Walbro fuel pumps made in the Caribbean?

[mike lowary]

I’m refreshing the fuel pump assembly and I pulled my new walbro 521 out of the box and it sounds like a Maraca! I’m a little hesitant to put this in. I’m thinking I either got one of the super ultra rare small batch Caribbean made walbro fuel pumps, which would totally justify the maraca music I’m hearing, or I need to send this pump back. Anybody else used the Caribbean version pump?

 

[rb70383]

When the pump is in the frame under fuel with a new exhaust and ear plugs, it should sound great from my house.

I have never had a noisy walbro. Did you bench run it? Louder when ran dry?

 

[mike lowary]

Fresh out of the box, shake it back and forth and it sounds like there is bb or something loose in there. I did bench test it dry. It ran but sounded labored. But then I wondered if it sounded labored cause it’s never had fuel in it. I’m thinking at this point since getting to the fuel pump sucks I’ll just send it back for a replacement.

 

[Cooter]

Is the trouble of sending it back worth double the labor, or the worry?

Honestly my personal experience with replacement parts is down to a pathetic 80% of being good or right:down:

 

[34nineteen]

Don’t those rely on the fuel to act as a lubricant?

 

[mike lowary]

34:19, that’s what I thought too. Maybe once fuel is ran through it, it would sound correct. However it’s the nickel in a coffee can sound that has me concerned. Either way I’m waiting to here back from the seller. Got a wiring harness project I can work on while I wait.

 

[Cooter]

Don’t those rely on the fuel to act as a lubricant?

It does, but no. There should be nothing rattling in a centrifugal pump.

 

[rb70383]

Walbros are gerotors pumps.
Only thing that might rattle maybe the return pin on the top if it has one. Or a check ball on the inlet?

 

[Cooter]

Walbros are gerotors pumps.

Are they? My foggy brain remembered vanes on the rotor, not 2 gears? and I can only find an exploded view of the 521 chainsaw carb...lol.
No worries, You're probably right and I'm used to being wrong, and it really doesn't matter anyway The point is... it shouldn't rattle unless its a diaphragm 'rattler' pump, which it definitely is not. and not worth installing if it's making noise and worrying the OP.

The 521 that Buells use do have a spring loaded check ball in the inlet, but it better seal tighter than rattling!

 

[rb70383]

I cant find the source of course...
Did the walbro lift pump mod on a 2nd gen 24V.
Auto Performance Engineering

 

[34nineteen]

Just found this on Walbros site. If its on the internet, it must be true.

 

[Outlaw]

Interesting bullet points

 

[Cooter]

Thats a great info page! Holy crap thats funny

Seriously though, is that for the 521? I don't know what the diesel upgrade takes.

 

[34nineteen]

No, i just found this product info page and made the edit to help liven things up here.

 

[Cooter]

I even had to show Bubbles that. So funny:applause: