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Discussion Starter · #1 ·
So I've been tinkering with my new '72 Suburban. When I first got it, it wasn't running right. I took the carb off for a cleaning and what I found was a LOT of rust in the bowl. :fing20: So, I cleaned everything out a couple of times and reassembled. Now, I can get it to "sort of" run (still needs choke and won't even come close to idling), but now, when it is running, it's pouring fuel out of the little hole on the face of the fuel pump (side of the pump opposite the carb). What should I be looking for causing the pump to gush fuel like this? The float height seems to be right and the needle is opening/closing fuel flow properly. Any ideas pointing me in the right direction?
 

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How far did you take the carb apart ? Did you remove the main nosal ? Do you have the Tecumseh manual that is on this site ?
 

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u sure the floats shutting off? the over flow for the bowl is on the opposite side of pump if I remember right, and if it wont run right removing the center nozzle causes that...unless u install new one.....ive had the floats shut off when blowing into bowl, but once fuel is put to it it wont cause theirs a small hole in float and it wont float, might check that....
 

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chuck the pump into the woods.
 

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and if it wont run right removing the center nozzle causes that...unless u install new one.....
That's why I asked, I was thinking maybe he did remove it not knowing you need a new one if removed.

Chucking the pump is ok also. They gravity feed ok most of the time.
 

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So little time.....
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Discussion Starter · #7 ·
Thanks for all the replies. I didn't remove the main nozzle; I know that's a "no no" and I don't think I could even if I wanted to since it looks like someone stripped the slot in it anyway. Looks like its a goner as far as that goes. As far as the fuel pump goes, yeah, I might just chuck the stupid thing and let it feed without it.

A buddy of mine who used to be into Sears stuff before his divorce gave me two spare LME 34 carbs, both in good condition so if I can't get this carb to run right, at least I can fall back on one of the others.

Any chance of getting the existing one going even though the main jet may never come out now? I know I've had some luck with one-piece Briggs flo-jets with the same issue, but from what I've read this carb is a whole different pain in the arse animal.
 

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Biggest kick in the shorts about the LME34's is the idle circuit.Took me awhile to warm up to the idea that there are engineers out there with that type of hate for us.If it's not clean--you'll never hear it idle without the choke.After three all out attemps-the first one I fixed purred like a kitten.Since then I fixed a bunch of 'em.I would sit on those spares you have,their like hens teeth.
 

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Sounds like you have a plugged main jet. If you can't remove it, you can try to clean it with soft wire, such as a copper strand, but chances are you need to remove it to clean it and the passages.
 

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I have had "some" success removing stuck jets from carburetors using a left hand drill bit. Push hard so the bit grabs and doesn't have a chance to drill thru. It works better if the bit is sharpened with excessive rake and clearance to make it bite quicker.

Mike
 

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im a particular about keeping the pumps...it seems the float is fully shutting off to me...and also thats its got dirt in the jets....Ive never had a factory vaccum pump, be able to pump to much unless i had a carb problem...
 

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So little time.....
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Discussion Starter · #12 ·
im a particular about keeping the pumps...it seems the float is fully shutting off to me...and also thats its got dirt in the jets....Ive never had a factory vaccum pump, be able to pump to much unless i had a carb problem...
I think that's what it has to be. I took one of my spare carbs out and just for a laugh tried to blow into the fuel inlet. It's MUCH easier to blow into the "new" carb than it is the one that came on the tractor so I'm guessing that's got to be the problem; fuel pump is flooding out due to the carb restricting the fuel flow coming into it. I'll pull it apart yet again and see if I can find what's causing it; maybe I boogered up the seat when I installed it.

I'll give the left-hand drill bit idea a try to see if I can get the darned thing out. I do have a service nozzle that I can install if I wind up getting the old one out.
 
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