take the gas pipe off the mixer and suck on it, if you cannot suck gas out of the vaporiser there is a problem with it. Does it have the VFF30 lock off or is it an electric solenoid? If its the vff30 when you suck down the vacuum pipe does it hold vacuum or can you constantly keep sucking? If you can constantly keep sucking the VFF30 is bad

OK guys,
Replaced the Mixer and put it back together. I tried starting it, and it ran for a brief second and quit. Now are can't get anything out of it. IDEAS?

Hi John,

Thank you for your reply.

I put a new coupler on the line. I think the one on it was the original. I thought, well, maybe the little nub on the end may be worn or the tension on the spring was not strong enough to open the valve all the way. Changing it did not do any good.

I just got a new LP Tank today. Filled it, tried it.. SAME THING!

So, I just got off the phone from ordering a new Mixer /Carb. There isn't anything else to replace.

Keep your fingers crossed!

Or send money LOL.. kidding. I hope this works.

Thank you to everyone who has provided information and help! I'll let you know if the Mixer is/was the cause.

Should I just replace it too with a NEW Carb / Mixer?

Does anyone have a part number for the C500YS60 Carb/Mixer?

Is there a big difference between the "Y" and the "YS"?
Thanks for the help!!!!!!

David

I replaced the coupler with a brand-new coupler. I currently have a NEW LP tank on the way. I truly am running out of components to replace. Prior to replacing the converter and the coupler, there was no smell of gas. Now there is a faint smell of propane. I can't figure out where I am smelling from. The last thing I have to replace is the carburetor.

David,

Yes, the carb is referred to as the mixer. Though on this lift as old as it is you probably have an actual carb. They throttle shaft will wear over time allowing a vacuum leak causing a lean condition.

I replaced the LP converter with a NEW one. When you say the "Mixer" are you referring to the carburetor?

Andrew, I just sent you a pic of the convertor.

David,

I would suspect the diaphram in the mixer has failed. They will get small cracks in them that will not let the engine run at full throttle. You should be able to take of the top to inspect. Need to be very careful as you can cause additional damage and replacement is the only course. If you find a small rip or tear in the rubber, I have used RTV to seal. Must let it sit for a day to dry. Wil hold up for a short time, still needs replacing.

Look inside of the l p coupler to tank
should not be a
Seal I've gone on service calls with same
Problem and found when they changed tanks the seal from old tank stayed in coupler
Sounds crazy but with that seal in there it won't open valve enough for fuel

if gas is freezing you need to do radiator pressure test i suspect you have a leak in the system which airlocks the water circulation through the convertor hence the freezing if no leak you have a bad convertor

Hi, I have the same forklift and what WAS on it was an IMPCO Model K. Why, I am not sure, but this model is VERY hard to find. I replaced it with a Unisourse TSA/800115159. I purchased mine from ALTA Material Handling. 630-966-0450. $126.19

Ok, for my issue. The forklift was running fine until it ran out of fuel. Using the SAME TANK I had the tank refilled and put it back on the forklift. Opened the value and it started right up. Went to give it gas and as soon as you passed ideal, it started coughing - like it's not getting enough fuel. Turned off the tank valve and ran the forklift out of fuel again and disconnected the tank. Then reconnected the tank and just "cracked" the fuel open a little. I was thinking, well maybe the safety value engaged. It started right up, running smoothly, pushed on the gas pedal, and the same thing happened.
I nursed it out of the middle of the driveway trying to figure out what was wrong. Checked the "O-RING in the fuel tank to make sure it was still there. I spent the rest of the day on YouTube and the Internet trying to figure out the problem. I found one video that said, "PUSH THE LITTLE BUTTON ON THE SIDE OF THE VAPORIZER." That the button acted kind of like a choke. So, I did. Will shoot, I had FULL PEDAL AND IT WAS RUNNING GREAT! I released the button, and it went back to the same problem. More reach and I was convinced that somehow the vaporizer had gone bad. So, I replaced it with the one I mentioned above.
Surely, this would fix the problem - RIGHT? Nope, Started the forklift and I have the same problem. Ok, it's an old forklift so I thought, MAYBE the connector to the tank has worn out enough that it is not making good enough contact with the fuel tank to release enough gas when there is a demand. I ordered a new Connector, and O-Rings for the fuel tank. Put them on today, and the problem still exists.
THERE JUST ISN'T THAT MUCH TO A LP SYSTEM TO GO WRONG!
Last summer I put all new points, condenser, cap, rotor, plugs, and wires. Basic tune-up stuff. I checked the cap and rotor to see if they were still in good condition and they are. Again, all this started AFTER I RAN OUT OF FUEL AND PUT A REFILED TANK BACK ONTO IT!
The last thing in the line of possible components is the carburetor. So I am looking for a rebuild kit for that now.

Can anyone tell me what is going on?
I do have a video of the forklift running at idle and when I am trying to give it gas.

Thank you.

P.S Andrew, if I can figure out how to post a pic of the model K and the one I put on I will.

Email the pic