OPERATOR’S MANUAL
MightyLite 26cc String Trimmers
(ALL VERSIONS)
MightyLite 26CS
UT21506, UT21907
MightyLite 26SS
UT21546, UT21947
Your trimmer has been engineered and manufactured to our high standard for dependability, ease of operation, and operator
safety. Properly cared for, it will give you years of rugged, trouble-free performance.
WARNING: To reduce the risk of injury, the user must read and understand the operator’s manual before using
this product.
Thank you for your purchase.
SAVE THIS MANUAL FOR FUTURE REFERENCE
TABLE OF CONTENTS
Introduction ...................................................................................................................................................................... 2
General Safety Rules ........................................................................................................................................................3
Specific Safety Rules .......................................................................................................................................................3
Symbols ........................................................................................................................................................................4-5
Features .........................................................................................................................................................................6-7
Assembly .......................................................................................................................................................................8-9
Operation ...................................................................................................................................................................10-12
Maintenance ..............................................................................................................................................................13-15
Troubleshooting .........................................................................................................................................................16-17
Warranty ....................................................................................................................................................................18-20
Parts Ordering / Service ....................................................................................................................................Back Page
INTRODUCTION
This product has many features for making its use more pleasant and enjoyable. Safety, performance, and dependability
have been given top priority in the design of this product making it easy to maintain and operate.
Page 2
GENERAL SAFETY RULES
WARNING:
Read and understand all instructions. Failure to follow
all instructions listed below may result in electric shock,
fire and/or serious personal injury.
READ ALL INSTRUCTIONS
For safe operation, read and understand all instructions before
using this product. Follow all safety instructions. Failure to
follow all safety instructions listed below, can result in serious personal injury.
Do not allow children or untrained individuals to use this
unit.
Never start or run the engine in a closed or poorly ventilated
area; breathing exhaust fumes can kill.
Clear the work area before each use. Remove all objects such
as rocks, broken glass, nails, wire, or string which can be
thrown or become entangled in the cutting line or blade.
Wear safety glasses or goggles that are marked to comply
with ANSI Z87.1 standard when operating this product.
Wear heavy, long pants, boots, and gloves. Do not wear
loose fitting clothing, short pants, or go barefoot. Do not
wear jewelry of any kind.
Product users on United States Forest Service land, and in
some states, must comply with fire prevention regulations.
This product is equipped with a spark arrestor; however,
other user requirements may apply. Check with your federal,
state, or local authorities.
Never operate this unit on the operator’s left side.
Secure long hair above shoulder level to prevent entanglement
in moving parts.
Keep all bystanders, children, and pets at least 50 ft. away.
Bystanders should be encouraged to wear eye protection.
Do not operate this unit when you are tired, ill, or under the
influence of alcohol, drugs, or medication.
Do not operate in poor lighting.
Keep firm footing and balance. Do not overreach. Over-
reaching can result in loss of balance or exposure to hot
surfaces. Keep cutting attachment below waist.
To avoid hot surfaces, never operate the unit with the bottom
of the engine above waist level.
Keep all parts of your body away from any moving part.
Do not touch area around the muffler or cylinder of the unit;
these parts get hot from operation.
Always stop the engine and remove the spark plug wire be-
fore making any adjustments or repairs except for carburetor
adjustments.
Inspect the unit before each use for loose fasteners, fuel
leaks, etc. Replace any damaged parts before use.
The string head will rotate during carburetor adjustments.
It has been reported that vibrations from hand-held tools
may contribute to a condition called Raynaud’s Syndrome in
certain individuals. Symptoms may include tingling, numbness, and blanching of the fingers, usually apparent upon
exposure to cold. Hereditary factors, exposure to cold and
dampness, diet, smoking, and work practices are all thought
to contribute to the development of these symptoms. It is
presently unknown what, if any, vibrations or extent of exposure may contribute to the condition. There are measures
that can be taken by the operator to possibly reduce the
effects of vibration:
a) Keep your body warm in cold weather. When operating
the unit wear gloves to keep your hands and wrists
warm. It is reported that cold weather is a major factor
contributing to Raynaud’s Syndrome.
b) After each period of operation, exercise to
increase blood circulation.
c) Take frequent work breaks. Limit the amount of
exposure per day.
d) Keep the product well maintained, fasteners tightened
and worn parts replaced.
If you experience any of the symptoms of this condition,
immediately discontinue use and see your physician about
these symptoms.
Mix and store fuel in a container approved for gasoline. Do
not smoke while fueling or mixing fuel.
Mix fuel outdoors where there are no sparks or flames. Wipe
up any fuel spillage. Move 30 ft. away from refueling site
before starting engine.
Stop the engine and allow to cool before refueling or storing
the unit.
Allow the engine to cool; empty the fuel tank and secure the
unit from moving before transporting in a vehicle.
SPECIFIC SAFETY RULES
Replace string head if cracked, chipped, or damaged
in any way. Be sure the string head or blade is properly
installed and securely fastened. Failure to do so can cause
serious injury.
Make sure all guards, straps, deflectors, and handles are
properly and securely attached.
Use only the manufacturer’s replacement string in the
cutting head. Do not use any other cutting attachment.
To install any other brand of cutting head to this string
trimmer can result in serious personal injury.
Never operate unit without the grass deflector in place
and in good condition.
Maintain a firm grip on both handles while trimming. Keep
string head below waist level. Never cut with the string
head located over 30 in. or more above the ground.
Page 3
SYMBOLS
Some of the following symbols may be used on this product. Please study them and learn their meaning. Proper
interpretation of these symbols will allow you to operate the product better and safer.
SYMBOL NAME EXPLANATION
Safety Alert Symbol Precautions that involve your safety.
Read the Operator’s Manual
Wear Eye and Hearing Protection
Keep Bystanders Away Keep all bystanders at least 50 ft. away.
Ricochet
No Blade
Gasoline and Lubricant
To reduce the risk of injury, user must read and understand
operator’s manual before using this product.
Wear eye protection which is marked to comply with ANSI
Z87.1 as well as hearing protection when operating this
equipment.
Thrown objects can ricochet and result in personal injury or
property damage.
Do not install or use any type of blade on a product displaying this symbol.
Use unleaded gasoline intended for motor vehicle use with
an octane rating of 87 [(R + M) / 2] or higher. This product is
powered by a 2-cycle engine and requires pre-mixing gasoline
and 2-cycle lubricant.
Page 4
SYMBOLS
The following signal words and meanings are intended to explain the levels of risk associated with this product.
SYMBOL SIGNAL MEANING
DANGER:
WARNING:
CAUTION:
CAUTION:
Indicates an imminently hazardous situation, which, if not avoided, will result
in death or serious injury.
Indicates a potentially hazardous situation, which, if not avoided, could result
in death or serious injury.
Indicates a potentially hazardous situation, which, if not avoided, may result in
minor or moderate injury.
(Without Safety Alert Symbol) Indicates a situation that may result in property
damage.
SERVICE
Servicing requires extreme care and knowledge and should
be performed only by a qualified service technician. For
service we suggest you return the product to your nearest
AUTHORIZED SERVICE CENTER for repair. When servicing, use only identical replacement parts.
WARNING:
To avoid serious personal injury, do not attempt to use this
product until you read thoroughly and understand completely the operator’s manual. If you do not understand
the warnings and instructions in the operator’s manual,
do not use this product. Call Homelite customer service
for assistance.
WARNING:
The operation of any power tool can result in foreign objects being thrown into your eyes, which can
result in severe eye damage. Before beginning power tool operation, always wear safety goggles or
safety glasses with side shields and, when needed, a full face shield. We recommend Wide Vision Safety
Mask for use over eyeglasses or standard safety glasses with side shields. Always use eye protection
which is marked to comply with ANSI Z87.1.
SAVE THESE INSTRUCTIONS
Page 5
FEATURES
FEATURES
PRODUCT SPECIFICATIONS
Weight (dry)
MightyLite 26CS ...................................................................................................................................................
MightyLite 26SS ....................................................................................................................................................
String cutting width ........................................................................................................................................................17 in.
Engine displacement .......................................................................................................................................................26cc
String diameter ........................................................................................................................................................... .080 in.
7.9 lbs.
8.7 lbs.
MIGHTYLITE 26CS
starter grip
front
handle
drive shaft
housing
single line
string
head
rear
handle
throttle
trigger
curved shaft
grass deflector
engine
switch
handle
primer
choke dial
front
bulb
primer
bulb
starter grip
choke dial
rear
handle
engine
switch
throttle
trigger
dual line
string
head
drive shaft
housing
straight shaft
grass deflector
MIGHTYLITE 26SS
Fig. 1
Page 6
FEATURES
KNOW YOUR STRING TRIMMER
See Figure 1.
The safe use of this product requires an understanding of
the information on the tool and in this operator’s manual as
well as a knowledge of the project you are attempting. Before
use of this product, familiarize yourself with all operating
features and safety rules.
EZ WIND™ TAP ADVANCE SYSTEM
The EZ Wind™ Tap Advance System allows easy line advance
during trimmer operation.
GRASS DEFLECTOR
The trimmer includes a grass deflector that helps protect
you from flying debris.
TOP-MOUNTED MOTOR
The top-mounted motor improves balance and is located
away from the dust and debris of the cutting area.
Page 7
ASSEMBLY
UNPACKING
This product requires assembly.
Carefully remove the tool and any accessories from the
box. Make sure that all items listed in the packing list are
included.
Inspect the tool carefully to make sure no breakage or
damage occurred during shipping.
Do not discard the packing material until you have care-
fully inspected and satisfactorily operated the tool.
If any parts are damaged or missing, please call
1-800-242-4672 for assistance.
PACKING LIST
Trimmer Assembly
Front Handle
Curved Shaft Grass Deflector – MightyLite 26CS
Straight Shaft Grass Deflector – MightyLite 26SS
String Head Assembly
Bottle of 2-Cycle Lubricant
Operator’s Manual
FRONT HANDLE
See Figure 2.
Loosen and remove the wing nut, lock washer, washer,
and bolt from the handle.
Install the handle on the drive shaft housing at the loca-
tion indicated by the label on the shaft.
Adjust handle up or down, if necessary, to desired operat-
ing position.
Reinstall the bolt, washer, lock washer, and wing nut.
Tighten wing nut to secure.
STRING HEAD ASSEMBLY
See Figures 3 - 4.
Place the string head assembly on the end of the drive
shaft housing. Make sure the hex-shaped opening on
the string head assembly seats completely on the drive
shaft. Install the spool retainer to secure.
Install the spool retainer:
Turn the spool retainer clockwise for MightyLite 26CS.
Turn the spool retainer counterclockwise for MightyLite
26SS.
Remove the plastic seal from the string head assembly.
WARNING:
If any parts are damaged or missing, do not operate
this tool until the parts are replaced. Failure to heed this
warning could result in serious personal injury.
WARNING:
Do not attempt to modify this product or create accessories not recommended for use with this product. Any
such alteration or modification is misuse and could result
in a hazardous condition leading to possible serious
personal injury.
WARNING:
To prevent accidental starting that could cause serious
personal injury, always disconnect the engine spark plug
wire from the spark plug when assembling parts.
front
handle
bolt
spool
retainer
drive
shaft
washer
wing
nut
Fig. 2
spool
retainer
plastic
seal
string
head
assembly
drive
shaft
Fig. 3
Page 8
ASSEMBLY
For the MightyLite 26CS: Slide the string into the hous-
ing eyelet and pull outward to rotate the spool into the
cutting position.
For the MightyLite 26SS: Slide strings into the housing
eyelets and pull outward to rotate the spool into the cutting position.
Push the spool retainer down while pulling on string(s)
to manually advance the string and to check for proper
assembly of the string head.
CURVED SHAFT GRASS DEFLECTOR –
MIGHTYLITE 26CS
See Figure 5.
WARNING:
The line cutting blade on the grass deflector is sharp.
Avoid contact with the blade. Failure to avoid contact
can result in serious personal injury.
Remove the bolt, washer, and wing nut from grass
deflector.
Press the grass deflector onto the bottom of the curved
shaft as shown.
Insert the bolt through the grass deflector and the bracket
on the curved shaft.
Place the washer on the bolt.
Place the wing nut on the bolt and tighten securely.
STRAIGHT SHAFT GRASS DEFLECTOR –
MIGHTYLITE 26SS
See Figure 6.
Remove the wing nut and mounting bracket from the grass
deflector.
Assemble straight shaft grass deflector to drive shaft so
that the pin in the grass deflector fits in the locator hole
in the lower side of the drive shaft near the gear head.
Place the mounting bracket over the drive shaft so the
square tab on the mounting bracket fits into the slot in
the straight shaft grass deflector.
Rotate the mounting bracket so the screw on the grass
deflector goes into the slot on the mounting bracket.
Reinstall the wing nut and tighten securely.
strings to
26cs
flat
washer
26ss
square
tab
gear
head
pull
secure
wing
nut
wing nut
slot
slots
Fig. 4
grass
deflector
bolt
Fig. 5
mounting
bracket
drive
shaft
slot
screw
pin
grass
deflector
Fig. 6
Page 9
OPERATION
WARNING:
Do not allow familiarity with this product to make you
careless. Remember that a careless fraction of a second is
sufficient to inflict serious injury.
WARNING:
Always wear safety goggles or safety glasses with side
shields when operating power tools. Failure to do so could
result in objects being thrown into your eyes, resulting in
possible serious injury.
WARNING:
Do not use any attachments or accessories not recommended by the manufacturer of this product. The use of
attachments or accessories not recommended can result
in serious personal injury.
FUELING AND REFUELING THE TRIMMER
NOTE: Premium Exact Mix fuel mix will stay fresh up to
30 days. DO NOT mix quantities larger than usable in a 30
day period.
PREMIUM EXACT MIX (50:1)
GASOLINE LUBRICANT
1 gallon (US) 2.6 oz.
1 Liter 20 cc (20 ml)
FILLING TANK
Clean surface around fuel cap to prevent contami-
nation.
Set trimmer on its side so that the spout points up.
Loosen fuel cap slowly. Rest the cap on a clean sur-
face.
Carefully pour fuel into the tank. Avoid spillage.
Immediately replace fuel cap and hand tighten. Wipe up
any fuel spillage.
NOTE: It is normal for smoke to be emitted from a new
engine after first use.
FUEL MIXTURE
This product is powered by a 2-cycle engine and requires
pre-mixing gasoline and 2-cycle lubricant. Pre-mix unleaded
gasoline and 2-cycle engine lubricant in a clean 1 gallon
container approved for gasoline.
Recommended fuel: This engine is certified to operate on
unleaded gasoline intended for automotive use.
Mix Homelite Premium Exact Mix lubricant with gasoline
according to the instructions on the package. If Premium
Exact Mix lubricant is not available, use a high quality synthetic 2-cycle engine lubricant, mixed at 2.6 oz. per gallon
(US).
Do not use automotive lubricant or 2-cycle outboard lubricant.
WARNING:
Always shut off engine before fueling. Never add fuel to
a machine with a running or hot engine. Move at least
30 ft. from refueling site before starting engine. Do not
smoke!
Page 10
OPERATION
STARTING AND STOPPING
See Figures 7 - 8.
Trimmer should be on a flat, bare surface for starting. The
starting method differs depending on whether the engine is
cold or warm.
To start a cold engine:
Slowly press the primer bulb seven (7) times.
Rotate the choke dial clockwise to the FULL CHOKE
position.
Squeeze throttle trigger fully and continue to hold through
remaining steps.
Pull the starter grip sharply until engine attempts to run
(no more than 4 pulls).
Rotate the choke dial counterclockwise to the HALF
CHOKE position.
Pull the starter grip sharply until the engine runs.
Allow the engine to run for 10 seconds.
Rotate the choke dial counterclockwise to the RUN
position.
To start a warm engine:
Slowly press the primer bulb seven (7) times.
Pull the starter grip sharply until the engine runs.
TO STOP THE ENGINE:
See Figure 8.
Release the throttle trigger and press and hold STOP on the
engine switch.
IF ASSISTANCE IS REqUIRED STARTING
THIS PRODUCT:
Do not return this product to the retail store where it was
purchased. Please call our Customer Service Department
for any issues you may have.
For Help Call: 1-800-242-4672
primer
bulb
choke
dial
engine
switch
starter
grip
throttle
trigger
Fig. 7
primer bulb
full
choke
engine
switch
half
choke
run
OPERATING THE TRIMMER
See Figure 9.
WARNING:
Always position the unit on the operator’s right side. The
use of the unit on the operator’s left side will expose the
operator to hot surfaces and can result in possible burn
injury.
WARNING:
To avoid burns from hot surfaces, never operate unit with
the bottom of the engine above waist level.
Fig. 8
Hold the trimmer with your right hand on the rear handle
and your left hand on the front handle. Keep a firm grip with
both hands while in operation. Trimmer should be held at a
comfortable position with the rear handle about hip height.
Always operate trimmer at full throttle. Cut tall grass from the
top down. This will prevent grass from wrapping around the
shaft housing and string head which may cause damage from
overheating. If grass becomes wrapped around the string
head, STOP THE ENGINE, disconnect the spark plug wire,
and remove the grass. Prolonged cutting at partial throttle
will result in lubricant dripping from the muffler.
Page 11
OPERATION
WARNING:
Always hold the string trimmer away from your body, keeping clearance between your body and the product. Any
contact with the housing or string trimmer cutting head can
result in burns and/or other serious personal injury.
CUTTING TIPS
See Figures 9 - 10.
Avoid hot surfaces by always keeping the tool away from
your body. (Proper operating position shown in figure 9.)
Keep the trimmer tilted toward the area being cut; this is
the best cutting area.
The curved shaft trimmer cuts when passing the unit from
right to left. The straight shaft trimmer cuts when passing
the unit from left to right. This will avoid throwing debris at
the operator. Avoid cutting in the dangerous area shown
in figure 10.
Use the tip of string to do the cutting; do not force string
head into uncut grass.
Wire and picket fences cause extra string wear, even
breakage. Stone and brick walls, curbs, and wood may
wear string rapidly.
Avoid trees and shrubs. Tree bark, wood moldings, siding,
and fence posts can easily be damaged by the string.
proper operating
position
Fig. 9
mightylite 26cs
dangerous
cutting area
ADVANCING STRING USING THE EZ WIND™
TAP ADVANCE SYSTEM
String advance is controlled by tapping string head on grass
while running engine at full throttle.
Run engine at full throttle.
Tap string head on ground to advance string. String
advances each time the head is tapped.
Several taps may be required until string strikes the cut
off blade.
Resume trimming.
NOTE: If the string is worn too short you may not be able to
advance the string by tapping it on the ground. If so, STOP
THE ENGINE, and manually advance the string.
ADVANCING THE STRING MANUALLY
With the engine off, push the spool retainer down while pulling on string(s) to manually advance the string.
CUT-OFF BLADE
This trimmer is equipped with a cut-off blade on the grass
deflector. For best cutting, advance string by tapping the
string head until the string is trimmed to length by the cut-off
blade. Advance string whenever you hear the engine running
faster than normal, or when trimming efficiency diminishes.
This will maintain best performance and keep string long
enough to advance properly.
best cutting area
direction of
rotation
direction
of
rotation
mightylite 26ss
dangerous
cutting area
best cutting area
Fig. 10
Page 12
MAINTENANCE
WARNING:
When servicing, use only identical Homelite replacement
parts. Use of any other parts may create a hazard or
cause product damage.
WARNING:
Always wear safety goggles or safety glasses with side
shields during tool operation. If operation is dusty, also
wear a dust mask.
WARNING:
Before inspecting, cleaning, or servicing the machine,
shut off engine, wait for all moving parts to stop, and
disconnect spark plug wire and move it away from spark
plug. Failure to follow these instructions can result in
serious personal injury or property damage.
GENERAL MAINTENANCE
Avoid using solvents when cleaning plastic parts. Most
plastics are susceptible to damage from various types of
commercial solvents and may be damaged by their use. Use
clean cloths to remove dirt, dust, lubricant, grease, etc.
spool
retainer
insert into
string head
Fig. 11
push down
and twist to
align
Fig. 12
WARNING:
Do not at any time let brake fluids, gasoline, petroleumbased products, penetrating lubricants, etc., come in contact with plastic parts. Chemicals can damage, weaken or
destroy plastic which may result in serious personal
injury.
You can often make adjustments and repairs described here.
For other repairs, have the trimmer serviced by an authorized
service dealer.
SPOOL REPLACEMENT
EZ WIND™ TAP ADVANCE SYSTEM
NEW PREWOUND SPOOL
See Figures 11 - 12.
If replacing string only, refer to String Replacement later
in this manual.
Use only .080 in. diameter trimmer line. Use original manufacturer’s replacement string for best performance.
Stop the engine and disconnect the spark plug wire. Hold
the string head and unscrew the spool retainer.
To remove the spool retainer:
Turn the spool retainer counterclockwise for MightyLite
26CS.
Turn the spool retainer clockwise for MightyLite 26SS.
Remove the empty spool from the string head. Keep the
spring attached to the spool.
Page 13
For the MightyLite 26CS: Make sure the string is captured
in the slot on the new spool. Make sure the end of the
string is extended approximately 6 in. beyond the slot.
For the MightyLite 26SS: Make sure the two strings are
captured in the slots opposite each other on the new
spool. Make sure the end of each string is extended
approximately 6 in. beyond each slot.
Align the slot(s) on the spool to the eyelet(s) on the string
head housing. Push down and turn the spool in the necessary direction to align the slot(s).
Make sure the string head and the spool retainer are
installed on the drive shaft.
To install the spool retainer:
Turn the spool retainer clockwise for MightyLite 26CS.
Turn the spool retainer counterclockwise for MightyLite
26SS.
For the MightyLite 26CS: Slide the string into the hous-
ing eyelet and pull outward to rotate the spool into the
cutting position.
For the MightyLite 26SS: Slide strings into the housing
eyelets and pull outward to rotate the spool into the cutting position.
Push the spool retainer down while pulling on string(s)
to manually advance the string and to check for proper
assembly of the string head.
MAINTENANCE
STRING REPLACEMENT
See Figures 13 - 16.
Stop the engine and disconnect the spark plug wire. Hold
the string head and unscrew the spool retainer.
To remove the spool retainer:
Turn the spool retainer counterclockwise for MightyLite
26CS.
Turn the spool retainer clockwise for MightyLite 26SS.
Remove the spool from the string head.
NOTE: Keep the spring attached to the spool. Remove
any old string remaining on the spool.
For the MightyLite 26CS: Cut one piece of trimmer line
9 ft. long. Find the hole in the center of the spool (figure
14). Insert one end of the line into the hole. Carefully wind
the string in the direction indicated on the top of the spool.
Nearing the end of the string, slide the end of the string
into the nearest open slot on the spool. Do not overfill.
For the MightyLite 26SS: Cut one piece of trimmer line
18 ft. long. Find the middle of the string section. Loop the
string around the hook in the center of the spool (figure
15). Carefully wind the string in the direction indicated on
the top of the spool. Nearing the end of the string, slide
one end of the string into each slot of the spool. Do not
overfill.
Replace the spool and the spool retainer. Refer to Spool
Replacement earlier in this manual.
spool
slots
Fig. 13
mightylite 26cs string head
hole
CLEANING THE EXHAUST PORT
Depending on the type of fuel used, the type and amount
of lubricant used, and/or your operating conditions, the
exhaust port may become blocked with carbon deposits.
If you notice a power loss with your gas powered tool, you
may need to remove these deposits to restore performance.
We highly recommend that only qualified service technicians
perform this service.
SPARK ARRESTOR
The spark arrestor must be replaced every 50 hours or yearly
to ensure proper performance of the product. Spark arrestors may be in different locations depending on the model
purchased. Please contact the nearest service dealer for the
location of the spark arrestor for your model.
slot
hook
slot
Fig. 14
mightylite 26ss string head
Fig. 15
slots
pull
strings to
secure
Fig. 16
Page 14
MAINTENANCE
CLEANING THE AIR FILTER SCREEN
See Figures 17 - 18.
For proper performance and long life, keep air filter screen
clean.
Remove the hex nut, wavy washer, flat washer, and choke
dial cover.
Brush the air filter screen lightly to clean.
Reinstall the choke dial cover, flat washer, wavy washer,
and hex nut.
FUEL CAP
choke dial
cover
wavy
washer
WARNING:
A leaking fuel cap is a fire hazard and must be replaced
immediately.
The fuel cap contains a non-serviceable filter and a check
valve. A clogged fuel filter will cause poor engine performance. If performance improves when the fuel cap is loosened, check valve may be faulty or filter clogged. Replace
fuel cap if required.
SPARK PLUG
This engine uses a Champion RCJ6Y or equivalent spark
plug with .025 in. electrode gap. Use an exact replacement
and replace annually, or more frequently if necessary.
STORING THE TRIMMER
Clean all foreign material from the trimmer. Store it in a
well-ventilated place that is inaccessible to children. Keep
away from corrosive agents such as garden chemicals
and de-icing salts.
Abide by all Federal and local regulations for the safe
storage and handling of gasoline.
WHEN STORING 1 MONTH OR LONGER:
Drain all fuel from tank into a container approved for
gasoline. Run engine until it stops.
heX
nut
washer
brush
filter
screen
flat
filter
screen
Fig. 17
Fig. 18
Page 15
TROUBLESHOOTING
Problem Possible Cause Solution
Engine will not start. No spark.
No fuel.
Engine is flooded.
Starter rope pulls harder now than
when new.
Check spark. Remove spark plug. Reattach the spark plug cap and lay spark
plug on metal cylinder. Pull the starter
rope and watch for spark at spark plug
tip. If there is no spark, repeat test with
a new spark plug.
Push primer bulb until bulb is full of
fuel. If bulb does not fill, primary fuel
delivery system is blocked. Contact
a servicing dealer. If primer bulb fills,
engine may be flooded, proceed to
next item.
Remove spark plug, turn trimmer so
spark plug hole is aimed at the ground.
Rotate the choke dial to “RUN” position and pull starter cord 10 to 15
times. This will clear excess fuel from
engine. Clean and reinstall spark plug.
Pull starter three times with choke dial
at “RUN”. If engine does not start,
rotate choke dial to “FULL CHOKE”
position and repeat normal starting
procedure. If engine still fails to start,
repeat procedure with a new spark
plug.
Contact a servicing dealer.
Engine starts but will not accelerate. Engine requires approximately three
minutes to warm up.
Engine starts but will only run at high
speed at half choke.
Engine does not reach full speed and
emits excessive smoke.
Engine starts, runs, and accelerates
but will not idle.
Carburetor requires adjustment. Contact a servicing dealer.
Check lubricant fuel mixture.
Air filter is dirty.
Carburetor out of adjustment.
Idle speed screw on carburetor needs
adjustment.
Allow engine to completely warm up. If
engine does not accelerate after three
minutes, contact a servicing dealer.
Use fresh fuel and the correct 2-cycle
lubricant mix.
Clean air filter. Refer to Cleaning
the Air Filter Screen earlier in this
manual.
Contact a servicing dealer.
Turn idle speed screw clockwise to
increase idle speed. See figure 19.
Page 16
TROUBLESHOOTING
IDLE
ADJUSTMENT
SCREW
Problem Possible Cause Solution
String will not advance. String is welded to itself.
Not enough string on spool.
String is worn too short.
String is tangled on spool.
Engine speed is too slow.
Spool retainer hard to turn. Screw threads are dirty or damaged. Clean threads and lubricate with
Grass wraps around driveshaft housing
and string head.
Lubricant drips from muffler. Operating trimmer at part throttle.
Cutting tall grass at ground level.
Operating trimmer at part throttle.
Check lubricant/fuel mixture.
Air filter dirty.
Lubricate with silicone spray.
Install more string. Refer to String
Replacement earlier in this manual.
Pull strings while alternately pressing
down on and releasing spool retainer.
Remove string from spool and rewind.
Refer to String Replacement earlier in
this manual.
Advance string at full throttle.
grease – if no improvement, replace
the spool retainer.
Cut tall grass from the top down to
prevent wrapping.
Operate trimmer at full throttle.
Operate trimmer at full throttle.
Use fresh fuel and the correct 2-cycle
lubricant mix.
Clean air filter. Refer to Cleaning
the Air Filter Screen earlier in this
manual.
slow
fast
idle speed
screw
Fig. 19
Page 17
WARRANTY
LIMITED WARRANTY STATEMENT
Homelite Consumer Products, Inc., (“Homelite”) warrants
to the original retail purchaser that this HOMELITE brand
outdoor product is free from defect in material and
workmanship and agrees to repair or replace, at Homelite’s,
discretion, any defective product free of charge within these
time periods from the date of purchase.
Two years for all models if used for personal, family, or
household use;
90 days for any unit used for other purposes, such as
rental or commercial.
This warranty extends to the original retail purchaser
only and commences on the date of the original retail
purchase.
Any part of the this product manufactured or supplied
by Homelite and found in the reasonable judgment of
Homelite to be defective in material or workmanship will
be repaired or replaced without charge for parts and labor
by a Homelite authorized service center.
The product, including any defective part, must be returned
to an authorized service dealer within the warranty period.
The expense of delivering the product to the dealer for
warranty work and the expense of returning it back to the
owner after repair or replacement will be paid by the owner.
Homelite’s responsibility in respect to claims is limited to
making the required repairs or replacements and no claim
of breach of warranty shall be cause for cancellation or
rescission of the contract of sale of any HOMELITE brand
product. Proof of purchase will be required by the dealer
to substantiate any warranty claim. All warranty work must
be performed by a Homelite authorized service center.
This warranty is limited to ninety (90) days from the date of
original retail purchase for any HOMELITE brand product
that is used for rental or commercial purposes, or any other
income-producing purpose.
This warranty does not cover any HOMELITE brand product
that has been subject to misuse, neglect, negligence, or
accident, or that has been operated in any way contrary
to the operating instructions as specified in this operator’s
manual. This warranty does not apply to any damage to
the product that is the result of improper maintenance or
to any product that has been altered or modified. The
warranty does not extend to repairs made necessary
by normal wear or by the use of parts or accessories
which are either incompatible with the HOMELITE
brand product or adversely affect its operation,
performance, or durability. In addition, this warranty does
not cover:
A. Tune-ups – Spark Plugs, Carburetor, Carburetor
Adjustments, Ignition, Filters
B. Wear items – Bump Knobs, Outer Spools, Cutting
Lines, Inner Reels, Starter Pulleys, Starter Ropes, Drive
Belts, Tines, Felt Washers, Hitch Pins, Mulching Blades,
Blower Fans, Blower and Vacuum Tubes, Vacuum Bags
and Straps, Guide Bars, Saw Chains
Homelite reserves the right to change or improve
the design of any HOMELITE brand product without
assuming any obligation to modify any product previously
manufactured.
ALL IMPLIED WARRANTIES ARE LIMITED IN DURATION
TO THE STATED WARRANTY PERIOD. ACCORDINGLY,
ANY SUCH IMPLIED WARRANTIES INCLUDING
MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE, OR OTHERWISE, ARE DISCLAIMED IN
THEIR ENTIRETY AFTER THE EXPIRATION OF THE
APPROPRIATE TWO-YEAR, ONE-YEAR, OR NINETY-DAY
WARRANTY PERIOD. HOMELITE’S OBLIGATION UNDER
THIS WARRANTY IS STRICTLY AND EXCLUSIVELY
LIMITED TO THE REPAIR OR REPLACEMENT OF
DEFECTIVE PARTS AND HOMELITE DOES NOT ASSUME
OR AUTHORIZE ANYONE TO ASSUME FOR THEM ANY
OTHER OBLIGATION. SOME STATES DO NOT ALLOW
LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY
LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY
TO YOU. HOMELITE ASSUMES NO RESPONSIBILITY
FOR INCIDENTAL, CONSEQUENTIAL, OR OTHER
DAMAGES INCLUDING, BUT NOT LIMITED TO, EXPENSE
OF RETURNING THE PRODUCT TO AN AUTHORIZED
HOMELITE SERVICE CENTER AND EXPENSE OF
DELIVERING IT BACK TO THE OWNER, MECHANIC’S
TRAVEL TIME, TELEPHONE OR TELEGRAM CHARGES,
RENTAL OF A LIKE PRODUCT DURING THE TIME
WARRANTY SERVICE IS BEING PERFORMED, TRAVEL,
LOSS OR DAMAGE TO PERSONAL PROPERTY, LOSS
OF REVENUE, LOSS OF USE OF THE PRODUCT,
LOSS OF TIME, OR INCONVENIENCE. SOME STATES
DO NOT ALLOW THE EXCLUSION OR LIMITATION OF
INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE
ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY
TO YOU.
This warranty gives you specific legal rights, and you may
also have other rights which vary from state to state.
This warranty applies to all HOMELITE brand products
manufactured by or for Homelite and sold in the United
States and Canada.
To locate your nearest Homelite authorized service
center, dial 1-800-242-4672 or log on to our website at
www.homelite.com.
Page 18
WARRANTY
THE FOLLOWING CALIFORNIA AIR RESOURCES BOARD (CARB) STATEMENT ONLY APPLIES TO MODEL NUMBERS
REqUIRED TO MEET THE CARB REqUIREMENTS.
HOMELITE CONSUMER PRODUCTS, INC., LIMITED WARRANTY STATEMENT FOR FEDERAL AND CALIFORNIA
EMISSION CONTROL SYSTEMS NON-ROAD AND SMALL OFF-ROAD ENGINES
YOUR WARRANTY RIGHTS AND OBLIGATIONS
The U.S. Environmental Protection Agency (EPA), the California Air Resources Board
(CARB), and Homelite Consumer Products, Inc., are pleased to explain the Emissions
Control System Warranty on your 2007 model year non-road or small off-road engine.
In California, new equipment that uses small off-road engines must be designed, built,
and equipped to meet the state’s stringent anti-smog standards. In other states, new
2000 and later model year non-road engines must be designed, built, and equipped
at the time of sale to meet the U.S. EPA regulations for small non-road engines. The
non-road engine must be free from defects in materials and workmanship which
cause it to fail to conform with U.S. EPA standards for the first two years of engine
use from the date of sale to the ultimate purchaser. Homelite Consumer Products,
Inc., must warrant the emission control system on your non-road or small off-road
engine for the period of time listed above provided there has been no abuse, neglect,
or improper maintenance of your non-road or small off-road engine.
Your emission control system may include parts such as the carburetor or fuel injection
system, the ignition system, catalytic converters, fuel tanks, valves, filters, clamps,
connectors, and other associated components. Also included may be hoses, belts
and connectors, and other emission-related assemblies.
Where a warrantable condition exists, Homelite Consumer Products, Inc., will repair
your non-road or small off-road engine at no cost to you, including diagnosis, parts,
and labor performed at an authorized service center for HOMELITE® brand outdoor
products.
MANUFACTURER’S WARRANTY COVERAGE:
This product’s emissions control system is warranted for two years. If any emissionrelated part on your engine is defective, the part will be repaired or replaced by
Homelite Consumer Products, Inc., free of charge.
OWNER’S WARRANTY RESPONSIBILITIES
(a) As the non-road or small off-road engine owner, you are responsible for the performance of the required maintenance listed in your operator’s manual. Homelite Consumer
Products, Inc., recommends that you retain all receipts covering maintenance on your
non-road or small off-road engine, but Homelite Consumer Products, Inc., cannot deny
warranty solely for the lack of receipts or for your failure to ensure the performance
of all scheduled maintenance. Any replacement part or service that is equivalent in
performance and durability may be used in non-warranty maintenance or repairs,
and shall not reduce the warranty obligations of Homelite Consumer Products, Inc.
(b) As the non-road or small off-road engine owner, you should be aware, however,
that Homelite Consumer Products, Inc., may deny you warranty coverage if your
non-road or small off-road engine or a part has failed due to abuse, neglect, improper
maintenance, or unapproved modifications.
(c) You are responsible for presenting your non-road or small off-road engine to an
authorized service dealer as soon as a problem exists. The warranty repairs should
be completed in a reasonable amount of time, not to exceed 30 days.
If you have any questions regarding your warranty rights and responsibilities, you
should contact a Homelite Consumer Products, Inc., Customer Representative at
1-800-242-4672.
DEFECT WARRANTY COVERAGE REqUIREMENTS:
(a) The warranty period begins on the date the engine or equipment is delivered to
an ultimate purchaser.
(b) General Emissions Warranty Coverage. Homelite Consumer Products, Inc., warrants to the ultimate purchaser and each subsequent purchaser that your non-road or
small off-road engine is designed, built, and equipped at the time of sale to conform
with all applicable regulations adopted by the California Air Resources Board or the
United States Environmental Protection Agency; and that it is free from defects in
materials and workmanship which cause the engine to fail to conform with applicable
regulations for a period of two years from the date the non-road or small off-road
engine is purchased by the initial purchaser.
(c) The warranty on emissions-related parts will be interpreted as follows: Any
warranted part that is not scheduled for replacement as required in the Emissions
Maintenance Schedule and Warranty Parts List set forth below is warranted for two
years. If any such part (including any part that is scheduled only for regular inspection) fails during the period of warranty coverage, it will be repaired or replaced at
any HOMELITE® Authorized Service Center at no charge. Any such part repaired
or replaced under warranty will be warranted for the remaining warranty period. A
statement to the effect of “repair or replace as necessary” would not reduce the
period of warranty coverage. Any warranted part that is scheduled for replacement
as required maintenance in the Emissions Maintenance Schedule and Warranty Parts
List is warranted for the period of time prior to the first scheduled replacement point
for that part. Any such part repaired or replaced under warranty is warranted for the
remainder of the period prior to the first scheduled replacement point, and will be
repaired or replaced at any HOMELITE® Authorized Service Center for no charge
until that replacement point is reached.
Homelite Consumer Products, Inc., shall remedy warranty defects at any authorized
HOMELITE® Authorized Service Center, including any distribution center that may be
franchised to service the subject engines. Any diagnostic work done at a HOMELITE®
Authorized Service Center shall be free of charge to the owner if such work determines
that a warranted part is defective. Any manufacturer-approved or equivalent replacement part may be used for any warranty maintenance or repairs on emission-related
parts, and must be provided free of charge to the owner if the part is still under
warranty. Homelite Consumer Products, Inc., is liable for damages to other engine
components caused by the failure of a warranted part still under warranty.
Add-on or modified parts that are not exempted by the California Air Resource Board
may not be used. The use of any non-exempted add-on or modified parts will be
grounds for disallowing a warranty claim. Homelite Consumer Products, Inc., will not
be liable to warrant failures of warranted parts caused by the use of a non-exempted
add-on or modified part.
The California Air Resources Board’s Emission Warranty Parts List specifically
defines the emission-related warranted parts. (EPA’s regulations do not include a
parts list, but the EPA considers emission-related warranted parts to include all the
parts listed below.) Homelite Consumer Products, Inc., will provide any documents
that describe its warranty procedures or policies within five days upon request by
the California Air Resources Board.
EMISSIONS PARTS LIST
Emissions parts vary from product to product. Your emissions control system warranty
applies to any of the following components that may be included on your product:
(1) Fuel Metering System
(i) Carburetor and internal parts (and/or pressure regulator or fuel injection
system).
(ii) Air/fuel ratio feedback and control system.
(iii) Cold start enrichment system.
(iv) Fuel Tank.
(2) Air Induction System
(i) Controlled hot air intake system.
(ii) Intake manifold.
(iii) Air filter.
(3) Ignition System
(i) Spark Plugs.
(ii) Magneto or electronic ignition system.
(iii) Spark advance/retard system.
(4) Exhaust Gas Recirculation (EGR) System
(i) EGR valve body and carburetor spacer, if applicable.
(ii) EGR rate feedback and control system.
(5) Air Injection System
(i) Air pump or pulse valve.
(ii) Valves affecting distribution of flow.
(iii) Distribution manifold.
(6) Catalyst or Thermal Reactor System
(i) Catalytic converter.
(ii) Thermal reactor.
(iii) Exhaust manifold.
(7) Particulate Controls
(i) Traps, filters, precipitators, and any other device used to capture particulate
emissions.
(8) Miscellaneous Items Used in Above Systems
(i) Electronic controls.
(ii) Vacuum, temperature, and time sensitive valves and switches.
(iii) Hoses, belts, connectors, and assemblies.
Homelite Consumer Products, Inc., will furnish with each new engine written instruc-
tions for its maintenance and use by the owner.
The Emissions Compliance Period referred to on the Emissions Compliance label
indicates the number of operating hours for which the engine has been shown to
meet Federal emission requirements. Category C=50 hours, B=125 hours, and
A=300 hours.
Page 19
WARRANTY
CAL
L
1-800-242-4672
www
.homeli
te.com
THIS PRODUCT WAS MANUFACTURED WITH A CATALYST MUFFLER
Congratulations! You have made an investment toward protecting the environment. In order to maintain this product’s
original emission level, please refer to the maintenance section below.
EMISSIONS MAINTENANCE SCHEDULE AND WARRANTED PARTS LIST
Emissions Parts Inspect Before Clean Every Replace Clean Every Replace Every
Each Use 5 Hours Every 25 Hours 25 Hours 50 Hours
or Yearly or Yearly
CATALYTIC MUFFLER ASSEMBLY ................................................................................................................... X
AIR FILTER ASSY
includes:
Screen .............................................................. X
FUEL TANK ASSY
includes:
Fuel Lines ........................ X
Fuel Cap .......................... X
IGNITION ASSY
includes:
Spark Plug ........................................................................................ X
ALL EMISSIONS-RELATED PARTS ARE WARRANTED FOR TWO YEARS OR FOR THE PERIOD OF TIME PRIOR TO
THE PARTS FIRST SCHEDULED REPLACEMENT WHICHEVER COMES FIRST.
make the most of your purchase!
To register your Homelite product or set up your eBox™ account by regular mail, please print the following information on a 3 in. x 5 in. card or standard postcard: your name, mailing address, phone numbers, email address,
Homelite product(s) purchased with item number from package, and serial number for each product. Mail the
card to: Homelite Consumer Products, Attn. Homelite Registration, 1428 Pearman Dairy Road, Anderson, SC
29625.To receive information on our company and products, please include the following statement on your
registration card: “Send me information on your products and company using the contact information I am providing with this product registration.”
Go to www.homelite.com and register your new tool on-line.
Your product has been fully tested prior to shipment
to ensure your complete satisfaction.
For any questions about operating or maintaining
your product, call the Homelite Help Line!
Page 20
NOTES
OPERATOR’S MANUAL
MightyLite 26cc String Trimmers
MightyLite CS — UT21506, UT21907
MightyLite SS — UT21546, UT21947
(ALL VERSIONS)
WARNING:
The engine exhaust from this product contains chemicals known to the State of California to
cause cancer, birth defects or other reproductive harm.
CALIFORNIA PROPOSITION 65
• PARTS AND SERVICE
Prior to requesting service or purchasing replacement parts, please obtain your model
and serial number from the product data plate.
• MODEL NUMBER
• SERIAL NUMBER
• HOW TO OBTAIN REPLACEMENT PARTS:
Replacement parts can be purchased online at www.homelite.com or by calling
1-800-242-4672. Replacement parts can also be obtained at one of our Authorized
Service Centers.
• HOW TO LOCATE AN AUTHORIZED SERVICE CENTER:
Authorized Service Centers can be located online at www.homelite.com or by calling
1-800-242-4672.
• HOW TO OBTAIN CUSTOMER OR TECHNICAL SUPPORT:
To obtain Customer or Technical Support please contact us at 1-800-242-4672.
987000-037
3-25-08 (REV:05)
HOMELITE CONSUMER PRODUCTS, INC.
1428 Pearman Dairy Road
Anderson, SC 29625
Phone 1-800-242-4672
www.homelite.com
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