Polaris Sportsman bogs down with air box installed
Mar 12, 2009 | 09:27 PM
#13
Weekend Warrior
Joined: Mar 2009
Posts: 1
Likes: 0
Polaris Sportsman bogs down with air box installed
Is the pilot screw in the bowl or on the outside? every thing in the bowl should be tight correct????? I have a 96 sportsman 500 doing the same thing pull the air box off and it runs perfect. I turned the pilot jet out 2 1/4 and no change!! Im not to far from parting this thing out.
Mar 15, 2009 | 09:40 PM
#14
Weekend Warrior
Joined: Mar 2006
Posts: 13
Likes: 0
Polaris Sportsman bogs down with air box installed
I HAD SAME PROBLEM-IT SEEMS THAT WHEN I PUT AIR BOX ON MU UNIT WOULD NOT RUN--COME TO FIND OUT THAT WHEN I SAT DOWN ON SEAT WITH AIR BOX ON IT WOULD INTERFERE WITH CABLE GOING TO CARB-WOULD RUN FINE WITH BOX ON WITHOUT ME SITTING ON SEAT-SOUNDS CRAZY BUT THAT WAS WHAT WAS WRONG-TIGHTENED UP CABLE SO IT WOULD NOT HIT BOX
Apr 11, 2009 | 05:26 PM
#16
Trailblazer
Joined: Feb 2006
Posts: 66
Likes: 0
425 magnum problem
Anyone on this thread find a solution? I have a 425 Magnum with the same problem. Idles fine, bogs/backfires with airbox installed (with or without filter in it). Runs like hell with no airbox connected to the carb. Cleaned the carb several times, replaced the gas, checked valve lash and cam lobes (all were good). Checked compression, it's appx 65psi cold with a slow crank/weak battery. Pushing the over-ride button makes no difference at all in forward gears.
Apr 11, 2009 | 05:39 PM
#17
Pro Rider
Joined: Apr 2006
Posts: 1,407
Likes: 0
From: Wi
Anyone on this thread find a solution? I have a 425 Magnum with the same problem. Idles fine, bogs/backfires with airbox installed (with or without filter in it). Runs like hell with no airbox connected to the carb. Cleaned the carb several times, replaced the gas, checked valve lash and cam lobes (all were good). Checked compression, it's appx 65psi cold with a slow crank/weak battery. Pushing the over-ride button makes no difference at all in forward gears.
I would charge the battery and get a better reading on the compression. ive checked stuff cold and got almost good (normal readings).
Apr 30, 2009 | 08:18 PM
#18
Weekend Warrior
Joined: Apr 2009
Posts: 2
Likes: 0
Check the small sponge in the bottom of your Air Box.
Pull out and try running with the sponge out and the box lid on. I had nothing but spittin and studderin and backfire after half throttle. I took this sponge out and it runs like brand new. I went through and replaced the whole carb insides and spark plug. Then i just removed the sponge filter and bam! Runs like a charm. Hope this can help all you guys out!
May 19, 2009 | 05:58 PM
#19
Weekend Warrior
Joined: May 2009
Posts: 1
Likes: 0
From: near Cincinnati Ohio
Try running it with the entire air box assembly installed
Hello, just joined the forum. I have been rebuilding a 2000 Polaris SP500 and had the same problem. I played around with it for a while and had sputtering at half throttle and beyond with the air box installed with or without the foam air filter on. I decided to put the air box cover on and see what would happen, and it runs like new. You may not have the same problem as I did but it may help a few others out there. By the way the machine is entirely stock.