Craftsman Lawn Vacuum starts, then quits

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  #1  
Old 11-01-12, 12:46 PM
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Craftsman Lawn Vacuum starts, then quits

Hi there, I appreciate it if anyone can give me some help.

I have a push-style chipper/shredder lawn vac 4.5 horse power. It will start after I prime it with gas, then after that initial priming wears off in a few seconds, it dies.

I tried taking the carb arpart to the best of my skill level and cleaning it. I also detached the fuel line and it seems to be flowing. I drained the gas and put new gas back in.. and even tried running with the gas cap off.. all to no avail.

When I take the air cleaner out, I can spray gum out into it and as it's dying it will suddenly pick up again for a second or two, then die again.

Anyone have any other ideas? I'm only so-so with engines.
 
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Old 11-01-12, 02:46 PM
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Please put the Model number and Type number on here if the engine is a Briggs, if it is a Tecumseh just need model number. This will see what kind of engine and or Carburetor the engine has.
 
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Old 11-01-12, 03:42 PM
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Thanks so much! (and sorry I didn't post that earlier).

It is a Tecumseh. The engine model number is: 123.014500

It also says "Engine family YTPXS.1951BB
 
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Old 11-01-12, 04:11 PM
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The bowl nut is the main jet on that carb, there are several holes in it, the tiny one near the top is the problem, I clean it with the wire from a twist tie, check to the pic below as reference. Have a good one. Geo

[ATTACH=CONFIG]4966[/ATTACH]
 
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Old 11-01-12, 04:18 PM
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That is so awesome.. thank you!
 

Last edited by nhjosh; 11-01-12 at 05:19 PM.
  #6  
Old 11-01-12, 05:04 PM
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Gunna go try it. I'll let ya know what happens.
 

Last edited by nhjosh; 11-01-12 at 05:20 PM.
  #7  
Old 11-01-12, 05:18 PM
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NOpe! Still doing the same thing even after I cleaned out that hole.

I discovered something new. If I keep pushing the primer, it will keep running. That makes me think there's some sort of fuel line problem, even though I removed the fuel line and gas passed right through.
 
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Old 11-01-12, 06:19 PM
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Did you clean ALL the holes in that piece? That is where the fuel flows through.
 
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Old 11-01-12, 06:40 PM
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Sorry Cheese, I should have said to clean all the holes in the bowl nut not just the tiny one, poor assumption on my part. Have a good one. Geo
 
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Old 11-01-12, 08:30 PM
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Have you replaced all the 2 o-rings that are on the main venturi tube? One is near the bottom jet and the other is at the top of the venturi tube. With the bowl nut out and the float bowl off push out the venturi tube, the lower o-ring will come out with the tube and the top o-ring you will have to dig it out with a pick. Replace them and make sure ALL holes on bowl nut are cleaned out and theis thing should run. Good luck.
 
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Old 11-02-12, 06:04 AM
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Woo-hoo! It worked! OK so I had cleaned the top hole and the two bottom ones. But I just took it off again and cleaned the TINY little hole that connects the top and bottom chamber and that did it! THANK YOU all so much for narrowing down where the problem was.
 
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