Farm Equipment - Time a D17

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Time a D17

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=130328
Printed Date: 01 Jun 2025 at 4:00am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Time a D17

Posted By: cnafarms
Subject: Time a D17
Date Posted: 22 Oct 2016 at 7:02pm

Ok so I need to know the correct way to time a d17. In the inspection port on the side of the tractor when number 1 plug fires should the F-25 that's on the flywheel be visible in that inspection port. I'm guessing yes. The only problem is with mine that once a load is put on the engine it starts to miss loses power. Do also when you time it is it at idle or full throttle. I've read both looking this up on different websites some say at idle and some say full throttle. Any input is appreciated.
Thanks
Chris

Replies:

Posted By: DrAllis
Date Posted: 22 Oct 2016 at 7:30pm

WIDE OPEN....FULL THROTTLE....F-25.

Posted By: WF owner
Date Posted: 23 Oct 2016 at 6:28am

Is the mechanical advance working? They tend to get neglected and set up on these old tractors.

Posted By: LeonR2013
Date Posted: 23 Oct 2016 at 6:57am

Wouldn't checking your timing at idle and wide open tell you if the advance was working?

Posted By: DrAllis
Date Posted: 23 Oct 2016 at 7:47am

Correct. At high idle it needs to be F-25. At a very low idle (400 RPM) it should be close to TDC.