16
Electrode gap
The electrode gap must be 0.6 – 0.7 mm.
Cleaning the inlet port of the cooling air
Unscrew four screws (2). Remove recoil starter (3).
Clean the inlet port (4) and the cylinder fins.
Cleaning the muffler
CAUTION: If the engine is hot there is a risk of burning. Wear protective gloves.
Remove the sprocket cover (see “PUTTING INTO OPERATION”).
Remove deposits of carbon from the exhaust outlets (11) of the muffler.
Cleaning the cylinder space
Remove the sprocket cover (see “PUTTING INTO OPERATION”).
If necessary remove muffler by loosening and removing the two screws (14).
Stuff a rag into the cylinder port (15).
Use a suitable tool (wooden scraper) to clean out the cylinder space (16), especially the cooling
fins.
Remove the rag from the cylinder port and refit the muffler according to the diagram.
Replace the gasket (13) if necessary. Carefully remove any pieces of the old gasket from the muf-
fler.
Ensure correct mounting position. The cowling should follow the contour of the cylinder to
ensure correct heat transfer.
Tighten screws (14) to 10 Nm while the engine is cold.
2
3
4
11
0.6 – 0.7 mm
13
16
15
14
STOP