MAINTENANCE
92
93
CMR6A94
95
en
Starter Unit
Use a brush to keep the cooling vents of the starter assembly free and clean of debris (Fig. 92).
WARNING: The coil spring is under tension and could fly apart causing serious injuries. Never try to disassembly or modify it.
Engine
Clean the cylinder & flywheel fins with compressed air or a brush periodically (Fig. 93). Dangerous overheating of engine may occur due to impurities on the cylinder.
WARNING: Never run the saw without all the parts, including the drivecase cover and starting housing, securely in place.
Because parts can fracture and pose a danger of thrown objects, leave repairs to the flywheel and clutch to trained Servicing Dealers.
Spark Plug
This engine uses a NGK CMR6A with .02” (0.5 mm) electrode gap (Fig. 94). Use an exact replacement and replace every six months or more frequently, if necessary.
WARNING: Never test the ignition system with igni- tion wire connector removed from spark plug or with unseated spark plug, since uncontained sparking may cause a fire. A loose connection between spark plug terminal and ignition wire connector in the boot may create arcing that could ignite combustible fumes and cause a fire.
Use only resistor type spark plugs of the approved range. Factors such as:
-too much oil in fuel mix;
-dirty air filter;
-unfavourable running conditions, e.g. operating at part load; may result in rapid deterioration of the spark plug.
Spark Arresting Muffler
The chainsaw is provided with a Spark Arrester System p.n. 50050204 (Fig. 95) complying with the requirements of SAE J335 standard; you can check the p.n. of the Spark Arrester System on the muffler itself.
WARNING: A faulty or altered spark arrester system screen can create a fire hazard.
Through normal use the screen can become dirty and should be inspected weekly and cleaned as required.
To clean:
•Allow the muffler to cool.
•Remove the two (2) muffler nuts (B).
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