I refilled the propane tank after running dry, connected it and ran the forklift for about 30 minutes with no problems.
2 days later, I started it and now it won't idle at all.
I have to hold the accelerator down to get it to start and keep it running with the pedal. It's sort of like it was gas engine that was flooded. It also sounds like it may be missing on 1 cylinger or running lean or something.
There's 6000 hrs on the engine and it was running perfectly.
I also tried adjusting what looks like a mixture adjustment on the carb with no results.

Anyone have any ideas?

Sorry, meant to post this on Mechanical Troubleshooting Forum