CARBURETOR QUESTION

[Big Dave2]

Last night I took the carb of of my son's '72 Kitty Cat Snowmobile to clean it. I took the main jet off and I wasn't thinking so I didn't check out how many turns it was turned out. I am assuming that this jet cant be turned all the way back in. Anyone know where to start at with this jet? Will a couple of turns out work?

[Surface Tension]

Screw it in then back it out 3/4 turn. From there fine tune it under load.

[Big Dave2]

Thank you!

[Surface Tension]

Your welcome. You will find that on both high and low speed adjustments you will get to the point where the engine RPMs climb to their highest point. Some might think that is where the mixture should be. What is happening is that is a lean condition and you'll want to richen the mixture(turn screw out).

At idle turn hitting the highest RPM then continue to turn out till the RPMs just start to drop. This will ensure an engine that will start easy and idle correctly.

High speed setting is much the same. Get to the highest RPM and then turn out till the RPMs begin to drop. This will ensure your not running under a lean condition. Lean condition will overheat but worse yet burn a piston.

Good luck.