanmar
which indeed is a mechanical lift diaphragm
pump ( that seems to pump 1/4 teaspoon per stroke when you are trying to bleed the fuel system.... i have my diesel
pump wired to a removable board behind the engine
compartment to use as a polisher to push fuel from tank 1 to tank 2 and run it thru a 30 micron racor
, and also as an offshore
auxiliary jack pump to pump fuel from a portable tank into the fuel feed tube without slopping raw fuel all over the cockpit
.(stupid place for an inlet feed tube especially in 8 ft seas.) my electric jack pump wired to a board a very handy little thing to have onboard.
for purposes of getting better 'lift' out of the mechanical pump when i am priming the fuel system on the yanmar, i have installed a squeeze bulb after the racor and before the secondary small on-engine filter.. works like a charm.