Zenoah BK4310FL-S, BK3410FL-S owner manual Maintenance, Fuel Filter

8. Maintenance

■FUEL FILTER

WARNING

When you mount or dismount the fuel filter, be careful not to damage the rubber packing. A damaged rubber packing or insufficient mounting of the fuel filter will cause fuel to leak.

Check how heavily the fuel filter is clogged from the fueling port of the fuel tank every 25 hours of use.

If the fuel filter is clogged with dust, empty the fuel tank, take the fuel filter out, and clean it with a brush, etc.

If the clogging of the fuel filter cannot be removed or the fuel filter is damaged, replace it with a new one.

Part No.: T1154-85100

IMPORTANT

If the fuel filter is clogged, the engine rotation speed might not increase, or rotation fluctuations might occur.

MA5

IMPORTANT

If you use the plug wrench to start tightening the spark plug, the thread might become damaged.

■AIR COOLING VENT

WARNING

Do not put any waste into the intake air-cooling vent while the machine is in operation. It might touch the rotating part, causing danger.

MA4

		Check the intake air-cooling vent and the cooling fin of
(1)	Rubber packing	the cylinder, and remove any dirt attached thereto every
(2)	Fuel filter	25 hours of use.

IMPORTANT

If any waste or dirt is jammed between the intake air- cooling vent and the cylinder fin, the engine might overheat, causing trouble.

■SPARK PLUG

WARNING

Do not touch the spark plug with bare hands immediately after stopping the engine. The spark plug is still so hot and might cause burns.

Take out the spark plug, check the electrodes, and if contaminated, clean them with a wire brush, etc. every 25 hours of use.

When mounting the spark plug, screw the plug in with your fingers, and then tighten it with the plug wrench supplied as a standard accessory.

The spark gap should be adjusted to 0.6 to 0.7 mm.

[Tightening torque]

9.8to 11.8 N-m (100 to 120 kgf-cm)

Designated spark plug

Champion: RCJ-6Y

NGK: BPM7A

MA6

(1) Cylinder fin

(2) Intake air-cooling vent

■GEAR CASE

Supply lubricating grease to the gear case every 25 hours of use.

Designated grease

Lithium-based heat-resistant grease (#2)

[How to supply grease]

1.Remove the blade and the blade rest plate.

2.Remove the plug beside the gear case, and pour tube grease from the plug hole.

3.Stop supplying the grease when all the old grease has been pushed out from the shaft connecting hole

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