Air bleed screw, which way to turn? - Snowmobile Forum: Your #1 Snowmobile Forum

COOKSTER · 11-17-2012, 05:39 PM

Quick question on Mikuni air bleed screw adjustment... If the motor takes too long to come back to idle RPMs after running at higher RPM's, which way should I turn the screw, in or out?

**kccats** · 11-17-2012, 06:05 PM

In! But have you had the carbs off, apart and the jets out? Floss the pilot jet (up the tube)

COOKSTER · 11-17-2012, 06:59 PM

Quote:

Originally Posted by kccats

In! But have you had the carbs off, apart and the jets out? Floss the pilot jet (up the tube)

Yes, I just finished with complete disassembly, cleaning and blowing out with compressed air, The sled is a 97 Puma 340 with single carb. This is my neighbors sled, he just bought it and I'm giving it a "going over" before the season. Thanks for the reply.

**BC_Dan** · 11-18-2012, 12:18 AM

Like KC said. Usually, an idle that is slow to return indicates a lean condition. Going IN will richen the air/fuel a bit and should bring the idle down faster.