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Cold weather, only problem is when the fuel does not vaporize, and I'll asssume that some variables come into play here, blend of fuel and how your fuel system is operating. Below 20 deg F or so, I had some issues with this, put a re-build kit into my Impco vaporizor, did not get a chance to try a cold start, tractor has been in a heated shop, on a jobsite. Vaporizor has coolant from the radiator passing through it, connected with hoses, so once it warms up not an issue, others may have some better info on this. This on uses 30 lb forklift size tanks, so they can be left inside when it's cold out, helps when starting. When the fuel gets cold enough, can be hard to get it to vaporize, how people deal with this will vary, keep in a heated shop, block heater or some other means. Can't say whether you get better fuel efficiency with LPG, 30lb tank seems to go for 5 hours on this old ford 850, which may be different then the JD 620 LPG set up. They run cleaner, the oil stays clean and I'd imagine a properly maintained engine will last a lot longer then one that runs on conventional fuel. If you have to run inside a building, lot cleaner to run. I'd imagine having your own tank on site to re-fill, would be nice for re-fills. Fuel system on this one was simple, vaporizor, hoses, some electrical connections, LPG carb, not sure what yours has, seem simple enough. Probably not as many factory LPG models, have seen many for sale reasonable, some people shy away from them. Safety, best to keep everything in maintained and in good order, common sense would tell me to be attentive and immediately repair any leaks, and use care if when re-filling. Common sense ? I like my ford with the LPG set up, and it came in handy while using it inside a building recently, runs clean, oils stays very clean, and with the hours I put on this one, Sept '04 was the last time it was changed and it's still clear.
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