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Subject: Fuel shut off valve.

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Bryan Waterworth    Posted 06-26-2018 at 10:26:57 [URL] [DELETE]        [Reply] [Email]  
  • Fuel shut off valve.
  • I just put a new fuel shut off valve and sediment bowl on my 2N. I have to turn the shutoff valve all the way out to get a steady drip into the bowl. Is that the way it should be? Also, I cannot get the bowl to stop leaking. Any ideas? Did I just get a bad valve?

    Tim Daley(MI)    Posted 06-27-2018 at 04:49:13 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Fuel shut off valve.
  • Okay I have to ask because sometimes it is the plain obvious things that are overlooked. How much gas is in the tank? To install a sediment bulb the tank has to be empty first so did you fill it up or only put in a gallon or so? The Sediment Bulb is designed so 2 Turns Open accesses the Main Fuel flow port. When valve is fully open, it allows the 1 gallon reserve port to let fuel to flow. A low tank would one reason why you don't get any flow unless all the way open. Next, Don't assume a new part, especially today, out of the box is all set and ready to go. Check it out before installation. It is possible your A) new unit is plugged, or B) your fuel tank has a lot of rust, dirt, flakes, that have worked into the main inlet port and plugged it up. Where does the leak come from? Often it is the valve stem due to a worn seal. Is this what you mean by 'old seal'? If you mean the horizontal gasket between the glass bowl and the unit, is the new one rubber or cork? Use cork and soak it first in fresh gas. Be sure the fuel line is the correct size with correct fittings. Brake and fuel lines use as special thread size -7/16-24 UNS and often get boogered up installing due to cross threading. Always start a fastener by hand to get the 'feel' that its correctly started. The sediment bulb is a soft metal -pewter or zinc in the old days, aluminum today so it doesn't take but one bad attempt to muck up the threads. Poor fuel flow on a new bowl is often caused by a vacuum too. Upon assembly, open valve slightly and loosen the bowl clamp slightly to release any vacuum lock. These are the major things to check for a leaking/non/functioning fuel bulb.


    Tim Daley(MI)

    Steve Dabrowski    Posted 06-26-2018 at 17:40:40 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Fuel shut off valve.
  • I had a similar problem with a new fuel valve until I realized the carb float valve was shut with fuel in the bowl and created an air lock that seemed to prevent fuel from descending into the sediment bowl. Drained the fuel some from the carb and that immediately allowed fuel to flow from the tank.

    Also with a new fuel valve I found a factory plug on one port for the fuel line was only hand tight and that was leaking. Tightened and fixed (new valves have two possible ports for different tractor applications).

    Bryan Waterworth    Posted 06-26-2018 at 18:41:30 [URL] [DELETE]        [Reply] [Email]  
  • Re: Fuel shut off valve.
  • I used the old seal. It was thicker than the new one that fixed the leak. There may have been a problem with the float. It started working after I changed the seal out.

    AL CT    Posted 06-26-2018 at 11:29:46 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Fuel shut off valve.
  • Depending on the country of origin for your sediment bowl, you may never see it operate properly. Off shore product is total crap. Try Just8N listed in the links bar at top of home page. So far, their items are worth the effort to add to your tractor.

    Frank (WNY)    Posted 06-26-2018 at 11:57:02 [URL] [DELETE]        [Reply] [Email]  
  • Re: Fuel shut off valve.
  • I just installed a new one from Just8N's a few weeks ago. The nut at the bottom of the bail took a lot of tightening to get it to seal. I used the neoprene one that came with it. I had a new cork one, but if I have a reason to take the bowl off again I will probably replace it with that one. Check around the nut on gas line going to the carb. if that weeps it makes the bowl look like it is leaking.

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