Strange 460 gas problem????

jstpa · Jun 12, 2008

Hey guys, We are having an intermittent problem on a 460 gas tractor. While raking hay the tractor just shuts off, Pull the choke and it will usually refire instantly and go again, sometimes for hours. Last night just moving the tractor around it shut off, could not get it to refire w/ choke so we pulled the hose loose from the carb to the oil bath,put it back on before we turned it over, then cranked it and it fired right up. The oil bath was taken apart and cleaned out a couple months ago, and the rubber hoses both appear to be clean along with the metal hose going from the oil bath to the carb. Does anybody have any suggestions what could be going on, or what else we could check. Thank you, jstpa

Bob · Jun 12, 2008

Have you drained the carburetor through the bowl drain?

ASSUMING you are not intermittantly losing spark, you have the classic symptoms of a little water or debris in the bottom of the carb, in the main jet area.

Allan in NE · Jun 12, 2008

I'd suspect that old ignition switch.

Allan

rustyfarmall · Jun 12, 2008

Possibly a "floater" in the gas tank. Every so often it will "float" over the fuel outlet and block it.

jhilyer · Jun 12, 2008

Not that they're the same, but my Super C did this kind of thing - does the fuel inlet to your carb have a screen filter? Becasue mine was plugged up. Leave it sit, and enough gas would get though to run for a little while, but then it would shut off again. Cleaned it and the problem went away.

mkirsch · Jun 12, 2008

If it were ignition, pulling the choke would have no effect.

It's definitely not the air cleaner. Clogging that air cleaner would take about 200 years of operation in extremely dusty conditions. There are instances where "mud daubers" (paper wasps?) have built nests in them, but if the "mushroom cap" on the hood is in good condition, the mud daubers can't get in.

This is definitely a fuel flow problem. There's crud in the tank, or crud in the sediment bowl under the tank, or crud in the line, or crud in the carburetor bowl, or the needle/float is sticking.

Anonymous-0 · Jun 12, 2008

If you can rig a voltmeter somewhere at the dashboard area, connect a temporary wire with alligator clips to the coil low voltage terminal & see what the voltage reads when you have the engine fail. Our SMTA had a bad wire from the ign. switch to the coil. A voltmeter check will confirm this.

armand tatro · Jun 12, 2008

Speaking of "floaters" does your tractor have or has ever had a gas cap fuel gauage with the cork float? If so inspect the float for missing pieces of cork and look inside the tank for pieces of cork. These gauages are more trouble than than they are worth and should be hung on a nail in the shop or sent to China ASAP.!! Armand

Strange 460 gas problem????

jstpa

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Bob

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Allan in NE

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rustyfarmall

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jhilyer

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mkirsch

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Anonymous-0

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armand tatro

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