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I have a 1999 Sportsman 500, it was running fine, than started to lose power in the winter, I adjusted the idle screw and away I went, than a few weeks ago it died, I have found that i am flooding the engine, compression was at 70PSI and due to the compression release mech. i assume i am good as it compared to the same PSI on a 2000 sportsman 500 i have. i cannot start the atv unless i go full throttle and it starts an runs for about 30 sec than dies, again it is flooded. i ordered a new carb off ebay as i could get one for around $40. put that in same issue, i have checked the timing, (good), valves out of adjustment i adjusted to .006 still same issue, i have found the exhaust lobe and rocker arm to have some wear, i have ordered new ones, but am looking for any other input in this area as well. would the exhaust cam and rocker arm cause the engine to flood? i have used a bore scope and the piston liner has good cross hatching still? any input would be great.
We have a 2wd Bear Tracker that was flooded out by a tornado and I've since been trying to get it right. I've cleared the water out of the tank and now has fresh fuel, and I've opened the carb so many times I could do it blind folded under 10min. She'll fire up as soon as you turn the key and hit the button, even on a cold start, and idles perfectly. But the second you hit the gas it bogs down and dies. I had it running GREAT for about 10-15min once and suddenly ran like shit and limped it back to the house. I've barely got it to move under its own power since. I'm at a loss at this point. Does ANYONE know of something stupid I could've missed? The carb does have a fresh rebuilt kit that I put on about a month before the flood. It was not started until it dried, I cleared the tank and opened the carb the first time. I guess I'm just gonna pull the entire thing apart again and go from there. Maybe another rebuild kit? I'm gonna swear this thing is clean though. Thanks for any ideas
So we have a 2000 BearTracker 250cc. We got hit by a tornado and it got flooded out. Water was well over the handle bars and it actually moved almost 40 yards by the water. Anyway, I've pulled the carb and drained the tank. New fuel and a "clean" carb. It fires right up first crank like it used to but bogs down after you try and give it any gas. Think it could still be a carb issue? Carb had a fresh rebuild in April and might have 10-12 hours on it since. After we got it out, It was never started until I took the carb off and cleaned it along with draining the tank. Carb has now been off twice with no differences. Any other ideas? also the water seems to never end in the exhaust. I've gotten out as much as I could but it's still steaming quite a bit like there's more in there. Could this be the problem? I've never had an ATV get flooded out like this one before. Any help or other ideas would be great. Thanks yal.