Jet Star 3 Super 206L-4 LPG Stalling Issues

I am new to all of this. I got my tractor from a near me with a half full tank. It ran great for about 4 hours then barely go it was empty. The gas companies here you say wet leg and they run. So I figured I could use a forklift tank it lets liquid out. So I turned off both valves on tractor tank. Connected my forklift tank on the left hand side where there is a block a cap on one side and the other side vapor line comes in. I crank it is strong runs great about 6 minutes then starts stumbling like it has no fuel barely goes. Turn off wait 30 minutes same thing strong for s bit then stumbles. Yes forklift tank in on hood and horizontal. Should I be hooking it up some place else to run off of this tank?

Should be a fuel filter in line somewhere which could be restricted. Also is there anti-freeze in cooling system, if not sufficient, regulator vaporizer could be icing up.

Don't mess with filter. If it ran fine before. I am not real familiar with forklift tanks, it does have to be horizontal like you say and does it have to be rotated in the right position to get liquid? What is your outside temperature? If it is 50-60 or below it is best to start on vapor or the vaporizer might freeze up like Istra says. There again can you rotate the tank to just get vapor? I have used LP tractors since 1957 and have about 15 of them. Never had to change a filter in any of them. If tractor tank runs empty and I have to move it I all ways use a 20# tank or 30 or 40 if I want liquid I turn the tank upside down. But you have to have a hose with adapters. On one end for the tank and the other end I use an adapter to fit the vapor return outlet. If you can position the fork lift tank so only vapor is released that would be simplest for you. This time of year if you are only doing light work vapor is all you need. Having said that, the small tank might not be vaporizing fast enough and starving the tractor. If you are going to work it then you should switch to liquid. I am sure I have confused you completely by now. So bottom line. There is two possibilities, If at present there is liquid coming out of the tank it could be freezing up till the engine gets warm. If there is vapor coming out it isn't getting enough fuel after it runs awhile because the tank is small. MMDEL

First off I want to thank you both for your help. It is like 58-68 here thats Florida for you. It's too late I removed the filter and it only had about a table spoon of powder debris in it. I put that back on and cranked it up it fired right off. Then I could not get the frost to stop where the bowl meets the base. I will go to Motion Industries and purchase some Orings this week. It does run good for a while gets warmed up then its like starving for fuel. I do not think it is freezing up. I do not that much if any about this but I see on the tractor there is the return vapor line could it be building up back pressure somehow I would think that would just go back in the tractor tank. I am not running it with the leak because it is bad. I will be on this project come Friday. If you have an idea I am all ears and will try it. Thank you again.

Did you change the valve on the fork truck tank? They will not feed enough fuel to the motor if it's working. You'll needto put a motor fuel valve on the tank for it to supply enough or it will starve

DeiselBear To answer your question no I did not. I found some motor fuel valves you talked about they deliver 1.7-2.2 gallons per minute. I could not find the rating on forklift valves. I figured a valve was a valve because the regulator is external to the tank. I want to thank you for your help. I will have to order one of those. I might should just order the valves that go on the tractor tank. I want to thank everyone for there help this forum people seem to help people out and that is great.

DeiselBear To answer your question no I did not. I found some motor fuel valves you talked about they deliver 1.7-2.2 gallons per minute. I could not find the rating on forklift valves. I figured a valve was a valve because the regulator is external to the tank. I want to thank you for your help. I will have to order one of those. I might should just order the valves that go on the tractor tank. I want to thank everyone for there help this forum people seem to help people out and that is great.