I've considered the mod, but don't like the idea of creating more noise inside the cab. Seen some reports that post-mod, cab noise at full throttle increases significantly.The Ranger 900 has the same problem. Some guys are removing the pipe that connects the side vent and installing a Ranger 800 intake baffle behind the seat. This puts the intake inside the cab and will create more noise inside, but it won't clog with snow. Part #5437950, under $20.
Update: Had to replace the block heater.Better yet, get a block heater or inline coolant heater. I have the dealer-installed block heater, and it helps immensely with cold weather starting, even just 1 hour of heating and my Bobcat 3650 starts on the first try, the little "heating" icon never even comes on when I turn the key. Block or coolant line heater, either one requires draining the antifreeze. If you want a quick fix, try a Kat's magnetic heater.
Where is the air bleed screw for a 2013 Polaris Brutus with Yanmar engine?Success! Yesterday I replaced the failed block heater with a new one - Zerostart 310-0003 was the match for the '13 Brutus/Yanmar. Very easy, now works perfect. I didn't have to drain the antifreeze ahead of time - to your point, working quickly and the fact that it was near the top of the block helped limit coolant loss. Bled the air, added as needed at the reservoir, and all works great. Thanks again!