Four wheeler I have a 2008 polaris 800 sportsman, the problem is continuously overheats to where the engine problem starts flashing and glycol starts boiling out of reservoir...the fan i believe doesnt come on also for cooling.

bunch of different reasons from fuel delivery to cdi etc --------------https://www.manualslib.com/manual/848461/Polaris-2008-Sportsman-800efi.html

Check the battery terminals for connection. Check the fuse box to see if power is getting to the fuses. Check to see if the starter is getting power from the ignition switch. Make sure the shifter is in N. Move the shifter back and forth while having the key in the start position.

Hey Peter,
Sounds like the temperature sensor/fan control has gone bad...

Search Results Page 1 of 2 Clymer Manuals Polaris Sportsman 600 700 800...

Gary, Faulty fuel pump sending unit. Most of the forums I checked say this a big problem with Polaris, most say the pump and sending unit have to be bought as a assembly.
Check the attached links,instruction and guides, Good luck
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08 800 sportsman fuel gauge not reading correctly

Guide to Servicing the Fuel Pump Gauge Regulator 2006 Sportsman 700 EFI

Polaris Sportsman 700 fuel gauge fix

Inaccurate Fuel Gauge Fix Flashing Fuel Indicator

that sounds like your clock. engine codes don't go that high.and if it was your clock you must of lost 12 volt power at some point.

New 2012 850xp won't start - Polaris ATV Forum

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Jul 29, 2012 - With only 6 miles and 2 hrs on my new 850 the battery was dead. ...Location: Mc Minnville TN ... 2012 Sportsman XP 850 H.O. .... code 10.8 on a 2012polaris 850 four atv ... Copyright ©2000 - 2015, vBulletin Solutions, Inc. Broke my first axle
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Thread: Lo 10.8 code - Polaris Ranger Club

you might have a dirty carb.check the big jet in there as it might have a blockage.sounds like you have enough gas going through the small jet to start the quad and for slow speed but when you want to give it good power, it starts to bog down.do the carb thing first

try this first right beside the reverse button u will see 2 sets of wires clipped into the control be careful and pull these 2 apart u will see they will be all corroded up clean them up and dielectric them see if that works its a easy fix maybe

if that doesnt work try this...

I replaced the speed sensor, got my speedo operation back, no more intermittent 4x4 issues, and no more stalling in reverse! It's actually quite annoying how many things are tied into that one sensor. Makes for a frustrating trip out of the bush if it starts acting up on the trail (like mine did). Good luck with your repairs!

1. eHow
2. Car Repair & Maintenance
3. Car Oil Maintenance
4. Drain Car Oil
5. How to Repair a Polaris Four Wheeler

How to Repair a Polaris Four Wheeler By Brianna Byrne, eHow Contributor Spark plug inspection and adjustment can be one way to repair a Polaris ATV.

Almost every vehicle needs regular servicing and repairs in order to continually perform at its best, and Polaris' lineup of four wheelers is no exception. The company has released dozens of ATV makes and models throughout the years, ranging from sporty racing quads to youth models to heavy-duty utility ATVs. Despite the differences between the company's many makes and models, general repair tips and troubleshooting instructions remain consistent for all Polaris four-wheelers. The electrical, ignition and fuel systems are some of the most common sources of Polaris ATV problems.

Read more: How to Repair a Polaris Four Wheeler ' eHow.com http://www.ehow.com/how_8074861_repair-polaris-four-wheeler.html#ixzz26pmQIzeh