Thanks for reply..
its not cold enough to freeze its only 45 degrees outside. lift is well maintained as far as fluids go. oil,hydraulic,coolant,plugs are 4 months new distributor cap and rotor.. you are on the right track as i suspect somthing to do with the lpg flow...what i dont understand is why it starts easily and runs when warmed up and doesnt when cold..would fouled plugs cause this.. is there something in the fuel system that works better when the oil is warmed up and not so good when machine is cold???