1999 300 king quad starting/running issue - Suzuki ATV Forum
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post #1 of 6 Old 01-08-2019, 12:35 PM Thread Starter
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1999 300 king quad starting/running issue

Hi all, first post here.

I have a clean low mileage 1999 KQ I bought off an old guy who used it to plow his driveway. Stored inside otherwise. Love the machine so far but it’s got some sort of running issue.

It’s been a bit cranky since I got it.

Recently was out on a ride, hit a hard bump and it bogged out and died. Would start and idle but bog when revved. Changed the petcock from “on” to “reserve” and it ran ok for the rest of the day.

Went to ride it the other day and it had the same issue on “reserve” now. Once I could get the revs up I could ride it but it would bog and backfire. Only way it would start/run was with full choke.

I pulled the vacuum line on the petcock (no fuel in it that I could see), plugged it and set it to “prime” and it made no difference

It’s about -5*C now and now it won’t start, got it to run for a second or two a few times but nothing beyond that. Usually it would start at these temps with full choke no real issue.

I pulled the spark plug and it’s soaked with fuel. It seems to be sparking ok.

Does this sound like a fuel or spark problem? Any ideas guys? Got me scratching my head.

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post #2 of 6 Old 01-08-2019, 01:01 PM
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Sounds like the idle circuit in carb is blocked......time for a GOOD cleaning and rebuild kit.
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post #3 of 6 Old 01-10-2019, 08:48 AM Thread Starter
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Thanks for the reply TCIII.

Tinkering with it some more today. Can start it up first time and it will flash right up and run great for about 10-15 seconds. After that the idle slows down, almost like it's starving for fuel then it dies. Checked the fuel flow at the petcock by removing the fuel line and setting it to prime (good flow), and by removing the fuel line at the carb and rolling it over (good flow from the pump).

So it's getting good fuel flow to the carburetor, something must be going on in there as you suggest. I'm going to see what I can do with it this weekend when I get it inside. Any good source for a carb manual for these? My local shop can't get in a service manual and ordering one online is going to take a week or two to get here. Anything I can try/test without having a rebuild kit on hand? That's going to take a little while to come in as well.


Last edited by kingsquad; 01-10-2019 at 09:11 AM.
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post #4 of 6 Old 01-10-2019, 10:38 AM
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Have you tried Tradebit for the service manual? Downloads to your computer for about $15
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post #5 of 6 Old 01-24-2019, 08:00 PM
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I had one with similar a issue a little while back . The float needle was sticking . I tore down the carburetor and cleaned everything . The problem went away butt kept coming back intermittently . I bought a rebuild kit and rebuit it . No problem with it after that .
Do not know if you have the same problem . Rebuilding the carburetor is not to difficult . Getting a manual for your quad will help with this and any other issues you run into . I bought a my rebuild kit for like $25 and my manual was $14.97 . When i got mine I did a google search and found both .
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post #6 of 6 Old 01-24-2019, 08:30 PM
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Just dug through my old e-mails and found my reciets. I got a digital manual from tradebit. My carburetor rebuild kit was from race driven. I was wrong on the price it was only $17.96.
There are tons of places for carb kits. The clymer manual is about 30 bucks and digital manuals are like half that. You don't have to wait for the digital to ship either.
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