Garden Tractors - 616 Running hot

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616 Running hot

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=88845
Printed Date: 01 Nov 2024 at 3:20am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 616 Running hot

Posted By: Tom6070
Subject: 616 Running hot
Date Posted: 29 Apr 2014 at 9:27pm

Hey Guys,
My 616 has a good running original Onan engine. It seems to be running a little hot. Backfires when shutting it off. Anybody have any ideas?
I plan on replacing the engine in a few years. Thanks, Tom

Replies:

Posted By: Tracy Martin TN
Date Posted: 29 Apr 2014 at 9:40pm

Carbon buildup on the heads probably.Might have timing off slightly and cooling fins clogged up. HTH Tracy

Posted By: Toscani NE SD
Date Posted: 30 Apr 2014 at 6:36pm

mines done it since I bought it in 2000,i'm thinking carbon to but still have never had head off,maybe this year

Posted By: D-17_Dave
Date Posted: 07 May 2014 at 12:10am

Back firing isn't really a running hot issue. Any little flake of carbon or oil residue buildup can cause this. A lean carb will mare it pop and backfire while lowering throttle or at shutdown. Btw, a lean carb will also make it run above normal temp.

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Yea, I can fix that.....