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7. Maintenance procedures
7.1. Cleaning the air filter
Never use petrol or solvents with a low flash point for cleaning the air filter element as this could result in a fire
or explosion.
Danger
Remove the wing nut (no. 1, fig. C) attaching the air filter cover (no. 2, fig. C), then remove the latter.
Remove the wing nut attaching the filter.
Remove the assembly consisting of foam (no. 3, fig. C) and paper (no. 4, fig. C) elements, and separate them. Check carefully
that the two elements are not torn or pierced. Replace them if they are damaged.
Foam element (no. 3, fig. C):
A)
Wash the element in a solution of household cleaning product and warm water, then rinse thoroughly, or wash it in non-
flammable solvent or solvent with a high flash point. Leave the element to dry fully.
B) Soak the element in clean engine oil and remove the excess oil. The engine will smoke when it is started for the first time if
too much oil remains in the foam.
Paper element (no. 4, fig. C):
Tap the element lightly several times on a hard surface to remove excess dirt, or send compressed air through the filter, from the
inside outward. Never try to remove dirt using a brush. Replace the element if it is too dirty.
Carry out refitting following the reverse procedure to that used for removal.
7.2. Cleaning the sediment bowl
Close the fuel tap (no. 14, diag. A).
Position a suitable container and a funnel under the carburettor as shown in diag. D.
Unscrew the plug (no. 1, diag. D) to drain the fuel.
After draining, refit the plug.
Remove the sediment bowl (no. 1, diag. E) and the seal (no. 2, diag. E).
Wash the bowl with a non-flammable solvent or solvent with a high flash point. Dry it completely.
Refit the seal and the bowl.
Open the fuel tap and check that there are no leaks.
7.3. Renewing the motor oil
Drain the oil when the engine is still warm, to ensure that drainage is rapid and complete.
Place an appropriate container under the drain plug (no. 3, diag. B), remove the dipstick/filler plug (no. 1, diag. B) and the drain
plug.
On completion, screw in and tighten the drain plug.
Fill the engine oil sump with the recommended oil, then check the level.
Reposition the dipstick/filler plug and tighten.
After filling, check that there are no oil leaks.
Wipe off any trace of oil with a clean cloth.
7.4. Cleaning the spark arrester
Loosen the three mounting bolts (no. 1, fig. F) and (no. 2, fig. F) from the exhaust silencer (no. 3, fig. F), then remove the latter.
Loosen the four bolts (no. 4, fig. F) and (no. 5, fig. F) holding the silencer guard (no. 6, fig. F) and then remove silencer guard.
Remove the mounting bolt (no. 7, fig. F) from spark arrester (no. 8, fig. F) and place it down.
Using a wire brush, remove the carbon deposits from the spark arrester screen.
Note: The spark arrester must have no holes or cracks. Replace if necessary.
Refit the spark arrester, the guard and the exhaust silencer in the reverse order to removal.
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