English

2

 

1

KN

 

0011BA002

NTurn the captive nut (1) to the left until it hangs loosely in the chain sprocket cover

NRemove the chain sprocket cover (2) with captive nut

0011BA020 KN

NPull off the spark plug boot N Unscrew spark plug

Checking the Spark Plug

 

KN

A

000BA039

 

NClean dirty spark plug.

NCheck electrode gap (A) and readjust if necessary – see "Specifications".

NUse only resistor type spark plugs of the approved range.

Rectify problems which have caused fouling of spark plug:

Too much oil in fuel mix.

Dirty air filter.

Unfavorable running conditions, e.g. operating at part load.

1

2

000BA071 KN

Warning!

To reduce the risk of fire and burn injury, use only spark plugs authorized by STIHL. Always press spark plug boot (1) snugly onto spark plug terminal (2) of the proper size. (Note: If terminal has detachable SAE adapter nut, it must be attached.) A loose connection between spark plug boot and ignition wire connector in the boot may create arcing that could ignite combustible fumes and cause a fire.

Installing the spark plug

NInstall the spark plug and connect the spark plug boot (press it down firmly) – reassembly all other parts in the reverse sequence.

40

MS 201, MS 201 C