Farm Equipment - Allis B

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Allis B

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=34674
Printed Date: 06 Oct 2025 at 10:33am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Allis B

Posted By: Larry B
Subject: Allis B
Date Posted: 29 Jul 2011 at 10:51am

I have a B crank start. Wondering if low compression would make it not crank start but pull it 10ft. and will run. Checked compression and is 60lbs in all cylinders.Idon't think that is enough.

Replies:

Posted By: Bob D. (La)
Date Posted: 29 Jul 2011 at 11:28am

60 lbs is low. When checking compression did you open throttle wide open and disconnect air cleaner as well as have all plugs removed.. If you did, it would seem to me an overhaul is needed.

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When you find yourself in a hole,PUT DOWN THE SHOVEL!!!

Posted By: Gerald J.
Date Posted: 29 Jul 2011 at 11:29am

Check the impulse start mechanism in the magneto. Its there for hand cranking. If its not working, hand cranking won't work.

Gerald J.

Posted By: CAL(KS)
Date Posted: 29 Jul 2011 at 11:34am

Sounds like you need a stronger arm, LOL good luck

Posted By: Dick L
Date Posted: 29 Jul 2011 at 11:36am

What Gerald said! you need to hear the impulse snap once every revolution of the crank.

It should start quite well at 60 pounds compression with some choke on. It will not have the pulling power that low as it would at 90 or above.