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Allis Chalmers Discussion Forum

How do you adjust carburetor on a D-15?

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11-10-2003 08:44:36

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I have D-15 Series II that I had to take the carburetor apart because it was all varnished. After cleaning everything it still was not running to good. So, I tried adjusting the high speed idle screw (one on the bottom side) ran a little better but still not good and would stall. So, I tried the top idle screw. Well now I have totally messed it up!! I tried to do the adjustment the way the manual said but it did not work good. Is there another way to do the adjustment on it?? and/or if any one could tell me how to adjust it so it will run good again?? Thank for any and all help!!


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11-10-2003 09:13:37

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 Re: How do you adjust carburetor on a D-15? in reply to Scott, 11-10-2003 08:44:36  
If memory serves me right the top screw should be at about 3/4 out from bottom and the bottom screw at about 1,1/2 out this is just a starting point. But by what you have said it sounds like you still have a clog in the carb. When you took the carb apart did you pull the tupe that sits a about a 45 degree angle out and make sure the pin holes in it where open, if not that is probably where your problem is. Hope this helps

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11-10-2003 15:13:45

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 Re: Re: How do you adjust carburetor on a D-15? in reply to old, 11-10-2003 09:13:37  
Old and Dick L, No i did not pull a tupe out. I did not think that would come out. I will have to take it apart again and see. Thank you for the info.

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11-10-2003 15:40:36

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 Re: Re: Re: How do you adjust carburetor on a D-15 in reply to Scott, 11-10-2003 15:13:45  
Be careful when you do they brake easy. I jsu did one on a Massey super 90 the other day and the thing broke and I had to make a tool just the get the end out if it. If that does happen to you send me an e-mail and I'll tell you how to make the tool.

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Dick L

11-10-2003 12:25:16

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 Re: Re: How do you adjust carburetor on a D-15? in reply to old, 11-10-2003 09:13:37  
What old said and if you didn't take the seat out where the power neddle seats, you could still have crud behind or even in it.

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