Farm Equipment - XT Timing revisited

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XT Timing revisited

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=49018
Printed Date: 26 Aug 2025 at 8:47am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: XT Timing revisited

Posted By: captaindana
Subject: XT Timing revisited
Date Posted: 15 Apr 2012 at 6:30am

ood morning everyone. I am going to retime my XT and my Series III book says "26*BTDC, Current Pump w/Auto Advance 24* BTDC." My question is which setting to use with my 1970 rebuilt Roosa???? Help! I've had it set to 26* but...IDK what to do as when it works it shutters and dies and it just aint right. Whats auto advance? Should I try 24*?

Replies:

Posted By: DrAllis
Date Posted: 15 Apr 2012 at 6:57am

Timing ain't your problem. The auto-advance is an improvement Roosa-Master offered for better starting and less smoke at full throttle. It is easily distingushed if you see one with it and one without. It is located on the very bottom of the pump housing and makes the pump housing look pregnant and has an adjusting screw pointing right at you when standing alongside it.