Larger fuel tank for 620

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    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.

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BrianC Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 16 Jun 2011 Location: New York Points: 1613	Post Options Post Reply Quote BrianC Report Post Thanks(0) Quote Reply Topic: Larger fuel tank for 620 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.

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AC720Man Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 10 Oct 2016 Location: Shenandoah, Va Points: 4635	Post Options Post Reply Quote AC720Man Report Post Thanks(0) Quote Reply 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
	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