Posted by Billy NY on November 30, 2012 at 09:00:02 from (24.29.79.122):
I would have to imagine someone here is familar with the Model J Impco vaporizer. What I am wondering is what would cause it to frost up, even in moderate and or warmer temperatures, right now being colder, its freezing up and shorting the carb from fuel or so it seems, look under there and its frosted up but good, so is the fitting on the carb inlet, this is a 172 Cu In. in a Ford 850.
Starts up and runs fine for a little while them sputters out, seems if I put a furniture blanket over it, the engine heat eventually makes it right, same thing has to be done even if I take it out from the heated garage.
In '04 I rebuilt it with a kit, replaced that safety shut, external cylindrical thing with a positive wire to it. Do these need periodic service, sludge up from LP, was no big deal, to rebuild, seems it was pretty decent in colder temps for awhile, but I think the past few seasons its done this, the model J on it does look old, the button on top is pitted from rust, is there a modern equivalent or are they available ? Also seems the tractor runs real cool, I replaced the thermostat a few years back, coolant level is up also, so I believe its circulating through the vaporizer. Had gone out with it last night to retrieve a deer that I got shortly before, annoying as heck, finally cleared out, but was just wondering what anyone with LP power/conversions thought, seems simple enough to correct, but was wondering what may be the actual trouble, LP must be staying as a liquid, and we know how that works in the cold LOL !!!
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