Garden Tractors - Larger fuel tank for 620

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Larger fuel tank for 620

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=195465
Printed Date: 08 May 2024 at 1:59pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Larger fuel tank for 620

Posted By: BrianC
Subject: Larger fuel tank for 620
Date Posted: 31 May 2023 at 11:34am

620 with Onan CCKB. I keep running out of fuel. One task in particular, if I start out with full tank, I am on fumes and worried about driving back home on the road. Anyone ever make a larger fuel tank? Looks like the stock tank is maxed out on width (crosswise).

Fwd/aft length, the oil cooler is right there. I think the tank could have been taller?

I have already leaned out the main jet adjustment as much as I think is prudent.

I keep the blades sharp.

Are there things you can do to make the CCKB appreciably more fuel efficient?

Another question. How is fuel economy after a re-power with Briggs or Honda?

I have a modern 48" OHV machine with slightly smaller tank. Used

it a few times and can complete the job with plenty gas to spare. However, this

machine is 1/2 the weight. But I do need to run it longer to finish.

Thanks.

Replies:

Posted By: AC720Man
Date Posted: 05 Jun 2023 at 9:40pm

The factory tank is as large as it gets. The Onan loves fuel. If you have 3 pt make a simple rack that will hold a spare can of fuel to drop off at the work site. Easiest solution I have

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1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD