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Old 01-02-2012, 11:05 AM   #1 (permalink)
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polaris 600xcr, runs and starts good, bogs down at 30mph

My 1998 polaris 600xcr runs and starts great, but when I get to around 30mph the engine starts bogging down and does this intermitten rev ing thing Help.. Do I have a choke sticking? Also when its is idling, if I jiggle my throttle my sled will shut off sometimes, but not all the time. when I pull my plugs they all look good and I have spark to all of them.

Last edited by sledhead600xcr; 01-02-2012 at 11:35 AM.
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Old 01-02-2012, 11:23 AM   #2 (permalink)
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Start by cleaning the clutches and then a new belt! And check the center to centers! Get the belt as tight as possible! Also check that the motor is square to the driven( or just over square)
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Old 01-02-2012, 11:44 AM   #3 (permalink)
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the sled isnt bogging down , it's th e engine
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Old 01-02-2012, 11:49 AM   #4 (permalink)
Break out the duct tape..
 
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I would tear down the carbs and soak them over night in carb dip, use a small wire to clean out all of the small holes. A tiny piece of debris can car make the sled run terrible.
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Old 01-03-2012, 12:15 AM   #5 (permalink)
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Jiggling the throttle points to the micro switch in the throttle block.
If that is going bad of the throttle cable is too tight and the carbs not synched this will happen.
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Old 01-03-2012, 09:03 PM   #6 (permalink)
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could you explain about the mico switch and cable and sync the carbs is a little more detail? Thanks
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Old 01-04-2012, 10:57 AM   #7 (permalink)
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Carb synch is fairly easy with basic tools
You need the air box off to do it though.
Use a 1/4" drill bit (shank end) and set the slides with equal drag at the bottom. (use the idle stop screws for this step)
Then pull to WOT and check that both slides are even at the top of the throat bore. (Use the cable adjusters on top of the carb)

Then check throttle lever slack. You should have 1/8" of free play before any tension is felt.
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Old 01-04-2012, 08:09 PM   #8 (permalink)
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OK Carbs are off, I took the float bowls off, and sprayed the hell out of all the holes and the entire carb with carb cleaner, is that sufficant or do I need to soak them in carb dip ? also should I spring for new needle and seats. The repair guy down the road says he has some good ones for around $20 bucks a set, Is that a good price? Also what is the function of the miro switch and is it easy to replace? Thanks everyone for the help you all are giving me the condfidence I need to do this my self and save some cash. Snow is in the forcast for next weekend so I need to get this figured out now.
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Old 01-10-2012, 07:25 PM   #9 (permalink)
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Ok Carbs are clean and back on. also cleaned my fuel filter. It started fairly easy. now to sync the carbs. not real sure what to do with the 1/4 drill bit. im guessing I stick it in the front of the carb and adjust them so the the slide just touches the bit? Help its going to snow on thursday.
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Old 01-11-2012, 04:47 AM   #10 (permalink)
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Yep, you want an even drag when you pull it out.
Then verify that all slides are even at the top (WOT) and recheck closed drag.
This gives you an even starting point for setting the idle.
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Old 01-11-2012, 06:51 PM   #11 (permalink)
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Idle Stop screws? is it the same screw that control the idle? not sure where to find the stop screw?
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Old 01-11-2012, 08:07 PM   #12 (permalink)
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Idle Stop screws? is it the same screw that control the idle? not sure where to find the stop screw?
OK I figured it out. the screw with the spring. have that adjusted and adjusted the cables so the slide is even with the top at wot, tried to start. and no luck , it won't start. might it be flooded from all of the adjusting? waiting a half hour and going to try it again. Any other Ideas?
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Old 01-11-2012, 08:10 PM   #13 (permalink)
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when and if I do get the thing started do I let it warm up, awhile and then adjust the idle screws? and what rpm do I set the idle?
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Old 01-11-2012, 08:27 PM   #14 (permalink)
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mine is at 1500 and make sure all ur air screws are turned out the same they a a little flat head screw below and to the left of screw with the spring
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Old 01-11-2012, 09:14 PM   #15 (permalink)
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mine is at 1500 and make sure all ur air screws are turned out the same they a a little flat head screw below and to the left of screw with the spring
found the air screws, turned one all the way in and counted the turns. it was one full turn in so i adjusted them all one turn out. Still no luck getting it started. It started right up when I put the carbs back in from cleaning them. hand is getting sore from pulling the thing, so I think Im done for tonight. but it is going to snow tomorrow so I hope it will start. should I try adjusting my idle screws by counting the turns? 1/4 , 1/2, turn will that make a big diffrence? or make it start easyer?
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Old 01-12-2012, 07:10 PM   #16 (permalink)
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OK the stupid #$%?&# thing still won't start. It started right up when I reinstalled the carbs, now that I have tried to sync them it just won't go. pulled the plugs and they were soaked. we are going to finally get some snow tonight and I sure don't want to miss out on going for a run. what should I try?
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Old 01-12-2012, 08:18 PM   #17 (permalink)
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do you have spark? one thing to check.......I've done this a million times on sleds, atvs, and motorcycles.....make sure both the key and the kill switch are on..lost track of how many times ive tried to start a sled or atv with the damn switch pushed in....... I see you said your plugs looked wet, the 600xcr I just bought did the same thing to me, after sitting a few days it would not start, checked the plugs, wet, dried them out and it would catch but not start, I ended up holding the throttle wide open and it took off, could be your float level is too high, and you are flooding out the plugs, you may need to pull the carbs again and check the levels,and make sure the needle and seats are sealing good to keep excess gas from flooding your motor.
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Old 01-12-2012, 08:19 PM   #18 (permalink)
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check spark take them off the boots and use a 5/64 drill bit like befor i never had luck with a 1/4 drill bit but do it from the back side or u can call and can get more info 1-320-254-8035
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Old 01-12-2012, 09:01 PM   #19 (permalink)
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OK I got it to start. Im six full turns out on my idle adjustment screws. Im having a rough time getting it to idle. woundering if I need to adjust the air screw and which way in or out? it seems to run good now but just won't idle. maybe I need to adjust my throttle cables?
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Old 01-12-2012, 09:22 PM   #20 (permalink)
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do the drill bit from back of carbs with the screw with the sring
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