In Reply to: Another 641 fuel valve replacement posted by Mike in Michigan on December 22, 2019 at 21:40:55:
I often thought about replacing my dad's 640's gas tank with a Jubilee/600 series replacement tank found on Ebay. Having replaced the shutoff value on his tractor 3 times. The Jube/600 series tanks have an option to use the existing spot for the shut off value in the center of the tank, or the spot where the Jubilee's sediment bowl was mounted near the side of the tank. You could just put a sediment bowl there, reroute the gas line and remove the sediment bowl that was directly mounted to the end of the carb.
I often wondering why they changed the position of the shut off value on the 600 series tank. Too much of a pain to get to it.