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.


1998 Arctic Cat 500 4x4 Stallling

Recommended Posts

i have issues with it dying out when i apply the throttle.it will idle all day long but as soon as i give it some throttle it acts like it is starving for gas. if i cover half of the catb it runs ok.also gas flows out of the bottom of the carb through the overflow.any suggestions or fixes for my problem?



Share this post

Link to post
Share on other sites

What year is this quad? Sounds to me like you need to rebuild/clean that carb.

Share this post

Link to post
Share on other sites

its a 98. i have taken out the jets and cleaned them.its weird because its sounds to be starving for gas but the gas flows out of overflow at the bottom of carb. could it be the accelerator pump. thats what one guy had told me. it was all working good untill i took the bowl off because of the gas leeking. ques i should of left that to someone more qualified.:huh:

Share this post

Link to post
Share on other sites

80 % of all the older Arctic Cat's running issues are in the fuel system. Theres nothing wrong with the fuel system but with the introduction of ethanol lots of problems have come up.

Hears the problem, all fuel has trash in it. Most of the trash collects on the bottom and walls of the fuel tank. What stays floating in the fuel is caught by the filters.

Now introduce ethanol, Ethanol is an outstanding cleaner!!!! All that trash that collected on the walls of the tank is now coming loose, plus the filters in the tank are deteriorated by ethanol. Just to prove it, turn off the gas valve, pull the hose, I bet it leaks.

Even the fuel line used at the time can be deteriorated by ethanol.

So, what needs to be done, luckly everything in the carb has no problem ethanol. First the carburator needs to be completly disassembled, The main parts need to be soaked in carb cleaner for 30 mim to a hour. Then flushed with hot water and blow out with compressed air. Inspect all rubber parts for deterioration and replaced if needed. Reassemble making sure to set the pilot jet and the float setting to factory spec. I can get them for you if needed.

Now, remove all the fuel hose and drain the tank, if the valve leaks replace it, there cheap. While the tank is empty look in it with a flash light. if it's got scum buildup in it, it will need to be cleaned. Install the new valve and replace the fuel lines with ethanol safe fuel hose. It is also a good idea to install a good quality in-line fuel filter.

With everything put back togeather add fresh gas and you should be good to go.

I do recommend using a good fuel stablizer for ethanol, I prefer the Yamaha Marine product fuel stablizer, It's like stablizer on steriods. Another produst I recommend is another Yamaha marine product called ring free, it is a carbon removing compound that cleans carbon from the valves, rings and piston. The stuff works.

Good luck

Share this post

Link to post
Share on other sites

thanks texas...i will try that. does it have to be the same carb put back on from factory or will another carb fit and work. like of a honda,yamaha..ect...

Share this post

Link to post
Share on other sites

It would be best with the original carb. There can be a lot of differances between carbs from one manufacture to another. ventura, jets,orfaces can be all different fom one motor to the next even though they are the same size motor.

Bore and stroke, valve size, cam lift and duration, exhaust restriction, air cleaner restriction and intake runner size and length will all effect volumetric flow rate of the carburator.

with out the correct carb you could be chasing problems forever and never get close. Plus it could be close enough to run but if to lean or to rich it could destroy the motor.

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.

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 Aleksandr Boreesenko
      doesn't idle at times but sometimes when it does as soon as I touch the throttle it just shuts off, what could possibly be the problem? I thank you very much for any help, Thanks.
    • By Dra O
      posted a while back - it was running at one point - I have all the plastic shroud off - it's down to frame and engine now
      -fuel pump: when line from petcock is attached, no fuel comes out other side to carb; the line to the carb is open (can blow through it); I thought when I cranked engine that the pump would spit out fuel on other side but it does not; I removed fuel pump and opened it up - diaphragm looks good - but internal areas had lotsa calcification build up - I cleaned this out and dried it good - the clear plastic pieces (?diaphragms) aren't broken - the spring w/ steel ball on end moves freely; am putting it back on tomorrow; but can anyone answer about the pump? isn't it supposed to pump fuel through it... to other side... to carb? puzzling
      -along with fuel pump: I replaced petcock 3 weeks ago (gas tank had rusty fuel in bottom - cleaned it out prior to new petcock); when I turn petcock arrow NOT to on or reserve, fuel comes out of line; when I turn it to on or reserve, fuel doesn't come out; puzzling
      -I don't know what's on back of fuel pump - it's a valve that has a hose coming out of it - looks like it goes to engine/carb - I haven't traced this out yet - what is it?
      -can squirt gas on air filter and engine will run for 2-3 seconds then stop - fuel in top of carb (under diaphragm) does same
      -it likely needs carb rebuild - will get to this - but something isn't allowing fuel to get from fuel pump to carb
      -I THINK it has a mikuni model x carb - diaphragm is ID 26mm  OD 68mm - hard to find inexpensive diaphragm, I guess because it's a model x
      -last thing - I replaced solenoid due to old one clicking; I HAVE to be charging the battery or it won't start/turn over - battery just goes dead; but if charging, it'll turn over nicely; i'm guessing it's a bad battery
      -any help appreciated - I've never owned an ATV before - inherited this beast from grandparent in-law
    • By NoDeer
      I have an older (1987) Yamaha Big Bear 350.  I have arthritis in my thumbs.  Is it possible to replace the accelerator with a motorcycle accelerator (ie. twisting the handgrip)?  This would be more comfortable for me due to the arthritis.
    • By Jodawg1981
      How do i find out what carb came on a 06 suzuki ozark 250? Trying to get a new carb and need to know the model number or size. I know its a mikuni. Or if anyone has one let me know
  • Similar Tagged Content

  • Recently Browsing   0 members

    No registered users viewing this page.

  • Create New...