ok guys, I took the cover off and there is no F at the end of the serial number so am guessing its not the F but the P version ( although there is no P at the end either. It is hand engraved also ). I received the manuals for the F version and it appears to all look the same as the Fuel and what i gather was the oil line are T'd together as it says to do in the F instructions. So what will be the difference if i hook up the propane fuel and air as it states in the F model instructions??

cheers for all yor help so far.