Zenith over flow
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=209938
Printed Date: 01 Feb 2026 at 4:17pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Zenith over flow
Posted By: 3rd generation
Subject: Zenith over flow
Date Posted: 01 Feb 2026 at 1:39pm
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Allis C. I’ve tried it all. Carb has been cleaned with Berryman cleaner. The body also soaked in evaporust. Added inline fuel filter. Float height is good and floats do not hang up on side wall. New gasket under float needle seat body. I even removed the wire clip between the float and float needle. Tried different needles. Only thing left is buy several needles and seats in hopes I get a good match. I’ve read the aftermarket carbs have poor performance. Is a Marvel carb an option? |
Replies:
Posted By: HudCo
Date Posted: 01 Feb 2026 at 2:24pm
| does the float leak? boil it to see if it bubbles or hisses |
Posted By: 3rd generation
Date Posted: 01 Feb 2026 at 2:34pm
| No I checked that also. If I blow into an empty carb bowl it holds holding upside down. As soon as it overflows I disconnect fuel line from carb and attach a hose and blow it appears to hold but under gravity feed it overflows as soon as the bowl fills up with fuel valve open. I measured the original needle to be a few thousands larger than the new needle thinking it gets kicked to side of dead center into seat hole. Sad because this tractor has been completely taken apart and overhauled from lower drive to engine. |
Posted By: Les Kerf
Date Posted: 01 Feb 2026 at 3:41pm
Methinks the float doesn't float enough
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3rd generation wrote: