Garden Tractors - AC 720 Zenith Carb

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AC 720 Zenith Carb

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Garden Tractors
Forum Description: A great place to discuss the Simplicity and Allis Chalmers Garden Models
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=161829
Printed Date: 22 Feb 2025 at 9:37am
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Topic: AC 720 Zenith Carb

Posted By: dertz19
Subject: AC 720 Zenith Carb
Date Posted: 11 Jun 2019 at 10:30am

I need to rebuild or replace the carb- looks like the model # is 13262, is that correct? Any recommendations on source for the rebuild and gasket kits? What about if I decide to get a whole new carb- are they available?

Replies:

Posted By: IBWD MIke
Date Posted: 12 Jun 2019 at 8:51am

That's the model no. I have written down for mine. Need to do the same as you. There are kits available, none too cheap. Mcdonaldcarb.com has about the best deal I've found, not sure on the completeness of the kit.

Keep us updated on your progress.

Posted By: dertz19
Date Posted: 27 Jun 2019 at 10:27am

Update: I wound up getting the carb rebuild kit from Sandy Lake. It was probably more $ than what I may have been able to find elsewhere, but I wanted to make sure I had the right one. I also bought new points and condensor (got that on Amazon). I took it all over to my local country mechanic, and it looks like the root of my problem (inconsisten performance and backfiring) is an electric fuel pump the previous owner installed (an Edelbrock) that is pumping way too much fuel into the carb. So right now I'm ordering a fuel pump rebuild kit from onanparts.com and going that route (about $100). My mechanic said that between the bad points, and the carb issue, he can't believe it was even running.

Posted By: tadams(OH)
Date Posted: 28 Jun 2019 at 1:32pm

Make sure the fuel return line is on at the carb to return extra fuel to the tank