I have what I THINK is a 92 Yale Lift.
Model # GLC060LCNSBE077BCS Serial Number: N513615
This old thing has been put through it but its still chuggin along.......kinda. After sitting most of the winter, I went to start it and the propane tank was empty. I refilled the tank and then it fired right up (as always). I ran it for about 5 minutes then it started choking itself out. It would idle fine and misfire, hard. It would do that for about 30 seconds then it would smooth out. However, when I went to accelerate it would absolutely fall on its face. It would spudder out and eventually die. I could get to crank back up but it would do the exact same thing. However, if I let it sit for about an hour, the cycle would start all over again. Fires right up, runs great for a few minutes then misfire, then no acceleration and dies out. I checked the plugs, they were fine. Thats about the extent of my knowledge on this machine. If it were a gasoline engine, I would be fine with diag but the propane is throwing off my diagnostic abilities. Any help?
Second question.......the transmission fluid on this machine, I cannot seem to find a solid answer on what it is. Some suggest Mercon while others suggest regular engine oil while some suggest hydraulic fluid. I would give anything to have the actual service manual but Yale no longer provides ANY support and every avenue I have searched has led me straight to a brick wall.