MA1 AIR Filter, Muffler, MA4, Spark Arrester, MA2

HEZ2450S/HEZ3050S

9. Maintenance

WARNING

•Make sure that the engine has stopped and is cool before performing any service to the machine. Contact with moving cutting head or hot muffler may result in a personal injury.

	MA1	■ AIR FILTER
	MA1	• The air filter, if clogged, will reduce the
		• The air filter, if clogged, will reduce the
		engine performance. Check and clean
		the filter element. If the element is

■MUFFLER

WARNING

• Inspect periodically, the muffler for

loose fasteners, any damage or

corrosion. If any sign of exhaust leakage is found, stop using the machine and have it repaired immediately.

•Note that failing to do so may result in the engine catching on fire.

broken or clogged, replace with a new

one. (MA1)

(1) (1) air filter

MA4

■SPARK ARRESTER

• The muffler is equipped with a spark

arrester to prevent red hot carbon from

flying out of the exhaust outlet.

Periodically inspect and clean as

necessary with a wire brush.

MA2

(1)

■FUEL FILTER

•When the engine runs short of fuel supply, check the fuel cap and the fuel filter for blockage. (MA2)

(1) fuel filter

(1)

In the State of California it is required

by law (Section 4442 of the California

Public Resources Code) to equip a

spark arrester when a gas powered tool

is used in any forest covered, brush

covered, or grass covered unimproved

land. (MA4)

MA3

.025 in

0.655mm

■SPARK PLUG

•Starting failure and mis-firing are often caused by a fouled spark plug. Clean the spark plug and check that the plug gap is in the correct range. For a replacement plug, use the correct type specified by RedMax. (MA3)

HEZ2450S: NGK CMR7H

HEZ3050S: NGK CMR7H

(1) spark arrester

■GEAR CASE

• The reduction gears are lubricated by

MA5multipurpose, lithium-based grease in the gear case. At every 25 hours of use, supply the gear case with new grease. (MA5)

•Remove the cutter holders before installing new grease to arrange for old grease to exit. (MA6)

NOTE

• When removing and installing the

IMPORTANT

•Note that using any spark plug other than those designated may result in the engine failing to operate properly or in the engine becoming overheated and damaged.

•To install the spark plug, first turn the plug until it is finger tight, then tighten it a quarter turn more with a socket wrench.

holder(A), use care not to allow any dirt

and dust entering in to the gear case.

(MA6)

TIGHTENING TORQUE:

87~104 in-lbs

(9.8~11.8 N.m.)

US-15