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You are watching: 1996 polaris sportsman 400 4x4 2 stroke

So ns just obtained a 96 sportsman 400 4x4 2stroke I got it on a trade man said it had actually been sit for few months and also needed a new battery well I get it home and also I drain all the gas from tank i pull carb clean it v carb cleaner and compressed air put it earlier on it fired ideal up yet was idling high I can rev it however the rpms would hang find out mine intake boots was lacking a bolt I replace it fire that up currently it idles perfect however now when try and provide it gas it just Boggs and also Boggs favor the choke is on and then it pops earlier through the exhaust deserve to anybody help me?? And also what need to my air/fuel screw be collection at and my idle screw? Please aid I’m stumped
I know enough to it is in dangerous and there are others ~ above this website that are a lot an ext knowledgeable 보다 me, however i would start the idle in ~ 1 1/2 transforms out i would uncover the organization manual and determine what the encourage idle rate is..on my 250 that is 600 +/- 200 .I would examine for a plugged muffler/spark arrestor first. If the engine was operation erratically (Cant get it to idle properly-overspeeds, etc) climate I would certainly be act a press test i beg your pardon will examine the crank seals, head and also base gaskets. I am not a veteran ATV tech (35 plus years in the Outdoor strength Equip industry) yet its funny to learn new things and also this site is awesome..
DTLMG (Dave the lawnmowwer guy)2019 Polaris Ranger EPS2014 Polaris Sportsman 570 4x42011 Polaris Sportsman 400 4x4
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600-800 rpm is fairly low on most engines - 1000 come 1200 is much more common on most, but the actual speed is much more a personal preference - every my buddies call me my CRF idles too high, but I have it there for a factor - as soon as I fall down, that lays there to run waiting because that me to choose it increase - i usually execute not have to try to restart the warm 4 hit engine which have the right to be a beast on a race bike top top a hot day.Regardless that the idle speed, the air/fuel screw ~ above a 2 stroke is frequently initially set at 1 1/2 transforms - a minor adjust might be needed once the engine has been operation for 30 minute or more, yet two strokes space not well-known for an extended smooth idle. If castle idle long sufficient to urine it"s long enough. But when the engine is hot, change the air/fuel screw in 1/2 turn increments and let idle at every adjustment for 10 to 15 seconds to observe the change before trying an additional setting. Generally, ago out till the runs turbulent (or wants to die) then turn it in till the does the exact same thing and then set it halfway in between too lean and too rich.Most bogging top top throttle opened is caused by too much air and also too small fuel. Shot spraying starting fluid right into the entry while opening the throttle - if it runs while adding fuel to the just arrive air, settle the carbohydrate - if adding fuel kills the engine and it is then tough to start, then is"s currently getting too lot fuel, settle the carbohydrate - if no readjust either way, verify the it is not shedding spark at the greater RPMs - it might be a problem with the rev limiter. Disconnect the kill wire (black wire) in ~ the CDI unit - if the problem is gone, climate it"s electrical and has nothing to execute with the carb.