On your tough starting problem --
Put the glow on as normal to pre-heat and wait either til it goes out or until it is about to go out and start cranking the tractor. Once it starts to run (turns over), let the key come back just enough to stop cranking, but don't come back to the normal run position -- keep it half way between run and crank (there will be spring tension on the key). This will keep the yellow glow pre-heat light on and will be using battery power to keep the glow plugs glowing and the tractor will be running at the same time. I've found on extra cold days, this makes the tractor run smoother on the first super cold start of the day and it seems to help get the fuel burnt rather than blowing out unburnt fuel. You can control when you want the yellow glow light to go out in this situation -- just let go of the key and it goes right out.
I can't take credit for the above trick. I believe bearhawk was the original post I saw this on and tried it to see if it would cut down on smoke on the cold starts.
I've never had a hard time starting mine -- i.e. it always turns over, but the trick above seems to make less black smoke and yields less time of running rough on the cold starts.
On another note, I do use powerservice in my fuel for anti-gel and cetane boost. It claims to increase lubricity of the fuel and it may help too. I use about 3.2 ozs of power service per 5 gallons of fuel. That is the maximum recommended amount from the directions on the powerservice bottle. Walmart carries powerservice -- wife just bought me a gallon on her last visit.
It's pretty good when the wife gets tractor supplies to help fund my habits.[/QUOTE
I think that they may have changed that on the new ck20s, so that it will not do that. But I will defiantly try that once i get mine back. Man i miss that thing.