I change my filters every year. Just fill them with fuel before you put them back together.I guess you didn't have to change fuel filters very often
I know their are people on here that are running pumps in series just trying to figure out a part number before I just go buy one and play with it.
Well I guess you've had better luck than me not getting air into the high-pressure side. You can draw fuel through an electric pump when it's off, as long as you get one designed to not block the flow, which the facet pump above meets the criteria for.I change my filters every year. Just fill them with fuel before you put them back together.
The problem with running them in series is that unless both are running, the one stopped can block the fuel flow. Just connect them in parallel and either can supply the fuel.
I just installed this with a new Racor 500:
Configuration is tank -> Racor filter -> Walbro -> engine (yanmar 2gm20f).
I turned the pump on and the Racor filled up in under 5 seconds.
I ran the pump for an hour (installed fuel polishing valves and T as well) and got about 7 oz of water out.
Switched it over to the engine, changed the primary filter and bled the line in a few seconds with just a quick flick of power to the pump.
The engine draws fuel just fine with the pump off (it is designed for flow thru).
Lots of lurking here led to this system which is simple yet very functional. Thanks to everyone who provided all the little bits and pieces of info.