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Good advice, they definitely run cleaner, can be a little problematic starting in cold weather, mine does not like to start belwo 10 deg F. The vaporizer uses coolant for heat and as long I can get it to temperature it will vaporize and run, other wise it liquifies and as hard to start when it gets down to 10 deg F. With the warmer temperatures this year I have not kept it inside the heated garage, that makes it an easy start, the bitter cold seems to make the propane stay in liquid form. The funny thing is, that I recall all of the propane forklifts in the lumber yard not having too much trouble with cold starts, so this Impco vaporizer/regulator may have some issues, I hear some hissing, something leaks on it, never have been able to positively conclude what the deal is with cold starts, I've been avoiding it by using the heated garage if snow or artic temperatures are on the way. One advantage I have is that it uses the 30 lb removable forklift size tanks, I can keep it inside in the heat, take an extra to the field, have to get them refilled down the road, they seem to last at least 5 hours under a moderate workload. I assume with a fixed tank you need a nurse tank to refill and need to be careful about running out if you cannot fill it in the field, hopefully someone else can shed some light on the options here. I like how my ford 850 LPG runs, I get pure propane from the supplier here, the oil stays clean for a year, properly tuned it does not lack in the power dept. as I can recall the performance of the same engine powered by gasoline, LPG may provide a bit more HP,not sure if that is true though. It sure runs crisp, and even with a 6 foot brushog in high grass going up hill in 1st or 2nd gear it will hold it's own, but gets hot quickly, so I do not push it, I've got some strange external coolant leak and steam that becomes noticeable when putting a heavy load on it like this, have to figure that one out. I know better than to run this one until the exhaust manifold is a dull red, but although it's a little ugly with the tank, I like it as a workhorse so far.
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