Polaris Sportsman bogs down with air box installed
Jul 11, 2018 | 08:40 PM
#71
Weekend Warrior
Joined: Jul 2018
Posts: 1
Likes: 0
just fixed my 2000 sportsman 500 bog; it would not rev out with airtube on it with no lid on it either, I would get quarter throttle then it would miss and breakup, all I did exactly was put it back together airbox lid on filter in everything tight and bam runs like a champ, don't know why it don't matter I'm up and running hope this helps.
Aug 13, 2020 | 03:11 PM
#72
Weekend Warrior
Joined: Aug 2020
Posts: 3
Likes: 0
Working on a 1998 Polaris Sportsman 500. This thing had a couple of unusual problems that baffled a few good techs. Got the starting problem, previously posted, repaired and now starts like new.
I tested this ATV with the air box removed, ran like a scalded dog at high speed, pulled some impressive wheel stands, awesome power and idled like a Cadillac. Put everything back together and it bogs badly in neutral or in gear, won't rev up.
Removed air filter, same problem. Removed air box, ran like new again.
Replaced the carb with a direct factory replacement. Float level correct, choke and throttle cables adjusted to specs. I removed the air intake tube from the air box, checked for obstructions, there were none. About 2-1/2" on the filter side and 1-1/2" on the carburetor side. I can rev the motor to 3k or 4k RPM's, slip the air intake tube over the carb air inlet and the motor practically dies. Remove the intake tube and the RPM's pick back up almost immediately. The original carburetor did the same thing and was replaced because of this.
Is it possible for jetting to be this far off on a factory replacement carburetor?
Anyone have any ideas?
I tested this ATV with the air box removed, ran like a scalded dog at high speed, pulled some impressive wheel stands, awesome power and idled like a Cadillac. Put everything back together and it bogs badly in neutral or in gear, won't rev up.
Removed air filter, same problem. Removed air box, ran like new again.
Replaced the carb with a direct factory replacement. Float level correct, choke and throttle cables adjusted to specs. I removed the air intake tube from the air box, checked for obstructions, there were none. About 2-1/2" on the filter side and 1-1/2" on the carburetor side. I can rev the motor to 3k or 4k RPM's, slip the air intake tube over the carb air inlet and the motor practically dies. Remove the intake tube and the RPM's pick back up almost immediately. The original carburetor did the same thing and was replaced because of this.
Is it possible for jetting to be this far off on a factory replacement carburetor?
Anyone have any ideas?
Any luck on getting a fix for this
Sep 8, 2020 | 02:24 PM
#73
Weekend Warrior
Joined: Sep 2020
Posts: 2
Likes: 0
I have a similar issue with my 97 Magnum 425. The only difference is that if I put my hand partially over the air intake hole after everything is put together, it will rev up again. Does anyone else have the same thing happen? Its like its just getting too much air. As long as I just block a little bit of the air intake hose, it will rev up and run just fine...
Oct 5, 2021 | 07:55 PM
#74
Weekend Warrior
Joined: Oct 2021
Posts: 1
Likes: 0
Help
I’m having the same issue with my 02 magnum 325. Changed fuel lines, carb, throttle cable, and air filter. With the air box lid off it throttles up. With it on it bogs over 1/2 throttle.
Does that mean the air box is leaking, or stopped up?
Im at a loss
thanks
Does that mean the air box is leaking, or stopped up?
Im at a loss
thanks
Jan 9, 2023 | 09:25 PM
#75
Weekend Warrior
Joined: Jan 2023
Posts: 1
Likes: 0
If you want a short tremperly fix take off the air box cover
Working on a 1998 Polaris Sportsman 500. This thing had a couple of unusual problems that baffled a few good techs. Got the starting problem, previously posted, repaired and now starts like new.
I tested this ATV with the air box removed, ran like a scalded dog at high speed, pulled some impressive wheel stands, awesome power and idled like a Cadillac. Put everything back together and it bogs badly in neutral or in gear, won't rev up.
Removed air filter, same problem. Removed air box, ran like new again.
Replaced the carb with a direct factory replacement. Float level correct, choke and throttle cables adjusted to specs. I removed the air intake tube from the air box, checked for obstructions, there were none. About 2-1/2" on the filter side and 1-1/2" on the carburetor side. I can rev the motor to 3k or 4k RPM's, slip the air intake tube over the carb air inlet and the motor practically dies. Remove the intake tube and the RPM's pick back up almost immediately. The original carburetor did the same thing and was replaced because of this.
Is it possible for jetting to be this far off on a factory replacement carburetor?
Anyone have any ideas?
I tested this ATV with the air box removed, ran like a scalded dog at high speed, pulled some impressive wheel stands, awesome power and idled like a Cadillac. Put everything back together and it bogs badly in neutral or in gear, won't rev up.
Removed air filter, same problem. Removed air box, ran like new again.
Replaced the carb with a direct factory replacement. Float level correct, choke and throttle cables adjusted to specs. I removed the air intake tube from the air box, checked for obstructions, there were none. About 2-1/2" on the filter side and 1-1/2" on the carburetor side. I can rev the motor to 3k or 4k RPM's, slip the air intake tube over the carb air inlet and the motor practically dies. Remove the intake tube and the RPM's pick back up almost immediately. The original carburetor did the same thing and was replaced because of this.
Is it possible for jetting to be this far off on a factory replacement carburetor?
Anyone have any ideas?
Thread
Thread Starter
Forum
Replies
Last Post
bzdok1234
Polaris Ask an Expert! In fond memory of Old Polaris Tech.
30
Feb 23, 2016 01:55 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)