Quantcast
Jump to content

  • Do you own an ATV? Join our Forum!

    As a member, you can post in our forums, upload your photos and videos, use and contribute to our downloads, create your own member page, add your ATV events, and even start your own ATV club to host your own club forum and gallery.  Registration is fast and you can even login with social network accounts to sync your profiles and content.

oliverstevenrjr

Polaris Magnum 425 idles fine, runs terrible

Recommended Posts

I have a 425 Magnum that idles great but seems to flood out when I rev it up, sputters, backfires a little somtimes. No water in gas, good fuel filter, carb seems to be fine, good working diaphram. Plug change makes no difference whatsoever.

Share this post


Link to post
Share on other sites


Is your choke working properly?

* Updated your thread title with manufacturer name.

Share this post


Link to post
Share on other sites

Friend

i dont know how this website works, probably never find out

i just printed this on another message

hope i can help

o.k. So it sputters and backfires, but, how the plug looks like when you change it?

This sparkplug description means a lot when working on engines and dont see it front and personal.

First, quick repair

check yar throttle cable for slack, too much is bad

eaven if it is ok, i whould recommend to open the throttle case, there is an electrical gizmo, little switch it is.

Dont remember very good, but i think the switch should remain close if you give gas, or not give gas

fire your bike

give it gas and see the switch action

you can close it by hand and may get a different output

now you may find out if and how set an adjustment for this cable

if not..

Well

more info.,.

And probably carb time..

Let me know

ps did you check for mice condominiums on the air filter box?

Did you store or did not use your bike for some time? For this one is easy

Share this post


Link to post
Share on other sites


Check the air filter, timing, valve lash, timing chain/tensioner and the inside of the carb. If it has not been run for a while, then the old gas in the carb could have gummed up. Check to see if it runs better with the choke on or off.

Share this post


Link to post
Share on other sites

No offense, but it probably runs poorly becasue polaris produces crap for the most part. Thier new 09 sportmans are much better, older ones are nothing but problems, get it running well and then sell the thing and get a quailty machine! yamaha, honda, suzuki, kawi or can am.

Share this post


Link to post
Share on other sites

PLEASE NO BRAND BASHING. if you dont have anything nice to say about Polaris or any other brand for that matter dont say it.

on another note Welcome to QuadCrazy

Share this post


Link to post
Share on other sites

Yamaha, I will re-enforce what Outlander said, there is no need to tell anyone that their ATV is crap. I have known several people who have owned Polaris ATV's and been completely satisfied with them.

Kyle, if you are having the same problems, I would take the same advise that the last guy was given, have you checked your air cleaner?

Share this post


Link to post
Share on other sites


oliverstevenrjr, how are you making out with this? What year is that 425?

Share this post


Link to post
Share on other sites

I have a 98 magnum 425 and have had similar problems. Next time it starts doing this, hold the yellow override button and see if this fixes it. works every time on mine

Share this post


Link to post
Share on other sites
I have a 425 Magnum that idles great but seems to flood out when I rev it up, sputters, backfires a little somtimes. No water in gas, good fuel filter, carb seems to be fine, good working diaphram. Plug change makes no difference whatsoever.

A gummed up carb does sound the most plausable it may sound like its getting too much gas when in fact its getting to little. Also the machine needs good air flow to run properly change the air filter. Do a compression check to check valve seat also. More tech tips at atvwheelin.com in the tech tips.

Share this post


Link to post
Share on other sites

Take the air cleaner off, rev it up and see if gas is seeping into the air box. If so, your float is stuck or your needle isn't seating properly. Polaris doesn't offer a " carb rebuild kit " for my 95 425 Magnum ... you have to buy the individual parts and peices.

Share this post


Link to post
Share on other sites

I just couldn't pass up this 98 Polaris with the automatic transmission , snow plow , brand new tires and brand new wench for $300 , he ran it a week before I got it , then it wouldn't start , I changed the stater and it idles with choke on , will not with it off , gotta really work the throttle back n forth fast to keep it running , it's got no smoke in the exhaust , so I'm thinking carb problems ? So far there's a lot of good tips here , great stuff guys thanks any good starting point , other than that yellow switch deal , I gonna try that next , already cleaned the filter n stuff , H E L P  !!!! 😂🤣😎

Edited by Chris Ryder

Share this post


Link to post
Share on other sites


Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Similar Topics

    • By BuckBilly
      Good morning to all !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
      Let's see if we can make this a daily event.
    • By K L Buck Naff
      Trying to replace the carburetor on my 2003 Bear Tracker 250. Two brand new carbs in a row from different suppliers.   Both leak fuel out over flow and intake as soon as I turn the gas on. Any ideas. Am I doing something wrong?
    • By Daryl Mann
      Hey new to the page 
      having an issue with my carb slider jamming ect just replaced the carb with a good pre owned unit and seem to be having a similar issue 
      is there a home fix for this as a posed to buying yet another carb as the quads my daily transport and stuck without it 
      thanks for looking any help great full can also forward video of the problem I’m having if needed 


    • By Steve Howard
      Ran find shut down the quad next day would start and idle when you try to accelerate it would start popping through the carb got a rebuild kit soaked it in chem clean after break down for 12 hours on slow vibrate reassembled and adjusted per manual still the same thing any help would be really appreciated thanks and happy ridding  
    • By dany desbiens
      Hello i have a Polaris 2003 sportsman 600 Polaris Sportsman OEM Gauge Speedo Speedometer Display Dash Cluster 3280425 the speedo is not working no 4*4 i can find nothing can i put a speedo 2004Speedometer Gauge Speedo
      3280431 04-08 Sportsman if it will work
  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...