If-when the engine is cold-the engine will idle fairly good, but starts to sputter when the gas pedal is depressed & the symptoms go away once the engine warms up, it's a symptom of a tarred up regulator. My advice would be to replace the regulator & shut off valve, clean the mixer & replace the mixer diaphragm.
On a side note- you will experience a decrease in performance from a LP fired engine when the ambient temps are extremely low. The only fuel pressure the fuel system gets is from the pressure in the propane tank, which drops dramatically once the temp drops.
would love to say the cold weather could be a cause.... but it does it in all seasons. the serial is "D004V04780M. Therm is good... could it be the LPG filter or converter? maybe the converter isnt working properly until the coolant heats up.?.?.?
An older 80s anything running on propane is likely to run poorly at temperatures close to 0 F degrees. In fact, a lot of newer propane fueled stuff does not always enjoy good operation at those temps until the engine is warmed up well.
And on that note, it would be a good idea to know that the engine thermostat was functioning properly.
Just last week one of our older Komatsu Dash 12s (Impco J reg and VFF30 lockoff) would not run satisfactorily.
Noticed the temp gauge showed cold.
Checked gauge and it was working. Found thermostat was staying open about 1/16" and that was enough to keep the coolant chilled in the 10 F degree weather we had then.
will post the serial monday morning when im at work. no light on. its an older hyster.... 80's.....
yes... serial?
also... MIL light on? any codes displaying on dash?