Hey everyone, I just installed a Walbro FRB20 electrical fuel pump
on my Yanmar 2GM
. Replacing the original Walbro 6095 pump
that seemed to not be working anymore.
I was able to bleed the fuel
lines after a ton of effort to get her running with the new pump
installed. However, she eventually stalled out as fuel
seems to be moving too slow through the system. The pump is supposed to sense when fuel is needed and deliver at appropriate pressure and rate. Yet it really seems to barely be pumping much fuel at all.
Upon testing the pump disconnected from the engine
it is a minor spit of fuel that is pumped out every 5-6 seconds. So it is no surprise it takes forever for fuel just to get to the first bleed nut and eventually be able to get air out of the system, then start her up. But it does not seem to be a strong enough flow of fuel eventually leading to the engine
stalling. I am coming to this conclusion as after stalling the fuel lines on the engine are essentially empty and it takes forever to see fuel at the bleed nuts again.
My fuel system goes: Fuel Tank
500FG - Walbro FRB20 fuel pump
- Engine. The engine does still have the manual fuel pump on it.
The reason the electric
fuel pump is necessary is because the tank is so far away (6+ feet) and the level of rise is a solid few feet (~4).
So my question is did I buy the wrong fuel pump? Maybe I should have something with a higher flow rate / pressure to consistently feed fuel to the engine. This current
one does not seem to be doing the trick. The Walbro FRB20 minimum flow rate is apparently 125 liters per hour (33 gph). I highly doubt it is doing that though.
Any advice or similar stories is appreciated.