OK, here is my problem. My Clark will not start. It was running fine, but after sitting outside exposed to last winter, it has not started since.

The information I have gathered is the following:
Clark C300-40
Propane Fuel
4 Cyl Engine
I believe the serial # is one of these?
356 1 5146
2372878
3275 24 188 24

Once I started diagnosing it, I quickly found coolant pouring out of the carb! Since then, I have replaced the following:

New Impco Model J Regulator
New Spark Plugs
New Plug Wires
New Cap & Rotor
New Battery
New Starter

I also took the carb off and cleaned it out, as it was caked full of "Gunk"

I have great spark, but it seems that the propane is not getting into the engine. Engine cranks fine, but it won't even sputter.
I know nothing about forklifts, just going by what I see. I desperately need help, and I found this great website with the hopes that someone can help me.

I appreciate any insight that anyone can give me because I am lost! If you need any additional information,. I will do my best to provide that.