Yeah really packed down trails here too, where can I locate the cooler? I will try that, thanks!My sleds been overheating in the same temps.
Trails here are really packed down and the snow is hard to get to stir up to the coolers....it's cold smoke! Riding harder and faster works to keep it cooler for my conditions but if stuck on the roads you're just gonna need to hit the shoulders/ditches/windrows.
One thing you can check is any obstructions of ice between the cooler and track.
Or, try some scratchers.