Anytime I see a bunch of 'honey' in the regulator, I also would want to check to see if the unit had an LPG coolant thermostat, and if it worked correctly and if not, I would want to try and sell the customer on buying one. I would also be checking to see what temp the engine was running at. you get a lot more honey from a machine that when running stays at a 180F. reading at the regulator, than on a machine where the regulator stays about 150F. and if the radiator cooling tubes are clogged and the engine runs at 210F. you will get even more.