have an old hyster 50 has about 10700 hrs on it. Every once and a while it doesn't want to start. It turns over, but doesn't want to fire up. If left alone for while and then come back it sometimes starts, sometimes it takes a couple of days. Then it's good for while anywhere from hours to days. Have changed the mixer, and done a tune up (spark plugs, wires, rotor, and cap). did an oil change and checked the filter. Went through wire harness and checked for any breaks cuts or burns. I don't have any books or schematics so im going into this blind. Any thoughts or ideas would be help greatly. Thanks.
Does it have points or a breakerless ignition?
Did you try to press in the center of the LP fitting and blow the fuel out of the line? Our old Clark will sometimes vapor lock and do the same thing.