polaris sportsman 500 Motor boggs bad when i give it gas
#101
im having the same problem, ive replaced clutch, belt, needle and seat, air filter, spark plug, cleaned the carb, i took the carb off and used rtv to get a better seal against the engine, rtv'd the entire air intake so that it is air tight etc etc... i have gas still coming out the bottom of the carb, gas spraying into the intake from the carb when i give it throttle, boggs down backfires through carb. the exaust cam has been my suspect as of late when i pulled off the cover like was said in the previos post the rocker arms move slightly and the cam moves less it is exhibiting all the symptoms of the exaust cam being worn so thats my last try before i hand it over to the dealer.
#102
There is a service bullitin that was put out on these late 90 model sportsmans about the air filter sucking to tank. My buddy had a 335 would run great then he would get on it and wouldnt throttle more than halfway and bog out it may appear to be off the tank but can while riding it actually move and suck to the tank the service guy at the polaris dealer here showed him how to cut the tube so it wouldnt suck to the tank. It may not be the problem but its worth a try.
#104
cam woes
hey yall, just wanted to say thanks for all the postings about the Sportsman 500 - just bought one with the exact same problems as described in the last 11 pages. We suspected the cam and you all confirmed it - same symptoms. If lobe is worn will be looking for a non-plaris part...any suggestions on a reasonable priced aftermarket cam and exhaust rocker? Thanks again (I love the WWW).
#106
#108
Have same problem with both of my 500 scramblers. Both will idle all day. One has black plug and smokes. Think the timing is off. Other one just recently hapened. Going to check everything i read in this forum. Hoping its just valve clearence or somthing simple. Tearing into both of them tomorrow. Will update.
#109
hey yall, just wanted to say thanks for all the postings about the Sportsman 500 - just bought one with the exact same problems as described in the last 11 pages. We suspected the cam and you all confirmed it - same symptoms. If lobe is worn will be looking for a non-plaris part...any suggestions on a reasonable priced aftermarket cam and exhaust rocker? Thanks again (I love the WWW).
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The worn Cam was a pre 2001 thing. All replacement cams are now the High duration H.O cam now on any 500,425,455, even for the pre H.O sportsmans.
#110