06 700 (carb) sportsman sputtering
#11
07-05-2012, 04:40 PM
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Sorry, been at Broken Bow,Oklahoma for a few days. Every body needs a vacation,even retired people 
If the plugs are black,definitely rich from too much fuel,air cleaner dirty, clogged,etc. Did you have the float arm parallel with the carb body when you installed the new needle valve assembly? Yes there is a block off plug on the bottom of the carb at the front that you can CAREFULLY run a small drill bit through and then screw in a drywall screw and pop this plug out revealing a fuel mixture screw. Screw clockwise to close counting the turns. If more than 2 turns out,set at a base setting of two turns out from lightly seated(closed position) and try it there. You can then adjust it in or out and see how it does. If you have a carb adjuster or a small screw driver you can also fine tune this screw for best idle speed while it's running. This is mainly for the idle jet circuit (pilot jet). This mixture could be needed to be adjusted if all else has been ruled out that could be causing it to bog down a little.. OPT
If the plugs are black,definitely rich from too much fuel,air cleaner dirty, clogged,etc. Did you have the float arm parallel with the carb body when you installed the new needle valve assembly? Yes there is a block off plug on the bottom of the carb at the front that you can CAREFULLY run a small drill bit through and then screw in a drywall screw and pop this plug out revealing a fuel mixture screw. Screw clockwise to close counting the turns. If more than 2 turns out,set at a base setting of two turns out from lightly seated(closed position) and try it there. You can then adjust it in or out and see how it does. If you have a carb adjuster or a small screw driver you can also fine tune this screw for best idle speed while it's running. This is mainly for the idle jet circuit (pilot jet). This mixture could be needed to be adjusted if all else has been ruled out that could be causing it to bog down a little.. OPT
#12
07-05-2012, 05:57 PM
Polaris ATV Expert
Retired and loving it!
Retired and loving it!
You can bend the small tab on the float down a bit to raise the float height up so gas can shut off a bit quicker. The hour glass if I remember correctly is the total hrs OR the hrs have counted down for an oil change. You can toggle through with the yellow button and either reset this function to how many hrs you want between oil changes or turn it off. OPT
#13
07-06-2012, 08:01 AM
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You can bend the small tab on the float down a bit to raise the float height up so gas can shut off a bit quicker. The hour glass if I remember correctly is the total hrs OR the hrs have counted down for an oil change. You can toggle through with the yellow button and either reset this function to how many hrs you want between oil changes or turn it off. OPT
so should i try bending the tab first or the adjustment screw you told me about?
#14
07-06-2012, 08:17 AM
Polaris ATV Expert
Retired and loving it!
Retired and loving it!
Try adjusting the float tab first to make sure the float is parallel with the carb body,then if you still have some hesitation or bog,you can experiment with the carb slide needle by lowering the clip which raises the carb slide needle a bit and see if this helps. If it's worse then go the opposite way.(std needle clip position is 3rd from the top I think) Leave the adjustment screw until last if all else doesn't help the hesitation. OPT
#15
07-11-2012, 01:30 PM
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adjusted the tab and actually set the float up (had carb upside down looking at it so the float was resting). had to adjust the idle again since it was a bit low (about 100rpm). ran the atv for about 5 minutes and noticed less of a spudder but defantly had it at the 8k rpm range. before and after, no spudder. when i was done i was sitting there letting it idle and started to notice it trying to choke out and starting to blow black exhaust so i put it back in my shed so i can work on it again. think i might of adjusted the tab a bit too much so i will try to readjust as soon as it cools down. also, on the outside of the carb at the bottom of the bowl i see a screw. what does that screw do?
ps.
let me know if you want any pics. i can snap a couple with my phone and upload them so you see what i am seeing.
ps.
let me know if you want any pics. i can snap a couple with my phone and upload them so you see what i am seeing.
#16
07-11-2012, 04:12 PM
Polaris ATV Expert
Retired and loving it!
Retired and loving it!
The big knurled one is the idle speed adjuster.If you see a small screw on the bottom at the front part of the carb,then someone has removed the "tamper proof" plug and messed with the fuel mixture screw. Count the turns as you slowly turn the screw clockwise and stop when it lightly seats. If it's more than 2 turns out set it at 2 turns out as a base setting. You can then adjust it while running in or out if you have a small screw driver and small hands to where you have the best idle speed. This circuit is mainly for the fuel mixture at idle. Could be why it might be running rich. OPT
#17
07-11-2012, 05:42 PM
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i haven't seen any "tamper proof" plug. i see the idle adjustment and a screw at the very bottom of the carb on the bowl itself. screw is right where what looks to be a vaccume line with some sort of inline valve. i readjusted everything a bit ago and now i can't get the atv to run or idle right. seem to be right back where i started somehow. the carb on my atv is pretty solid. no "tamper proof" anything, solid cast.
#18
07-11-2012, 06:46 PM
Polaris ATV Expert
Retired and loving it!
Retired and loving it!
This screw is the bowl drain screw. The overflow hose ties in with the small overflow tube in the bowl. It's mainly there to drain excess fuel in case the fuel bowl level gets too high from a bad needle and seat or if float level too high. Still sounds like you are running rich if the plugs are black from carbon.. Have you checked the slide needle position or tried to lower it a notch or two to see if it helps with the stumble? OPT
#19
07-26-2012, 11:55 AM
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This screw is the bowl drain screw. The overflow hose ties in with the small overflow tube in the bowl. It's mainly there to drain excess fuel in case the fuel bowl level gets too high from a bad needle and seat or if float level too high. Still sounds like you are running rich if the plugs are black from carbon.. Have you checked the slide needle position or tried to lower it a notch or two to see if it helps with the stumble? OPT
#20
08-02-2012, 12:06 PM
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