Mercury Snowmobiles Discussion Board

I did forget the pilot jets, plugged solid. Running quite good now.
Thanks for the help

How much are you looking to spend?

1975 Sno Twister 340 with 34/rs carbs

Carbs just rebuilt

Running on two cylinders at medium or high speed
Bogs on low speed
Will not idle without a little throttle applied
Mag side carb spitting fuel out of the overflow tubes.
How many turn should the idle and the low speed screws be set at initially?

Running on two cylinders at medium or high speed
Bogs on low speed
Will not idle without a little throttle applied
Mag side carb spitting fuel out of the overflow tubes.
How many turn should the idle and the low speed screws be set at initially?

Right now it will idle rough on only one cylinder, Its spits and backfires out of the other, I'm going to start with a carb rebuild, I just wanted to know what may be next. Where would I get a box if I need one?

Sled one has 34 with RS underneath.
Sled two has 36 with 42 underneath.
Once I get them cleaned will they run with these carbs?
Sled two has a Sno Stuff cdi box is there a better box?

What size carbs belongs on a 1975 Snotwister 340, and how do you tell what size they are?
What is the proper or best way to clean them? Is there a rebuild kit?