Farm Equipment - D17 carb adjustment

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D17 carb adjustment

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=25935
Printed Date: 25 Feb 2025 at 2:58pm
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Topic: D17 carb adjustment

Posted By: Chris (swIA)
Subject: D17 carb adjustment
Date Posted: 18 Feb 2011 at 6:49pm

I have having trouble adjusting the idle speed of my D17. I have books that list idle speed from 325, 400, and 575. What should I be shooting for? It seems that if I get below 500 rpms it dies. Adjusting the idle mixture screw doesn't seem to do anything. I assume that I have something plugging the idle circuit in the carb. Has anyone had this problem?

Replies:

Posted By: Brian G. NY
Date Posted: 18 Feb 2011 at 8:46pm

Yep,

I totally dismantled the carb, cleaned out all the tiny holes with tip cleaners and carb cleaner.

Then I blew out everything with compressed air and reassembled it.

Runs beautifully now.

Posted By: Dick L
Date Posted: 19 Feb 2011 at 5:34am

They have to be clean for sure but remember that the engine slow idle speed is set with the butterfly stop screw. The so called Idle screw (idle air fuel mixture screw) adjusts the fuel air mixture so the engine runs smooth at the stop screw setting. You can't get there adjusting one screw.

Posted By: MACK
Date Posted: 19 Feb 2011 at 7:07am

Throttle shaft may be worn causing the problem. MACK