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03 400 sportsman. Loads up @ mid to full throttle. New fuel pump. No obvious wear or blockage in carb.Whats wrong?

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1997 425 magnum 4x2 new carb,coil,plug,wont rev past halve throttle then sputters no power


Fuel starvation (supply or wrong carb or tune) and/or insufficient or poor quality spark.

Make sure the air filter is clean and only test with it connected as it sometimes makes a lot of difference. It could be worth checking the exhaust for blockages.

Feb 25, 2017 | Polaris ATV

1 Answer

Sportsman 90 idles wont rev


Replace spark plug (gap correctly),Drain all fuel, replace fuel filter, replenish tank with fresh fuel, do a thorough readjustment of the carb settings (last resort - remove and rebuild carb)

Feb 17, 2015 | Polaris 2008 Sportsman 90

1 Answer

My 2014 Polaris Sportsman 850 XP started just fine in the cold this morning but when I went to start it again I turned the key and everything turns on but it doesn't start or fire it just cranks ove


check transmission shift levers.
polaris has over ride safety switches..
owners manual may help....
or fuel ice blockage at or near the tank pickup,or flow/noflow valve.
could be ice in float bowl of carb. (if not efi.)
...maybe use hair dryer to heat area near carb/efi unit.

Jan 18, 2015 | Polaris 2014 Sportsman XP 850 HO EPS...

1 Answer

Have a ploaris 400 2005 turns on runs great for bout 20 minutes then shuts down. wait bout 15 minutes will start and run again for a short time. What is the problem


most likely a fuel issue. has it been sitting up ? if so if its got a carb it prob gummed up, pour some seafoam into the gas tank with fresh gas and run it, try and keep it running with the throttle, it might clear some varnish out the carb if it not too bad, if tht dont work and it is a carb engine then the carb will have to be removed and cleaned. if it a FI engine then you got a bad full pump more than likely

Oct 01, 2014 | Polaris 2005 Sportsman 400

1 Answer

Engine missing in gear


Check your Air Filter, clean it out, check for obvious blockages. Change the filter if it looks well used (look for excessive dust or color change on the inner part of the filter) or obvious wear.
Check for other blockages around the air filter inlet.

Check the spark plug, just change it for a new one so that eliminates that possibly.

Check your fuel filter and replace if needed.
Check the fuel tank for corrosion or dirt in the fuel. Empty it out, Clean it and add new fuel, be sure you have the correct fuel.
Check your Air / Fuel mix adjustment screws on the carburetor.

Hope that helps a bit
Good Luck

Feb 09, 2014 | Honda 2006 TRX 250EX

1 Answer

Willn't stay running


check in ignition system.something heating up.

May 22, 2013 | Polaris 2004 Sportsman 500 H.O

1 Answer

At full throttle it starts to miss and lung back and forth


if its EFI its an injector, it not fuel injected, its a carb issue

Apr 01, 2013 | Polaris 2004 Sportsman 700 Twin

1 Answer

I have a polaris 400 sportsman atv. I haven't started it in 2 plus years, the battery is fully charged, it will not start. I put some gas in the tank.


you probably dont have a fuel pump issue, atv's after sitting have a problem of not starting due to carb gumming up. if its fuel injected, then i would say poss fuel pump but if not, the carb gummed is more than likey the issue.

Apr 01, 2013 | Polaris 2004 Sportsman 400

1 Answer

3130754 mikuni rebuild


did you check the float height?

May 01, 2017 | Polaris 2004 Sportsman 400

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