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Installing the spark plug

2410BA019 KN

NFit spark plug by hand

NTighten the spark plug and press on the spark plug boot firmly

NFit the shroud – see "Shroud"

If engine is down on power, difficult to start or runs poorly at idling speed, first check the spark plug.

Fit a new spark plug after approx. 100 operating hours or earlier if the electrodes are badly eroded.

Wrong fuel mix (too much engine oil in the gasoline), a dirty air filter and unfavorable running conditions (mostly at part throttle etc.) affect the condition of the spark plug. These factors cause deposits to form on the insulator nose which may result in trouble in operation.

Rewind Starter

To help prolong the wear life of the starter rope, observe the following points:

NPull the starter rope only in the direction specified.

NDo not pull the rope over the edge of the guide bushing.

NDo not pull out the rope more than specified.

NDo not allow the starter grip to snap back, guide it back into the housing slowly – see chapter on "Starting / Stopping the Engine."

Have a damaged starter rope replaced by your dealer before it breaks completely. STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer.

Storing the Machine

For periods of 3 months or longer

NDrain and clean the fuel tank in a well ventilated area.

NDispose of fuel properly in accordance with local environmental requirements.

NRun the engine until the carburetor is dry – this helps prevent the carburetor diaphragms sticking together.

NRemove the saw chain and guide bar, clean them and spray with corrosion inhibiting oil.

NThoroughly clean the machine – pay special attention to the cylinder fins and air filter.

NIf you use a biological chain and bar lubricant, e.g. STIHL BioPlus, completely fill the chain oil tank.

NStore the machine in a dry, high or locked location, out of the reach of children and other unauthorized persons.

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MS 241 C-M

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STIHL MS 241 C-M manual Rewind Starter, Storing the Machine, Installing the spark plug