Farm Equipment - Allis B starting

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Allis B starting

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=206372
Printed Date: 26 Jul 2025 at 4:31am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Allis B starting

Posted By: Brinky
Subject: Allis B starting
Date Posted: 20 Apr 2025 at 8:41am

Hi all,
Quick update, I have installed a starter motor, put a six volt solenoid on it and a stud so I now use a push button to start instead of that horrible mechanical switch. I’ve had the magneto rebuilt. The carb was put on new by the previous owner.
I’ve only managed to start her once since the rebuilt magneto was put on and the timing checked.
I thought I’d take the carb off and clean it out, when I did the two inch pipe from the air filter was full of petrol. Surely that’s not right and what would be causing it ?
Any other advice on starting issues would be greatly appreciated
Thanks

Replies:

Posted By: steve(ill)
Date Posted: 20 Apr 2025 at 8:47am

if the FLOAT sticks in the carb, or the NEEDLE VALVE does not seat properly, then the bowl will OVERFLOW and run into the tube from the air cleaner.

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Like them all, but love the "B"s.

Posted By: Les Kerf
Date Posted: 20 Apr 2025 at 10:39am

As Steve noted above, the float/needle obviously is leaking. Once that is fixed, my Model C much prefers having the throttle opened only about one or two notches above minimum idle setting.

Posted By: jvin248
Date Posted: 20 Apr 2025 at 3:41pm

Verify the float is floating not filled with fuel. Also the float is set right (bend float arms). Needle and needle seat are clean and not sticking.

No gummy ethanol fuel in the tank. Find nonethanol or recreation fuel to use as the last tank in the fall or all the time. Fuel additives are a waste of time and don't protect you. It's ok if running everyday with new fuel every week but any sitting it draws moisture and gets jelly like.