Question about Polaris 2008 Sportsman 500 H.O

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Why will engine start and idle fine but off idle just wont rev up

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Check your fuel system components and make sure theres no dirt in there anywhere

Posted on Oct 20, 2016

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Posted on Jan 02, 2017

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My 550 arctic cat '2010' hard to start,turns over strong will eventually start idles fine but when throttle is applied it revs up briefly then gags to the point of stall. no codes up


Sounds like a fuel blockage or your fuel pump is worn to the point that it can no longer provide the correct pressure.

May 07, 2017 | ATVs

1 Answer

Idles fine,,push pedal and it dies


Idles FINE but stalls when pedal is pressed - Yamaha Rhino Forum ...

www.rhinoforums.net > ... > Technical > Engine
Feb 6, 2012 - 9 posts - ‎5 authors it starts fine but stalls when I press the gas pedal. what do I need to check now. Sponsored Links. RhinoForums.net is the premier Yamaha Rhino UTV/ATV Forum on the internet. Registered ... Does it seem to Idle smoothly and does it start right back up after it dies? Does it .... astro push accelerator and dies.

Oct 07, 2015 | ATVs

1 Answer

STARTS UP IDLES BUT WONT REV UP ALREADY CLEANED CARB ANY OTHER SUG?


Just a couple of ideas:
- Make sure the air filter is clean.
- Check the mixture. If it's too rich it won't rev like it should
- Check the timing. If it's retarded it won't rev like it should.

Mar 05, 2015 | ATVs

1 Answer

I have a 1990 klf300b3 atv starte fine idles fine some time revs an runs fine outher times misfires when trying to rev have changed plug had carb an tank cleaned when misfiring can let idle or turn of


Replace the line from tank to carb.

Next time you run it, take the gas cap off when it starts to misfire. If it runs OK with the cap loose, your cap vent isn't working.

Oct 26, 2014 | ATVs

1 Answer

Wont idle without choke being used


Main jet dirty. Likely Ethanol fuel fouling. Remove and clean jet. Check all rubber tubing to/from carb for cracks/deterioration and replace.

Nov 24, 2013 | Yamaha 2004 Bruin 350 Auto 4x4

1 Answer

2001 yamaha 350 warrior that will start and idle but when you give it the gas it stalls.i've taken the carb off and cleaned it changed the plug. removed the wire from the emergency break lever. and it...


If you have good spark then it's most likely a fuel issue, anything off of idle is dealing with the main jet and metering needle, clean jet and check needle for excessive wear.

Oct 20, 2013 | Yamaha ATVs

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