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11

SECTION 5: MAINTAINING YOUR TRIMMER

FIGURE 11

Spring

Bump Knob

LINE INSTALLATION

This section covers both Split-Line™ and standard
single line installation.

Always use original equipment 2.03 mm (0.080 inch)
replacement line. Line other than specified may make
the engine overheat or fail.

WARNING: Never use metal-reinforced line,
wire or rope. These can break off and become
dangerous projectiles. 

There are two methods to replace the trimming line:
• Wind the inner reel with new line
• Install a prewound inner reel

Winding the Existing Inner Reel

1.

Hold the outer spool with one hand and unscrew the
bump knob counterclockwise, Figure 11. Inspect the
bolt inside the bump knob to make sure it moves
freely. Replace the bump knob if damaged.

2.

Remove the inner reel from the outer spool, Figure 12. 

3.

Remove spring from the inner reel, Figure 12.

4.

Use a clean cloth to wipe the the inner reel, spring, shaft,
and inner surface of the outer spool, Figure 13.

FIGURE 12

Inner Reel

5.

Check the indexing teeth on the inner reel and outer
spool for wear, Figure 14. If necessary, remove burrs
or replace the reel and spool.

FIGURE 13

Outer Spool

FIGURE 14

Indexing Teeth

Outer Spool

Inner Reel

NOTE: Some maintenance procedures may require

special tools or skills. If you are unsure about
these procedures take your unit to an
authorized service dealer. 

MAINTENANCE SCHEDULE

These required maintenance procedures should be 
performed at the frequency stated in the table. They
should also be included as part of any seasonal tune-up.

MAINTENANCE REQUIRED

Fill fuel tank with correct oil and petrol mixture

Clean and re-oil air filter

Check and clean spark arrestor
Check spark plug condition and gap

Inspect exhaust port and spark arrestor screen for clogging
or obstruction to assure maximum performance levels

FREQUENCY

Before Starting Engine

Every 10 Hours

Every 25 Hours

Every 50 Hours

REFER TO

Page 8

Page 13

Page 15
Page 14

Page 15

WARNING: To prevent serious injury, never
perform maintenance or repairs with unit
running. Always perform maintenance and
repairs on a cool unit. Disconnect spark plug
wire to ensure the unit will not start.

NOTE: Maintenance, Replacement, or Repair of the

emission control devices and system may be
performed by any non-road engine repair
establishment, individual or authorized service
dealer.

In order to assure peak performance of your engine,
inspection of the engine exhaust port may be necessary
after 50 hours of operation. If you notice lost RPM, poor
performance or general lack of acceleration, this service
may be required. If you feel your engine is need of this
inspection, refer service to an authorized servicing dealer, or
establishment for repair. DO NOT attempt to perform this
process yourself as engine damage may result from
contaminants involved in the cleaning process for the port.

Summary of Contents for LT31

Page 1: ...Operator s Manual LT31 2 Cycle Petrol Trimmer IMPORTANT Read safety rules and instructions carefully before operating equipment PRINTED IN U S A PART NO 769 00828 9 03...

Page 2: ...and understand what it says Before you start assembling your new equipment please locate the model plate on the unit and copy the information from it to the space provided below The information on th...

Page 3: ...n result in personal injury to the operator and bystanders as well as damage to the unit Use only 2 03 mm 0 080 inch diameter original equipment replacement line Never use metal reinforced line wire o...

Page 4: ...ar housing or muffler These parts get extremely hot from operation When turned off they remain hot for a short time Do not operate the engine faster than the speed needed to cut trim or edge Do not ru...

Page 5: ...ng or caution May be used in conjunction with other symbols or pictographs WARNING READ OPERATOR S MANUAL Read the Operator s Manual s and follow all warnings and safety instructions Failure to do so...

Page 6: ...l D handle Cutting Head Shaft Grip Primer Bulb Choke Lever Air Filter Muffler Cover Spark Plug Shaft Tube Starter Rope Grip Line Cutting Blade Muffler Ignition Switch APPLICATIONS As a trimmer Cutting...

Page 7: ...he shaft tube so that the handle slants towards the shaft grip Figure 1 The squared bolt hole in the handle is to the right 2 Insert the shoulder bolt into the squared hole in the handle Place the was...

Page 8: ...a blended petrol or its use is unavoidable follow recommended precautions Always use fresh fuel mix per your operator s manual Always agitate the fuel mix before fueling the unit Drain the tank and r...

Page 9: ...starter rope briskly 5 times with the choke lever still in Position 1 6 Place the choke lever in Position 2 7 While squeezing the throttle control pull the starter rope briskly 1 to 3 times to start...

Page 10: ...n grass and weeds are dry The life of your cutting line is dependent upon Following the previous trimming techniques What vegetation is being cut Where vegetation is cut 10 FIGURE 8 FIGURE 9 HOLDING T...

Page 11: ...authorized service dealer MAINTENANCE SCHEDULE These required maintenance procedures should be performed at the frequency stated in the table They should also be included as part of any seasonal tune...

Page 12: ...holding the inner reel and outer spool grasp the ends and pull firmly to release the line from the holding slots in the reel FIGURE 19 Eyelets Slotted Holes For Use with Split Line or Single Line For...

Page 13: ...in the air filter will VOID the warranty 1 Remove air filter muffler cover See Removing the Air filter Muffler Cover 2 Remove the air filter from behind the air filter muffler cover Figure 22 3 Wash t...

Page 14: ...air fuel mixture This is often mistaken for an out of adjustment carburetor Check the condition of the air filter before adjusting the idle speed screw Refer to Air Filter Maintenance Adjusting the I...

Page 15: ...bolts into muffler s front side Figure 28 8 Place muffler with exhaust gasket in place and bolts inserted against the engine aligning the bolt holes Tighten the bolts to secure muffler to the engine I...

Page 16: ...t of the reach of children LONG TERM STORAGE If the unit will be stored for an extended time 1 Drain all fuel from the fuel tank into a container Do not use fuel that has been stored for more than 60...

Page 17: ...Take to an authorized service dealer for carburetor adjustment ENGINE LACKS POWER OR STALLS WHEN UNDER LOAD CAUSE ACTION Old or improperly mixed fuel Drain fuel tank Add fresh fuel mixture Improper c...

Page 18: ...rigger Approximate Unit Weight No fuel with cutting head guard and D handle 4 5 kg 10 5 lbs Cutting Mechanism Dual String Cutting Head Line Spool Bump Line Releaser Line Spool Diameter 76 2 mm 3 inche...

Page 19: ...SECTION 9 NOTES 19...

Page 20: ...OPERATOR S MANUAL PART NO 769 00828 7 03 PRINTED IN THE USA SECTION 9 NOTES Cont...

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