Re: Propane fuel

Posted by Roger on January 29, 2004 at 07:03:00 from (65.133.129.182):

In Reply to: Propane fuel posted by Tom in Texas on January 29, 2004 at 06:15:14:

The motor will use the same amount of fuel on Vapor or Liquid. The Vaporizer turns the liquid into vapor, so you are really burning vapor all the time. When it gets 30 or 40 dergres and you are pulling the tractor the LP Gas may not vaporize fast enough to keep up with demand. Run on liquid. However, you are in a warmer climate and should not have this problem. The excess flow valve is probably closing and keeping the tractor from running. Start the tractor, run it on vapor. Watch the LP tank. If it "frosts up" on the bottom part of the tank, the fuel is not vaporizing fast enough. If the fuel line from the valve to the vaporizer "frosts up" the excess flow valve is shutting off. Depending on the humidity (high) you will see a lot of frost, if the humidity is low it will be more difficult to see. If the excess flow valve is bad you will need to run the tractor completly out of fuel to change the valve. After you have run it out of fuel, make sure to open a valve (after the engine has cooled) as even a small amount of LP will create pressure. If the valve looks shiny and new it may have been replaced in the last couple of years. Someone may have used a "bottle" valve. In this case the excess flow may be to long. When the valve is installed in the tank, the excess flow will bottom out and close. The original valve will be a Rego with a "Large nut" to hold the valve seat. This valve is larger and bulky compared to the new smaller valves used today. Unfortunatly we don't have any LP Men around anymore. With so many laws and different applications it is easy to get the wrong parts or advice.

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