-----Original Message----- At least for Winter use, I would plumb a tube from the exhaust, maybe with a valve for shut off, or with an inexpensive thermac vacuum sensor that responds to temp, directly blowing on the carb to warm it, or duct the intake air that way full time, just like a car has for cold startup cold running. Even today alot of fuel injected cars have it. Gotta be a reason, and this seems like a good reason to me...
END................................................................. Great, let us know when you get it installed and how it works. Mark, you added carb heat, things got better? Carb ice is my vote. You said, "As I taxied out the temp was -1°C and the dewpoint was -2°C ". If you have temp and dewpoint within a 2 to 3 degree spread, carb ice is likely to occur. Even flying my KR with the Revflow carb, I avoided flying when this condition existed. I didn't have carb heat, just the alternate air source to the cowl but didn't want to chance it. I have flown my KR across country a few times in pretty cold weather without issue following this rule. (I sure miss that plane. I better hurry and get my KR-1 finished.) Fly safe Steve Glover Long-EZ N2121U Former KR-2 N902G) AJO, Ca <kr...@cox.net>