Polaris 550 Fan Problems. These issues are compounded in the 09 design by the lack of air flow into the fan shroud. Found the thermal cb up under the left front fender between the frame and fuel fill tube.
Checked the coolant temp sensor by unplugging it and it throws check engine light and temp icon. Find polaris 550 fan in snowmobiles | find snowmobiles for sale locally in alberta : These issues are compounded in the 09 design by the lack of air flow into the fan shroud.
Snowtech enthusiast tim roelfsema of falmouth, michigan tipped us off to a discovery he had made, and has implemented on a number of polaris 550 fans. Just lost the pto cylinder on my 09 550 iq. I took the front cover off and unplugged the fan and it works fine on a 12 volt battery.
2011 polaris ranger 400 ho engine swap from scrambler 500. Still no voltage going to the fan with. Try moving the clip up down on the needle to 4 or even 5 and see what kind of readings you are getting now.
Checked the coolant temp sensor by unplugging it and it throws check engine light and temp icon. That statement is contrary to my experience or the experience of several other friends and relatives who own or have owned polaris 550 fan motors. Symptoms are, intermediate stalling, no start, back firing and ruff idle.
These issues are compounded in the 09 design by the lack of air flow into the fan shroud. Both 550 engines, maybe 800 miles total between them (purchased in november). Polaris, arctic cat, kimpex, skidoo and more and spend more time exploring.
All polaris fan 550 engines include the following upgrades: Check for voltage at the fan (if you have power the fan is bad), if none is present then follow the wire until you find the stat that controls it and check for power there. Upgraded forged molly fix kit pistons.
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