guys, I want to let you know that we have had an engine failure on an F7 now. It is pretty tore up on one side from driving it in from the village 30 miles or so at 30 below after the failure. It still ran one one side. Small amount of ice in the tank as well and one smart valve appears collapsed. nothing definitive yet-my gut is fuel issue-ie. real cold not so good fuel and perhaps smart valve issue. We have had good luck up until now and I wanted to be sure to mention this as well as all the good stuff. Will report more when we know more. The sled has 250 miles on it.
Steve
Steve