2011 Arctic Cat 366SE ATV Service Manual, Page 11Get this manual
Adjusting Engine RPM (Idle) To properly adjust the idle RPM, tachometer is necessaryTo adjust idle RPM, use the following procedure1With the transmission in neutral, start the engine and warm it up to normal operating temperature2Turn the idle adjustment screw clockwise one turn past the recommended RPM setting; then turn it counterclockwise to 1250-1350 RPMNOTE: The idle adjustment screw is located on the right-hand side of the carburetor
KC0051A
4Remove the drain plug from the bottom of the engine and drain the oil into drain pan
733-441A AF920D
! WARNING
Adjust the idle to the correct RPMMake sure the engine is at normal operating temperature before adjusting the idle RPM