2001 Yamaha Wolverine idling issue

[shaner]

My 2001 wolverine has been sitting all fall. Tried to start it and ran for a bit and quit. I opened the air box, and found a mouse nest. Then found the air filter was damaged, so Im thinking some of the nest got sucked in. I removed the carb and cleaned it, also found the diaphram had a hole in it. Replaced that and cleaned the carb. Reinstalled and it will not idle. Runs with choke on full, but not long. I try to turn off choke and it dies. If I get on the throttle right away I can keep it reved up, but very rough. Is there something I missed cleaning the carb? Had it appart twice now. Tried fiddling with the brake switch got a little better but not much. Should I try removing the brake switch? Getting very frustrated. Havent been able to use it since September. Thanks for any help!

[BioWare]

Is there old gas in the tank from sitting all year?

Check your idle screw?

Did the pilot screw fall out?

Was the carb assembled wrong?

Check all of the above.

[DirtDemon]

Yes, fresh gas is definately a must, I assume you got rid of the old stuff right? The first thing that comes to mind is that you may have the pilot screw turned all the way in. Try turning it about 1 3/4 turns out. Start the machine, then slowly turn the screw back in until you hear the motor start to stumble, then turn the screw back out until you get the idle to its highest point, set the screw there. Adjust the idle if needed from there. It is also possible that you missed something when cleaning the carb too. You must completely disassemble the carb and clean EVERYTHING, all holes and passages. Poke something through the jets to make sure they are clear, there are some very small holes in there and you must make sure they are all clear. Also, there is a vent tube that leads to a hose at the bottom of the float bowl, make sure that is clear too. Good luck.

Edited January 15, 2011 by DirtDemon

[Ajmboy]

* Added year and manufacturer to title as per forum guidelines.