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I work at a Case-New Holland dealship and regularly use equiptment in cold weather. 1) Any type of coolant heater, any at all is better than ether or glow plugs. 2) Glow plugs are good on most down to about -10. It was -22 here last night ;) 3) Ether is good, in measured quantity. No more than 2 seconds of ether at a time, per start. In such small quantity it does it's job, and no more. You have to understand what ether, or starting fluid is for. It is used to raise the combustion chambers temperature to assist in the cold weather starting of ANY engine. Most notably diesels. A overdose for any engine of any size regarless of other add ons will result in engine damage. The larger the engine the more people tend to add in one shot as opposed to a injection system that delivers a small quantity over a period of time. With cans the majority of the vapors are drawn into the FIRST drawing cylinder. Thus the damage. A way to avoid this is to spray into the air stream wile cranking, so long as there is no one in the way of a run away machine. Or to spray a supplementary alternate into a air filter. I use brake cleaner (Isopropyl alcohol and Xyelene) to lightly dampen the inner air filter, then spray two or three shots (one second burst) onto the outer air filter. This prevents it from being drawn into the first cylinder. And allows seperate fuel to be used. I just had to start a skid steer that has glow plugs, with ether and brake cleaner. After people screwing around burning up the starter and glow plugs for hours.
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