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By Ryann Racho
So Id say about 2 years back I bought a 2013 Polaris Sportsman 500 H.O. off of my uncle. It ran perfectly, nothing wrong at all. I usually go mudding with it or just ride trails with buddies. So as you would assume, the quad is quite dirty from sitting for a few weeks.
STUTTERING PROBLEM: I noticed one day out of nowhere that in high gear at 15-20 MPH, I was already maxed out at 4500-5000 RPM It would get to 15-20 mph, max out on rpms and start sputtering. It sounded like it was basically acting like it couldn’t go any faster than this.
IDLING PROBLEM: I was fucking with the carberator the other day maybe thinking that is causing my sputtering, and now my idle will shoot up to 2600 on start usually, then I will turn the throttle adjustment down to the normal 1400. The rpms with then fluctuate 10-30 rpms back and forth repeatedly, it will then run for about another 30-60 seconds and the RPMs will slowly drop to about 900-1000 RPM and stall out. I replaced the carburetor and everything seems to be working perfect on that, no leaks and what not but it’s still acting strange. Also, I’ve noticed that when looking into the Electronic Throttle Control that two plates that aren’t supposed to touch have to be WAY past touching to even try to fire up. Even when set at a wide open throttle like that, I still have to give it some throttle to get it to fire up.
Here is what I have done so far:
Checked the belt and clutch
Changed out spark plug (Last one was covered in carbon)
Cleaned the intake and air box
Replaced the carburetor
Replaced the inline fuel filter
Checked that all lines on carburetor are connected into the right spots
Checked If intake boot was cracked (Not from what I can see)
Unhooked and reattached new carburetor (About 4-5 times)
Cleaned battery terminals and battery off
Shut on and off Gas Line Cutoff Valve
My next thoughts are that maybe the TPS is fucked up or maybe the Spark Arrestor is plugged with mud. I was thinking tomorrow to purge the exhaust and also check the ohms output on the TPS.
ANY HELP IS GREATLY APPRECIATED. I HAVE BEEN BATTLING THIS FOR WEEK AND REALLY WANT TO GO RIDING. THANK YOU!
By Dana Hudson
Hey everyone, hoping to get some help here... my kids 03 KTF 50 Quad has always ran great... they were riding it a couple of hours a few days ago and it died a couple of times (not normal) but started right back up. A few days later my 5 year old wanted to take it for a spin so I started it (2 pulls) and he took off.. he made it a couple hundred yards and it died and we havnt been able to start it since. I have new gas, good spark and 120 psi compression.. it will not start with starter fluid in the intake or even in the cylinder.. the fuel bowl has fuel at the carb... what am I missing? It’s driving me crazy!!
So I got this '96 Jeep Cherokee XJ that cranks but doesn't start. It's got around 180k on her but I keep everything in good shape. Batt seemed strong.
I used to drive it everyday but this past year I've driven it only about twice a week. It's been just slightly slower to start in the last couple of months, but just barely slower. Was guessing it had something to do with aging plugs or something.
Drove it yesterday and everything was normal like always, sat overnight and today it cranked but didn't catch.
Any ideas on where to start?
Working on my oldest son's buddy's 2000 Big Bear. He was having some power loss at WOT so i thought it worth while to clean the carb and put at kit in it...or at least clean the OEM jets and use the new orings that come in the kit. It starts and idles like a champ, but dies and wants to backfire with any throttle at all. I assume lean because it will run decent with the choke on. Air screw adjusted fine, nice crisp idle. This one has fuel/air screw, low speed jet, mid jet, and main jet. I was assuming just trash in the low speed circuit so pulled it and cleaned again, still does the same.
Two questions I guess:
1. Does it sound most likely trash in the off idle circuit? This one has a few more passages and jets than I'm used to...and a darn diaphragm.
2. It now really wants to leak at the bowl drain screw. It doesn't seem to tighten enough to completely stop the flow. Seat looks good, screw was dirty but cleaned up fine with a touch of 2000 grit paper. First for me. Any idea here?
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