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Cleaning the Air Filter

Engine Management

 

Adjusting the Carburetor

 

 

 

If there is a noticeable loss of engine power

3006BA009 KN

NTurn the twist lock 90° counterclockwise.

NRemove the shroud upwards.

3009BA010 KN

NRemove the air filter upwards.

NWash the filter in STIHL special cleaner (special accessory) or a clean, non-flammable solution (e.g. warm soapy water) and then dry.

NOTICE

Do not use a brush to clean the filter. Always replace a damaged filter.

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.

General Information

The carburetor comes from the factory with a standard setting.

This setting provides an optimum fuel-air mixture under most operating conditions.

Preparations

NShut off the engine.

NCheck the air filter and clean or replace if necessary.

NCheck the spark arresting screen (not in all models, country-specific) in the muffler and clean or replace if necessary.

Different Standard Settings

Different carburetors are installed at the factory. A different standard setting is necessary for each of these carburetors.

Standard setting A

–High speed screw (H) = 3/4

–Low speed screw (L) = 1

Standard setting B

–High speed screw (H) = 3/4

–Low speed screw (L) = 1/4

32

MS 150 TC