Hello, new to the forum. I have an overheating issue that i dont think is "typical". Ive owned this scrabler 850 about 2 months, knew thew previous owner personally, never overheated. I rode for about 10 hours a couple weekends ago, came home from the ATV park, washed it, and took it for a ride the next day. about an hour into this ride is when it first overheated. let it cool, tried again, no go. noticed the fan seemed to stop blowing heat unless it was idling. called someone with a trailer. Since then i have replaced the thermostat, checked the water pump twice (no drips from weep hose either, and i made sure that was clear), checked all hoses, flushed the radiator, done a pressure test (passed polaris spec with 3x the duration they want) bled it after each reassembly (about 4 probably). rad is always full. pump seems to work (sucks down when i hit the gas) old thermostat tested ok and it has a new one anyhow. tried coolant temp sensor from another 850. another cap. fan runs and at about the right temp, but never cools back off only climbs. first time working on it at night last night, i noticed the header glowing very red, riding around the lawn in low at about 2000-2500 rpm for maybe 5 minutes, so im not thinking this is coolant related at all but i could be wrong still. 3 local dealers say i have done what they would do. hope someone on here has some insight, i didnt have good experience with my last polaris, and this one doesnt seem any different...