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Allis Chalmers Discussion Forum
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WD45 Carb problems

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Jim's57WD45(TX)

03-03-2006 09:25:29




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My old 45 has been sitting for a few months while I was working on rstoring another old *n I have. I went to start the 45 and found that I had forgot to put some Sta-Bil in the tank and the gas smeeled about like turpentine. I pulled, dipped and put a kit in the carb (it needed it anyway), drained the tank, changed the inline fuel filter and put fresh gas in it. She fired right up. The problem is that it won't run unless the choke butterfly is nearly all the way closed. When I open the choke butterfly, even as much as 25% open, it backfires and dies (really lean). I can't find any intake or other air leaks that would cause this. Anyone have any thoughts on this? Thanks in advance-

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Texas Denny

03-03-2006 21:10:52




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 Re: WD45 Carb problems in reply to Jim's57WD45(TX), 03-03-2006 09:25:29  
If your tank smelled that bad, you probably have a build up inside the channels in the carb. The most likely one is the tube that goes from the center of the carb throat to the power adjustment needle. If this is obstructed, the carb won't put gas in the airstream. And it is really hard to clean if it gets the gas gunk in there that looks like asphault. Putting in a kit won't address these problems in the channels.

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old

03-03-2006 11:44:53




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 Re: WD45 Carb problems in reply to Jim's57WD45(TX), 03-03-2006 09:25:29  
Well if you have a good flow of gas to the carb, which you need to check first by pulling the drain plug from the bottom of the carb. If you have a good steady flow from the plug then you have missed something in the main jet area of the carb. You might try pulling the main jet out and see if you get a good flow of gas from there also before you go back in to the carb. I'll almost bet you have some junk in the main jet area.

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Jim's57WD45(TX)

03-03-2006 12:45:25




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 Re: WD45 Carb problems in reply to old, 03-03-2006 11:44:53  
I'll check both of those. Thanks Old!



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