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2005 Polaris 700 sportsman 4x4 gets warm, looses power?

Can anyone help me, I have a 2005 Polaris 700 sportsman 4x4 that once it warms up, looses power? It starts right up cold, no problem with more power than needed really... BUT once it warms up, it drastically looses power??

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  • Ronny Henry Mar 07, 2009

    I forgot to mention it is a 700EFI.

  • Anonymous Apr 16, 2009

    I have a similar problem. When my 2006 sportsman 800EFI gets warm (1 or 2 hrs of riding) it shuts down. It acts like it is running out of gas. Let it cool down for 30 mins + and it runs like a champ.

    Any ideas?

  • Anonymous Apr 23, 2009

    i have a similar problem that started today with my 04 sportsman 700 efi. it was running great then all of a sudden it lost power and started ticking, i think either the gas tank or the efi maybe dirty.

  • seth guthrie Nov 03, 2013

    had that issue happen also had to replace waterpump and thermostate and it fixed it. the exhaust got so hot it melted the plastic on the right side just below the seat, even wrapped exhaust with the temp clothe

  • skip james
    skip james Nov 16, 2013

    as a auto mech. it sounds like your engine is to rice which puts to much unburnt fuel in the exhaust and makes it glow . if you have a carb rebuild it and if injected check temp sensor for correct reading and o2 sensor

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My 2005 700 efi is doing the same thing. So far I have found that the engine and exhaust get so hot that the fuel starts to boil and causes the fuel pump to vapor lock. I taped up the tank with some reflective tape/insulator stuff and now I'm trying to figure out why its running so hot.(The exhaust manifold glows red hot) I've cleaned the radiator and flushed the system. I just need to check the water pump and thermostat. Any other suggestions?

Posted on Sep 02, 2009

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My Sportsman runs bad when heated up, but if you add fuel it runs fine again. I had a pick up that had an internal fuel pump like our Sportsman's and it did the exact same thing. It turned out being the fuel pump was worn out due to a plugged fuel filter. Forcing the pump to fail prematurely. I found I had bad fuel in my Sportsman and am going to replace the filter and the fuel pump. I also checked my plugs, MAF sensor, and Air filter, they were fine.

Posted on Sep 16, 2009

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Sounds like your EFI system is running too lean. Check your spark plugs for any signs of running too hot. Check you injectors. Download any Polaris manuals for your ATV and look up EFI system dianostics and trouble codes conversions.

Posted on Sep 11, 2009

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I HAD THE SAME PROBLEM PRETTY WELL ITS PROBABLY THE STATOR BRUSHES NEED TO BE CLEANED OR THE NEXT TIME IT HAPPENS CARRY AN EXTRA PLUG AND CHECK THE SPARK

Posted on Jun 25, 2009

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