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.

KQ300cy

2001 King Quad 300, carb issues

Recommended Posts

Hi all, new to the forum, looking forward to getting some help/advice on maintaining an 18 yr old atv!  So my King Quad 300, recently started running really rough (otherwise ok til this point) at anything more than idle.  After started, choke on/off, doesn't seem to matter, it shutters (Not sure how else to explain it) really bad when given throttle.  I can let the engine run for several minutes, but this never improves.  

Fuel pump checks out ok, and I don't see any gas in the fuel pump vacuum line.  I am a novice on a carburetor, but I need to see what's going on, so after taking it apart, I have a question about this plastic part with an o-ring that is above the jet needle.  Appears as if someone rebuilt this carb, because it is extremely clean...so I am wondering if this plastic part looks to be typical for this carb...or not.  Thanks in advance for the help!

20190309_142230.jpg

20190309_163338.jpg

20190309_141704.jpg

Share this post


Link to post
Share on other sites


Welcome to Quadcrazy! I’ve attached a diagram to help you out.  That should pretty much explain things.   It may not be your exact carb but I can look that up for you in the mean time. 

C1AD0717-213F-415B-9286-95DF3178FCA5.png

F6B6E3BF-CA12-4728-838C-DC3453D23C11.jpeg

B0F48399-2DE4-4185-B7E0-CC38ADEE8ACE.jpeg

Share this post


Link to post
Share on other sites

This is a thread I will follow with interest as I too have recently bought a King Quad 300 and it is in need of some attention due to rough running.  I will be stripping the carb out in due course and cleaning in an ultrasonic cleaner so will let you know how I get on as well (after sorting out another quad)

Share this post


Link to post
Share on other sites

Yes That’s great.  Just take your time and make sure you do a thorough job.   I like to use a cheap white pilllow case on my work bench before I get into one. It helps to see any parts as well as the dirt that comes out.  I buy the cheap ones a two pack for $2 bucks at them cheap stores like odd lot or something.   

I also like to use a can of compressed air to blow everything out.  Staples or any office supply place has them.   

E013500D-57C7-4A84-ACF6-4D58DE774AA2.jpeg

Share this post


Link to post
Share on other sites
Guest

Check the charging system. At idle you should see no more than 14.5 volts. Typically the voltage should read about 14.5 volts at 2500 rpm or so, lower at idle. An over charge condition can seem like carburetor issues sometimes. Rule this out first, it will save lots of head scratching. If you don't have a volt meter just unplug the voltage regulator and see if your issues go away,quick and free to check. 

Share this post


Link to post
Share on other sites


Thank you so much for all of the info, the document on the carb breakdown has my exact one included, so thank you!  And the post regarding voltage is interesting...mainly because, my battery is dead, an I am starting it with and have my charger connected to it until the battery is replaced.  Surely is is getting a higher voltage...i will check it out.

 

Share this post


Link to post
Share on other sites

So, verified that all parts are in the carb correctly, cleaned, and reassemble/installed.  Fired it up again with the same chugging sound...smoothes out a little at idle.  I did remove the charger once started, but same result both ways.  I will try to attach a video of the sound.

Share this post


Link to post
Share on other sites

Just put a fresh plug in, no change.  I am guessing that the adjustments are fine because it was running good then this issue came up when I was riding it.  I do recall it happening, then it ran fine...then reverted back, and hasn't been the same since.

Share this post


Link to post
Share on other sites


The spark is consistent...not a big spark by any means but white and very visible.

Share this post


Link to post
Share on other sites

So, going back through the things I need again to make her run...spark-good, fuel-good...but decided to check it again... bingo!  At idle, the fuel pump works fine (almost seems like too much fuel), but when given throttle, the fuel flow stops.  Vacuum line going to pump is good, and the diaphragm in the carb looked good...so now where???

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 Tagged Content

    • By Abbeypalm
      While cruising, my 2011 750 king quad suddenly shut down. As it happened, red lights on the display flashed. Any ideas? My head lights suddenly stopped working about a week ago, if that helps. I have no power at all. Thanks 
    • By smitht18
      Looking for the rectifier.  Most bikes have near magneto.  It appears the KQ has it in front.
      Can someone tell me exactly where it is? 
      Bike not charging and magneto checks out ok
    • By Hunter19
      How are you doing guys I just joined I have a 1998 Suzuki King quad I’m having problems with high RPMs the ATV idols perfectly but soon as a throttle up it doesn’t stall but it just bogs down it has no power any suggestions thanks
    • By Clint Osborne
      2010 Suzuki king quad 750 axi 4x4 light stays on and 4x4 not working any suggestions thanks
    • By hornythrony
      Hey I have a 07 king 700 there's lots of times that the quad will stall when the fan turns on also have to bump motor 2 or 3 times before starting to start it (makes fuel pump go on 2/3 times) anyone having or had this issue?
  • Similar Topics

    • By Abbeypalm
      While cruising, my 2011 750 king quad suddenly shut down. As it happened, red lights on the display flashed. Any ideas? My head lights suddenly stopped working about a week ago, if that helps. I have no power at all. Thanks 
    • By Brennon Heflin
      So I bought a 2000 quad runner 250. I'm having some issues an wondering what it could be I replaced the pet cock valve an the fuel filter an pump inside tank I also put a voltage regulator on it. The problem I'm having is that when u give it half or more throttle it bogs down an loses power what could it be the bike is almost like new an cant figure it out any help would be great
    • By smitht18
      Looking for the rectifier.  Most bikes have near magneto.  It appears the KQ has it in front.
      Can someone tell me exactly where it is? 
      Bike not charging and magneto checks out ok
    • By Hunter19
      How are you doing guys I just joined I have a 1998 Suzuki King quad I’m having problems with high RPMs the ATV idols perfectly but soon as a throttle up it doesn’t stall but it just bogs down it has no power any suggestions thanks
    • By abi
      Hello ladies and gents. Just picked this guy up in October and getting around to doing the required maintenance to make sure everything is right before any long rides or work is done. 
      Some background: I am I believe the 4th owner, (however the 3rd didn't actually ride it). It has unknown hours or odometer due to what appears to be a common issue. 
      I have noticed the fuel gauge doesn't work (just keeps flashing empty),
      I did come across a google search that mentioned these were a common problem but was fixed by replacing the dash (seems like overkill) and another post mentioning someone attempting a fix. 
      Any particular issues on these quads to pay attention to beyond the dash ?
      Going to be replacing the rear tires, oil change, filters and plug. Anything else I should do with an unknown history such as diff flush/change ? 
      I believe there is a service manual here but I need a few more posts. Hopefully this post will drive some answers and more questions I might have. Thanks!

  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...