Stihl TS 460 Instruction Manual - Page 36

Motor Management Setting the carburetor English / USA Exhaust emissions are controlled by the design of the fundamental engine parameters and components (e.g. carburation, ignition, timing and valve or port timing) without the addition of any major hardware. The carburetor is set by the manufacturer so that an optimum mixture of fuel and air is delivered to the engine in all operating conditions. Emissions when idling and at part-load are minimized by limiting the idle mixture. Standard setting : Check the air filter and clean or replace it if necessary : Check the spark arresting screen and clean or replace it if necessary : Let the engine warm up : Carefully screw the low speed adjusting screw (L) clockwise down onto its seat, then back off one turn counterclockwise (standard setting, L = 1) L LA Correcting the carburetor setting for high altitudes (mountains) The setting may have to be marginally corrected if the engine performance is unsatisfactory at high altitudes. : Check the standard setting : Let the engine warm up : Turn the low speed adjusting screw (L) clockwise (leaner setting) 337BA043 KN TS 460 35