Farm Equipment - Timing, marks use F25 degree or otherline on fly

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Timing, marks use F25 degree or otherline on fly

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=7641
Printed Date: 17 Jan 2025 at 10:51pm
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Topic: Timing, marks use F25 degree or otherline on fly

Posted By: boscoe
Subject: Timing, marks use F25 degree or otherline on fly
Date Posted: 04 Feb 2010 at 10:51pm

My flywheel has a line marked on it ,also a line with the letter F and 25 degree sign. Which do you use to time engine, what is each line for? Which is TDC? It is on a D17 1959 model thanks.

Replies:

Posted By: DrAllis
Date Posted: 04 Feb 2010 at 10:54pm

Wide open throttle time at the "F-25" mark with a timing light.

Posted By: boscoe
Date Posted: 04 Feb 2010 at 11:05pm

I had it running well and it wont start at all, power to everything, coil, points, gets gas. So with engine off do I start at the one other line which is TDC? #1cyl pressure pushing out finger, line is in sight hole ,line up rotor with #1 rotor post , tighten back down, points about ready to open,should start ?. I have a spray coupe with a volkswagon engine and if the points arent exact it WILL NOT RUN AT ALL. Maybe these tractors are point sensative? what am I doing wrong?

Posted By: DrAllis
Date Posted: 04 Feb 2010 at 11:09pm

The blank "line" is TDC..........F-25 is 25 degrees before TDC. Points to be set at .020".

Posted By: boscoe
Date Posted: 04 Feb 2010 at 11:12pm

Thank you Doc.

Posted By: boscoe
Date Posted: 05 Feb 2010 at 3:29pm

I got it running again today, I re-timed it and it started but kinda rough so I loosened the dist while running and turned counter clockwise and it now literally purrrs, It sounds great. I hope that doesnt hurt it to adjust when running.