Polaris 2008 Sportsman 500 H.O Logo

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steve borsheim Posted on Aug 26, 2016

2008 polaris 500ho shuts down when hot and after about 15 minutes will restart

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I have a 08 Sportsman 500HO which the motor starts cutting out between 3600-4600 RPM's

Hi Tom:
Sounds like a challenge.
I'd probably check the ignition system if I thought the fuel supply was working properly.
Replace spark plugs - test run
If there is a manual hi speed adjust screw on the carb, have you tried adjusting it at high RPM?
reply as a comment to this post and I'll try to help.
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2011 Polaris sportsman 500HO if towing in forward gear it locks up and won't let you go into reverse unless you shut the machine off and let it roll then it will unlock and switch gears wha

Sounds like a bad bearing or shaft in transmission.
Check the attached links,Manuals and guides, Good luck with your Bike
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

ATV TROUBLESHOOTING AND MAINTENANCE
ATV Service and Repair Manuals
Service Manuals for Download in PDF
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Shut machine off then go to restart and it wont fire

if thats all the info you have you need to take it to the dealer.
those have way to many possible problems.
1. bad spark plug seal, dirt fills up the entire spark plug hole especially sand.
2. they have fuel pump pressure issues due to poorly constructed fuel pressure regulators.
3. fuel pump itself
4. if intake or exhaust is modified it may overheat after it shuts off (engines get much hotter after they are shut down) will not start if too hot
5. one of the three ignition coil might be failing
6. CDI may have failed
7. Spark plug might be hot fowled.
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Atv Trouble Shooting

stator pickup or stator coil
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Help 07 polaris 500 sportsman 500ho cranks but will not start backfires only. changed gas cleaned carb cleaned fuelpump new filter 80 lbs compression new plug.points under thottle leaver has gap can not...

All most positive it is in your carb take the bowl off it as you take it off there is a small tube that hangs down that all most reaches the bottom of the bowl need to take a small wire and push through it it is blocked .symptoms backfiring no idle coughing and sputtering if it does start
Feb 05, 2018 • Polaris ATV
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