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Polaris 300 carb floods new needle and seat and floats works on bench but not on engine

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 4 Answers

SOURCE: sum idiot put diesel in the petrol tank. have

remove the carborator and clean it replace the plugs hope for the best

Posted on May 15, 2009

  • 1 Answer

SOURCE: 1999 polaris magnum fuel comming out carb

i have no spark

Posted on Oct 26, 2009

  • 9 Answers

SOURCE: polaris will not run

Seriously, guydaigle? The 300 Xpress is a two stroke. The problem is too much fuel. Start by checking and adjusting the carb. Look at the needle & seat, then the float level.

Posted on Nov 09, 2009

  • 1 Answer

SOURCE: Working on a 1999 Polaris Explorer 300, does it

on a polaris 4x4 hawkeye where is the fuse box

Posted on Sep 12, 2010

  • 123 Answers

SOURCE: 97 polaris 500 sportsman 4x4 atv carburetor

If you have gone through the carburetor and your atv still won't rev it sounds like the exhaust lobe on the camshaft is going flat. They have an overhead camshaft in the 500 motor and the exhaust lobes seem to wear down if the oil is broken down (gas in oil) or if the wrong oil is used. Easy way to tell is to remove the 8 screws on valve cover and the spark plug. Then remove the 4 screws holding down the rocker arms. Once the rocker arms are removed you can see the camshaft, pull on the recoil rope to rotate engine until the lobes are facing upward. The two outer lobes are the intake lobes, and the center is the exhaust lobe. If the exhaust is worn, you will definitely be able to tell because it should be about the same height as the intake. Or if you don't feel comfortable doing that I would recommend a reputable repair shop. Hope this helps, and if you need more help let me know, Daniel.

Posted on Sep 30, 2011

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1 Answer

08 outlaw 90 no start clean carb run great 2 weeks cuts off few times start back then no start air cleaner bad clean crab no start plug drippin wet run 4 few gas hafe off


if the plug/s are wet , that is flooding and that is excessive fuel or float level , probably from a problem in the needle and seat area where the fuel supply is not being controlled
remove the needle and seat and clean all dirt and rubbish from the needle ans seat area
could come from rust and dirt in the tank so consider an inline fuel filter before the carby/s

Mar 05, 2016 | Polaris ATV

1 Answer

99 Polaris 500 xc sp flooding, cleaned carbs and checked floats and main jets. reinstall carbs and run. next day fill gas tank approx. 12 gallons. next morning motor completely flooding gas tank lost


it sounds like it is still you needle and seats are worn or your float has a hole in it just check the float and see if it has fuel inside it ,but i say a new set of needle and seats and bowl gaskets cheers

Jan 27, 2015 | Winter Sports

1 Answer

Carburetor is leaking fuel floats needle valve and seat all working perfect


On some of the Polaris carbs they had a screw in seat with an o-ring/screen that would give some problems. Not sure on your model but I would double check is you have the o-ring.

Jan 30, 2012 | Polaris ATV

1 Answer

Gas continues to run from my 1987 Yamaha XLV snowmobile after the engine is shut down


The needle and seat in the carburator need to be replaced . Gas continously flowing is a stuck float which operates the needle valve in the carb.

Sep 30, 2011 | Polaris New Genuine Polaris Snowmobile...

1 Answer

I have a Sears Eager 1 self propelled mower.. the Carb float was not shutting off the fuel gas was running into the engine and out the carb. I took the Carb apart. the needle and seat looked fine so I...


If there is freedom of movement for the needle, then look towards the float. Does the float have any fuel in it? If so, it will not rise properly to move the needle to shut off flow to the carb which will cause the flooding you are observing. If no fluid in float, you mentioned that you raised the float a little, should have gone the other way. By lowering the float it will seat the needle at a lower level in the bowl. Ensure that the needle seat is properly installed. If this does not solve the problem, purchase a new float.

Note: The model number of the mower is not helpful here. What is required is a model number and brand for the motor.

Jul 08, 2011 | Craftsman Garden

1 Answer

Virago 250 ran good until last parking. then, about two weeks later, what looked like a gas/oil blend began pouring out of the breather when cranking. engine would not start. removed carb and replaced...


Check you oil level first and foremost, sounds like your bike IS flooding. When you replaced your float needles did you inspect the seats they sit in?? if they have a nick in them they wont seal and flood. remove the carbs and bench test them. you may need to lap the seats if they are nicked if you need to please contact me and i will give you step by step on that part.
Good luck
M.Woodring

Apr 19, 2011 | Yamaha YZ 250 Motorcycles

1 Answer

This is for an 1979 Honda CBX. I installed new float needles and seats. Also, I adjusted float levels to factory specs. All carbs are still flooding.


I PRESUME YOU THOROUGLY CLEANED THE FLOAT NEEDLE SEAT?AND INSPECTED THE NEEDLES FOR LIKENESS COMPARED TO THE OLD ONES, SOMETIMES YOU HAVE TO IGNORE THE FACTORY SETTINGS PLACE THE CARBS ON THE BENCH WITH A FUEL SUPPLY CONNECTED AND ADDJUST EACH FLOAT UNTILL THE LEVEL OF FUEL IS BELOW THE OVERFLOW TUBE ALLOWING ENOUGH ROOM FOR THE FLOATS SO THAT THE LEVEL STILL LYES BELOW THE TUBE WHEN FULLY ASSEMBLED, COMPLETE THIS TEST BEFORE FIXING THEM TO THE BIKE, WHEN YOU ARE HAPPY REPLACE THEM BACK ON THE BIKE,

PS IS THE NEEDLE SEAT AVAILIBLE SEPERATLY MAYBE WORTH INVESTING INSOME NEW 1S IF THEY DO

YOU COULD HAVE THE CARBS ULTRASONICALY CLEANED

Feb 27, 2011 | 1979 Honda CBX

1 Answer

Fuel leak on Polaris 325 trail boss it is leaking out of the bottom of the carburetor.


if it is leaking from one of the drain tubes coming from the carb it could very will be the float is stuck or the needle on your float is not seating correctly and is causing it to flood the carb and leak out the overflow tube(s)

May 09, 2010 | Polaris ATV

2 Answers

Polaris will not run


Seriously, guydaigle? The 300 Xpress is a two stroke. The problem is too much fuel. Start by checking and adjusting the carb. Look at the needle & seat, then the float level.

Aug 22, 2009 | Polaris ATV

3 Answers

Polaris Xpress 300. Won't start, backfires through carb sometimes


Sounds like maybe the needle and seat in the carb letting gas through.

Jun 28, 2009 | Polaris ATV

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