crescent,
unless you leave your sled outside in EXTREME cold, keep 50/50 mix. The water does the cooling, the anti-freeze is just that, keeping for water from freezing. more anti-freeze actually lowers the water's ability to cool. there are two products out there that i know of, one is called "ice", that you add to the coolant that helps with cooling. I used it in my 4-wheeler b/c of mud clogged radiator which made a huge difference. I would not remove the t-stat. the engine will take much more time to warm up. unless the t-stat is bad, there could be an underlining issue. you can test the t-stat by boiling it with a thermometer and seeing that it opens half, and full, at the right temps. I dont know what the temp should be tho.
unless you leave your sled outside in EXTREME cold, keep 50/50 mix. The water does the cooling, the anti-freeze is just that, keeping for water from freezing. more anti-freeze actually lowers the water's ability to cool. there are two products out there that i know of, one is called "ice", that you add to the coolant that helps with cooling. I used it in my 4-wheeler b/c of mud clogged radiator which made a huge difference. I would not remove the t-stat. the engine will take much more time to warm up. unless the t-stat is bad, there could be an underlining issue. you can test the t-stat by boiling it with a thermometer and seeing that it opens half, and full, at the right temps. I dont know what the temp should be tho.