Zenoah BK4310FL-S Manuale Utente

on the side where the main pipe is installed, and
mount the plug in its original position.

4. Wipe off the pushed-out grease, and mount the blade

and the blade rest plate in their original positions.

■ FLEXIBLE SHAFT
Apply grease to the flexible shaft every 25 hours use.

1. Take out the flexible shaft while raising the stopper of

the clutch housing.

2. Take out the inner shaft, apply grease to the surface

of the inner shaft, and insert the inner shaft into the
liner.

Designated grease
Lithium-based heat-resistant grease (#2)

■ MAINTENANCE EVERY 100 HOURS
1. Remove the muffler, insert a screwdriver into the

vent, and wipe off any carbon. Also, wipe off any
carbon at the muffler outlet.

2. Further tighten all screws, bolts and fittings.
3. Make sure that no oil or grease remains between the

clutch lining and the drum. If you see any there, wipe
it off using oil-free, lead-free gasoline.

4. Remove the float chamber of the carburetor, and

clean the inside of the float chamber.

■ ADJUSTING THE ENGINE

• The idling engine speed is adjusted when this product

is shipped from the factory, but it might need to be
readjusted according to changes in operation
conditions (e.g. changes in the stability of the engine,
air density, etc.). When readjustment is necessary, try
to do so as described below. If this is difficult, contact
the shop where you bought this product, and ask it to
implement the readjustment.

• Make sure the throttle wire is parallel with the flexible

shaft. If the throttle wire is twisted, straighten it.

• If the flexible shaft is bent, the play of the throttle wire

changes. When you adjust the idling, bend the
flexible shaft and adjust the idling in a standing
position similar to the position in which you actually
use the machine.

How to adjust the idling revolution speed
Warm up the engine at a medium speed for a few
minutes after starting it. Turn the idling adjustment
screw on the carburetor body using the screwdriver
supplied as a standard accessory, and adjust the idling
revolution speed to an appropriate value (when the
throttle lever is returned to its original position, the blade
does not rotate, and the engine does not stop).