Avenger 750 EFI Fuel Filter Replacement

[Rickb]

I just changed the small plastic fuel filter (not the large metal one after the pump) on my 2009 Avenger 750EFI and after putting the new one on the pump does not seem to be able to bring fuel thru the filter and on-wards into the pump and to the engine.

After replacing the filter i turned the key to the run position for a good 30 seconds without cranking and heard the pump but no fuel was visible thru the new clear filter. I then started the engine and it ran until fuel ran dry from the lines after the pump I guess.

Do I need to prime the system some how after replacing this filter???

Would appreciate your help with this.

[philipatmaxfour]

efi filter

I just changed the small plastic fuel filter (not the large metal one after the pump) on my 2009 Avenger 750EFI and after putting the new one on the pump does not seem to be able to bring fuel thru the filter and on-wards into the pump and to the engine.

After replacing the filter i turned the key to the run position for a good 30 seconds without cranking and heard the pump but no fuel was visible thru the new clear filter. I then started the engine and it ran until fuel ran dry from the lines after the pump I guess.

Do I need to prime the system some how after replacing this filter???

Would appreciate your help with this.

I had to replace both filters on my 2007 efi. The metal one was a ridiculous price but it worked. I blame ethanol gas and use hi test now?

[Rickb]

Thanks Philip - I will hunt down the EFI filter and see if that does it.....do I have to go to ARGO for this filter?? Is there another third party option out there FRAM/Napa/etc..???

[msafi65]

I have a napa # at the shop about 25$ from Argo list 95. Will post # when back. Check for a leak at pre filter connection. Any air leak will pick up air and no pressure. Was there a problem before changing filter?

[Rickb]

Awesome...thanks!

[msafi65]

Found filter # it's a 3310 NAPA. Test fuel pressure if possible. Spec is 39 psi +-3. They start to idle poor at 33-35 and just won't take any throttle at 30psi. I've had several defective pumps with low hour vehicles. Kohler # for pump is 24-393-52-S. Good luck

[Rickb]

Thanks msafi65 for all the helpful information!!......I'm still trying to sort all this out.....will let you know how it unfolds.

[Rock Doctor]

Pump is probably Air Locked. Just disconect the fuel line downstream of the pump, turn on the key, and let the pump draw fuel through the filter and discharge it into a bottle or can for a few seconds. Re connect the fuel line and you should be good to go.

RD

[Rickb]

Thanks RD.....I did that last night with a direct hose from the pump to the tank and the pump made noise but no fuel out the downstream end????

Do you think she's pooched??? A new pump costs a fortune....not sure why????

Cheers, Rick

[Rock Doctor]

Thanks RD.....I did that last night with a direct hose from the pump to the tank and the pump made noise but no fuel out the downstream end????

Do you think she's pooched??? A new pump costs a fortune....not sure why????

Cheers, Rick

Maybe......, or maybe the suction screen is plugged right off IN the tank. You could try pumping fuel from one pop bottle to another to confirm.
You can get a generic low pressure fuel pump from NAPA for quite a bit less than the Argo one. I don't have the part # handy, but it is mentioned a couple times in some older threads if you want to try searching for it.

Kyle

[ARGOJIM]

I don't think a low pressure pump will work on the EFI.

[Tomo]

hi
U can purchase an EFI fuel pump with similar/same specs and retro fit
40 psi is common
the flow rate should not be a problem [donot purchase a holley blue pump ha ha ha [way to big ]]
12volt
connections similar to original [or at least close so u can modify ]
U can purchase in tank or external types
eg 12v external inline with connections/flow/pressure of choice

tomo

[Rock Doctor]

I don't think a low pressure pump will work on the EFI.

Ooops, sorry. Forgot that I was discussing an Avenger.

RD

[Rickb]

Thanks guys.....I am trying to source a new fuel pump.....no problem finding the pumps, but it seems hard to find specs on them....ie. flow rate and psi.

Does the flow rate (gph) matter?

Does it have to be 40 psi, or just minimum 40 psi??? Will the in-line fuel regulator ensure that the output is adjusted to the proper psi?

Thx. Rick

[JohnF]

Yes, the flow rate matters. The specs for your engine will list both a pressure and a flow rate and from there we can determine a pump that will work. Check out how I did this for a Kawasaki in this post.

{EDIT}

Okay, now I know why you were asking that question. I found the service manual for the Kohler Aegis LH 775 engine and couldn't find a flow requirement anywhere in there. I guess they assume you'll just buy the fuel pump from them.

Anyway, the flow is a function of the fuel used up by the engine. The pump needs to flow enough so that the engine can take what it needs and the regulator can maintain 39 PSI. The HP of that engine is a tiny bit more than the HP rating of mine (which did have a flow metric listed) so if we assume, say, 40GPH at 39PSI for yours...

gsl391-psi.jpg

I would guess that the Walbro GSL391 would probably work. No guarantees. I would personally try and track down the real flow rate to be sure. Of course Walbro says that this is enough pump for 350+ HP so there probably isn't anything to worry about there. And there's more - the flow rate I have is from the service manual and engineers usually list here a value that is in excess of the actual consumption of the engine so you might easily get by with the GSL393 (like I have) which will run 40PSI at less than 5 amps where the GSL391 shows 40PSI at 6+ amps.

Walbro inlines

For me, the Kawasaki fuel pump was so expensive that I could be wrong twice and still be money ahead. I see that at ArgoParts.com the Kohler pump is $212 so it looks like you get to be wrong once.