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Farmall & IHC Tractors Discussion Forum
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450 gas starved

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red barn hay

05-14-2006 05:41:27




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My brother just bought a 450 that starts and runs fine for a little while then acts like its not getting gas. The gas shutoff is open. Any ideas why?




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RustyFarmall

05-14-2006 06:13:13




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 Re: 450 gas starved in reply to red barn hay, 05-14-2006 05:41:27  
Try it with the gas cap removed first, if that works, you need a new cap. The next thing would be to shut off the fuel under the tank and then remove and clean the glass sediment bowl, there is also a fine mesh nylon screen that sits on top of the glass bowl, make sure it is clean also. You could also have a bunch of crud and rust in the fuel tank, which is restricting the flow, and the fuel inlet fitting on the carburetor also has a fine mesh brass screen attached to it. This screen may also be plugged. The last thing to check would be the needle valve and seat inside of the carburetor, the carburetor will need to be removed and disassembled to do this. If you trouble shoot in the order I have suggested, you will avoid any unnecessary work or expense. Here's a hint, the sediment bowl may not want to come apart, and it may leak when you put it back together. A brand new sediment bowl assembly is available for about $20 to $25, not much point in trying to repair the old one.

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Janicholson

05-14-2006 06:02:19




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 Re: 450 gas starved in reply to red barn hay, 05-14-2006 05:41:27  
Starting at the Gas cap:
Make sure it is vented and the vent is open.
Look in the tank, if ugly and rusty it must be removed and cleaned. (vheck the archives here for many ideas on how)
clean the sediment bowl under the tank, (and the screen above that in the opening) Free flowing fuel into a container at soda straw sized flow rate.
Remove fuel line at carb and clean screen located there. Blow through line with air pressure.
Pull the bottom off of the carb and be sure the needle and seat are not plugged up with flakes of rust or junk.
These are the foundations of the cause. A bad coil can make the sympton if it is getting too hot to touch. Good luck, as the gas cap says "buy clean fuel keep it clean".
Let us know what happens it helps all to know the results.
JimN

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