EarthQuake 600050V User manual

Operator's Manual
Rolling String
Trimmer
600050V
600050B
OM600050V/OM600050B
R091109
© 2009 Ardisam, Inc.
All Rights Reserved.

Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
2
Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
1YEAR LIMITED WARRANTY
Terms and Conditions
Ardisam, Inc., a manufacturing company, warrants this EARTHQUAKE® ROLLING STRING TIRIMMER to be free
from defects in the material or workmanship for a period of one year from the date of purchase. During the one year
warranty of this product, Ardisam will furnish 100% parts and labor to correct any defect caused by faulty material or
workmanship. Any unit used in a commercial application is covered for a period of 90 days after purchase.
If warranty work needs to be done, contact your place of purchase or Ardisam, Inc. for an authorized service center
in your area. Ardisam will make the necessary repairs if a service center is not available. To obtain warranty service
and/or replacement instructions, you must have prior approval from Ardisam before shipping your
package to us by calling our customer service department at 800-345-6007 for a return material authori-
zation number (RMA#). All items must be shipped prepaid. Ardisam, Inc. will at no charge, repair or replace, at their
discretion, any defective part which falls under the conditions stated above.
Ardisam retains the right to change models, specifications and price without notice. This product if used as intended,
will give you years of trouble free service. We hope you will enjoy the quality of our products for years to come.
For replacement parts, phone [phone] or go online to www.GetEarthquake.com.
This warranty applies to the original owner with a proof of purchase and is not transferable. It supersedes all other warranties
either expressed or implied and all other obligations to liabilities on our part. Ardisam, Inc. does not assume, and does not
authorize any other person to assume for us, any liability in connection with the sale of our products.
The warranty applies only to products which have not been subjected to negligent use, misuse, alteration, accident
or repairs made by anyone not certified by Ardisam, Inc. This guarantee is void unless the warranty card is properly
filled out and received by Ardisam, Inc., within 30 days of purchase or go to www.GetEarthquake.com for online
registration.
REGISTRATION, SERVICE AND MAINTENANCE LOG
Record the model number and serial number in the space provided for easy reference. Warranty is valid only if the completed
registration is received by Ardisam, Inc. within 30 days of purchase. If you do not have a computer, call our customer service
department at [phone] Mondays through Fridays from 8 a.m. to 5 p.m. CST.
OWNERSHIP RECORDS
Owner’s Name:
Owner’s Address:
City: State/Province: Zip Code/Postal Code:
Model Number: Serial Number:
Date of Purchase:
Notes:

Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
3
INTRODUCTION
Congratulations on your investment in quality. Thank you for purchasing an Earthquake String Trimmer from
Ardisam, Inc. We have worked to ensure that the string trimmer meets the highest standards for usability and
durability. With proper care, your string trimmer will provide many years of service. Earthquake reserves the right
to change, alter or improve the product and this document at any time without prior notice.
Please read this entire manual before installation and use. Earthquake reserves the right to change, alter
or improve the product and this document at any time without prior notice.
CONTENTS
Registration and Warranty.................................................................................. 2
Introduction/Contents...................................................................................... 3
Operation Safety ........................................................................................... 4
Assembly ................................................................................................... 7
Know Your String Trimmer .................................................................................. 9
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Servicing and Adjustment .................................................................................14
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Slope Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Service Parts and Parts Explosions ........................................................................22
This Instruction Book contains information for several models. Read and keep this book for future reference.
This book contains important information on SAFETY, ASSEMBLY, OPERATION, AND MAINTENANCE. The
owner must be certain that all the product information is included with the unit. This information includes
the INSTRUCTION BOOKS, the REPLACEMENT PARTS and the WARRANTIES. This information must be in-
cluded to make sure state laws and other laws are followed.

Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
4
Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
OPERATION SAFETY
This is the safety alert symbol.
It is used to alert you to potential personal injury
hazards. Obey all safety messages that follow this
symbol to avoid possible injury or death. The safe-
ty alert symbol is used with a signal word (DANGER,
CAUTION, WARNING), a pictorial and/or a safety
message to alert you to hazards.
WARNING
INDICATES A HAZARD WHICH, IF NOT AVOIDED,
COULD RESULT IN DEATH OR SERIOUS INJURY
AND/ OR PROPERTY DAMAGE.
CAUTION
INDICATES A HAZARD WHICH, IF NOT AVOIDED,
COULD RESULT IN DEATH OR SERIOUS INJURY
AND/ OR PROPERTY DAMAGE.
WARNING
READ ALL INSTRUCTIONS BEFORE
USE. FAILURE TO FOLLOW ALL IN
STRUCTIONS MAY RESULT IN SE
RIOUS INJURY TO THE OPERATOR
OR TO BYSTANDERS
Owner’s Information
Know your product: If you understand the unit and how
the unit operates, you will get the best performance. As
you read this manual, compare the illustrations to the
unit. Learn the location and the function of the controls.
To help prevent an accident, follow the operating
instructions and the safety rules.
Keep this manual for future reference.
NOTE: All images shown in this manual of your
rolling string trimmer are of 600050V. The
600050B model has slight variations.
The responsibility of the owner is to follow the instruc-
tions below.
SAFE OPERATION PRACTICES
General Operation
1. Read, understand, and follow all instructions on the
machine and in the manual(s). Be thoroughly familiar with
the controls and the proper use of the trimmer before
starting.
2. Familiarize yourself with all of the safety and operating
decals on this equipment and on any of its attachments
or accessories.
3. Do not put hands or feet near or under rotating parts.
4. Only allow responsible individuals, who are familiar with
the instructions, to operate the trimmer.
5.Thoroughly inspect the area where the machine is to be
used and remove all foreign objects.Your equipment can
propel small objects at high speed causing personal injury
or property damage. Stay away from breakable objects,
such as house windows, automobile, greenhouses, etc.
6. Keep the area of operation clear of all persons, particularly
small children, and pets.
7. Wear appropriate clothing such as a long-sleeved shirt
or jacket. Also wear long trousers or slacks. Do not wear
shorts.
8. Do not wear loose clothing or jewelry. They can get
caught in moving parts.
9. Always wear safety goggles or safety glasses with side
shields when operating trimmer to protect your eyes from
foreign objects which can be thrown from the unit.
10. Always wear work gloves and sturdy footwear.
Wear footwear that will improve footing on slippery
surfaces. Leather work shoes or short boots work well
for most people.These will protect the operator’s ankles
and shins from small sticks, splinters, and other debris.
THIS CUTTING MACHINE IS CAPABLE OF
THROWING OBJECTS.
WARNING
THE ENGINE EXHAUST FROM THIS PROD
UCT CONTAINS CHEMICALS KNOWN TO THE
STATE OF CALIFORNIA TO CAUSE CANCER,
BIRTH DEFECTS, OR OTHER REPRODUCTIVE
HARM.
WARNING

Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
5
A: Warning!
B: Read Owner's Manual Before Operating Machine
C: Do Not Operate While Others Are Around
D: Remove Objects that Could Be Thrown By This Machine.
E: Never Operate Machine Up and Down Slopes, ALWAYS
Operate Trimmer Across Slopes
F: Be Aware of Moving and Rotating Parts
G: Wear Ear and Eye Protection At All Times
H: Do Not Service or Adjust Moving Parts Unless Engine is
Stopped and Spark Plug Wire is Disconnected.
I: Look Behind and Around you Before and While Moving
Backwards.
J: Toxic Fumes—Do Not Operate in Unventilated Areas
K: Hot Surfaces
L: Fire Hazards.
Hazard Symbols and Meanings
11. It is advisable to wear protective headgear to
prevent the possibility of being struck by small flying
particles, or being struck by low hanging branches,
twigs, or other objects which may be unnoticed by
the operator.
12. Do not operate the trimmer without proper guard or
other safety protective devices in place.
13. Use this equipment for its intended purpose only.
14. See manufacturer’s instructions for proper operation
and installation of accessories. Only use accessories
approved by the manufacturer.
15. Operate only in daylight or good artificial light.
16. Do not operate product when fatigued or under
the influence of alcohol, drugs or other medication
which can cause drowsiness or affect your ability to
operate this machine safely.
17. Never operate trimmer in wet grass. Always be sure
of your footing; keep a firm hold on the handle and
walk; never run.
18. Before each use, inspect the throttle control lever
and cable. Make sure that the cable is free and that
the lever is not damaged. Also check the cable
linkage running to the carburetor for kinks, loose
fittings, and obstructions. Verify that the control bail
is working properly.
19. Stop the rotating trimmer head when crossing gravel
drives, walks, or roads. Wait for the cutting lines to
stop rotating.
20. Watch for traffic when operating near, or when
crossing roads.
21. Stop the engine (motor) whenever you leave the
equipment, before cleaning, repairing or inspecting
the unit, be sure the trimmer head and all moving
parts have stopped. Let the engine cool, disconnect
the spark plug wire and move it away from the spark
plug.
22. If the equipment should start to vibrate abnormally,
stop the engine (motor), disconnect the spark plug
wire and prevent it from touching the spark plug.
Check immediately for cause. Vibration is generally a
warning of trouble.
23. After striking a foreign object, stop the engine (mo-
tor). Remove the wire from the spark plug. Inspect
the trimmer for damage. If damaged, repair before
starting and operating the trimmer.
24. Never leave the trimmer unattended when the
engine is running. Remove the wire from the spark
plug.
25. Regularly inspect the trimmer. Make sure parts are
not bent, damaged or loose.
26. Allow muffler and engine areas to cool before
touching. Never pick up or carry the trimmer while
the engine is running.
27. Prolonged exposure to noise and vibration from
gasoline engine powered equipment should be
avoided. Take intermittent breaks and/or wear ear
protection from engine noise as well as heavy work
gloves to reduce vibration in the hands.
SAFETY WARNING SYMBOLS
CONTROL AND OPERATING SYMBOLS
Pictured below are control and operating symbols on the
unit or in this manual. Before you operate your unit, learn
and understand the purpose for each symbol.
Pictured below are safety and hazard symbols on the unit
or in this manual. Before you operate your unit, learn and
understand the purpose for each symbol.
A
H
G
F
DCB E
L
KJ
I

Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
6
Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
Slope Operation
Slopes are a major factor related to slip and fall accidents
which can result in severe injury. All slopes require extra
caution. If you feel uneasy on a slope, do not trim it. Do
trim across the face of slopes; never up and down. Do
not trim excessively steep slopes (maximum 15 degrees)
or areas where the ground is very rough. See the “Guide”
in the back of this manual to check a slope. Exercise
extreme caution when changing direction on slopes.
• Do remove objects such as rocks, tree limbs, etc.
• Do watch for holes, ruts, or bumps. Tall grass can hide
obstacles.
• Do not trim near drop-offs, ditches, or embankments.
The operator could lose footing or balance.
• Do not trim excessively steep slopes.
• Do not trim on wet grass. Reduced footing could
cause slipping.
Children
Tragic accidents can occur if the operator is not alert to
the presence of children. Children are often attracted to
the trimmer and the trimming activity. Never assume
that children will remain where you last saw them.
1. Keep children out of the trimming area and under the
watchful care of a responsible adult.
2. Be alert and turn trimmer off if children enter the area.
3. Before and while moving backwards, look behind and
down for small children.
4. Never allow children to operate the trimmer.
5. Use extra care when approaching blind corners, shrubs,
trees, or other objects that may obscure vision.
Service
1. Use extra care in handling gasoline and other fuels.
They are flammable and vapors are explosive.
A. Use only an approved container.
B. Never remove gas cap or add fuel with the engine
running. Allow engine to cool before refueling. Do
not smoke.
C. Fill fuel tank outdoors with extreme care. Never
fill fuel tank indoors or near appliances with pilot
lights, heaters, or other ignition sources. Replace
fuel cap securely. If fuel is spilled, do not start the
engine but move product and fuel container from
area. Clean up spilled fuel and allow to evaporate.
D. Never store the machine or fuel container inside
where there is an open flame (such as a water
heater), or other ignition source.
E. If the fuel has to be drained, this should be done
outdoors. The drained fuel should be stored in a
container specifically designed for fuel storage or it
should be disposed of carefully.
2. Never run an engine indoors or inside a closed
area. The exhaust fumes are dangerous, containing
CARBON MONOXIDE, an ODORLESS and DEADLY gas.
3. Never make adjustments or repairs with the engine
(motor) running. Disconnect the spark plug wire, and
keep the wire away from the plug to prevent acciden-
tal starting (remove the ignition key if equipped with
an electric start). Always wear eye protection when
you make adjustments or repairs.
4. Check the trimmer head and engine mounting bolts
at frequent intervals for proper tightness.
5. Keep all nuts and bolts tight and keep equipment
in good condition. Check mounting hardware on
trimmer head every time you change trimmer line
and prior to each use.
6. Never tamper with safety devices. Check their proper
operation regularly.
7. When servicing or repairing the trimmer, do not tip
the machine over or up unless specifically instructed
to do so in this Manual. Service and repair procedures
can be done with the trimmer in an upright position.
Some procedures will be easier if the machine is lifted
on a raised platform or working surface.
8. To reduce fire hazard, keep trimmer free of grass,
leaves, or other debris build-up. Clean up oil or fuel
spillage. Allow trimmer to cool before storing.
9. Stop and inspect the equipment if you strike an
object. Repair, if necessary, before restarting.
10. Always disconnect spark plug wire before cleaning,
repairing, or adjusting.
11. Do not change the engine governor setting or
over-speed the engine.
12. Clean and replace safety and instruction decals as
necessary.
13. To guard against engine over-heating, always have
engine debris filter mounted and clean.
14. Inspect trimmer before storage. When not in use,
disconnect spark plug lead and store indoors in a dry
place locked or otherwise inaccessible to children.
15. Use only original equipment or authorized replace-
ment parts.
16. Never replace the cutting lines with metal parts.

Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
7
ASSEMBLY
Tools Required:
1 Knife to cut carton
1 T-handle Wrench
1 Wrench to assemble tires
WARNING
ALWAYS WEAR SAFETY GLASSES OR EYE
SHIELDS WHILE ASSEMBLING THE TRIMMER.
WARNING
BEFORE DOING ANY ASSEMBLY OR MAINTE
NANCE TO THE TRIMMER, REMOVE THE WIRE
FROM THE SPARK PLUG.
Figure 1-Your new trimmer as it is shipped to you
The image in Figure 1 above shows the trimmer as it is
positioned and assembled for shipment.
To Attach the Tires
Attach the tires by inserting the spacer, the washer and
the wheel. Secure and tighten by using the axle nuts
provided
Figure 2: Assembling tires
To Remove the Trimmer from the Carton
1. Remove any of the loose parts in packaging, including
the parts bag, from the carton.
2. Remove the packing material positioned around the
unit.
3 Cut down all four corners of the carton and lay the
side panels flat.
4. Pull the trimmer out of the carton.
5 Remove packing material from around the trimmer
head.
6. Remove protective plastic from front of frame.
7. Remove protective material from wheel axle.
CONTENTS OF PARTS BAG
1 - Owner’s Manual; and 1 - Parts Bag
T-Handle
Wrench
Safety
Glasses
Two Sets of
Trimmer Lines

Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
8
Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
ENGINE PREPARATION
WARNING
FOLLOW THE ENGINE MANUFACTURER’S IN
STRUCTIONS FOR THE TYPE OF GASOLINE
AND OIL TO USE.
ALWAYS USE A SAFETY GASOLINE CONTAIN
ER. DO NOT SMOKE WHEN ADDING GASO
LINE TO THE ENGINE.
WHEN INSIDE AN ENCLOSURE, DO NOT FILL
WITH GASOLINE. BEFORE YOU ADD GASO
LINE, STOP THE ENGINE. LET THE ENGINE
COOL FOR SEVERAL MINUTES.
See the engine manufacturer’s instructions for the type
of gasoline and oil to use. Before you use the unit, read
the information on safety, operation, maintenance, and
storage.
Note: Engine does not contain OIL or GASOLINE.
Fill Crankcase With Oil
1. Remove the oil fill cap/dipstick. SEE FIGURE 4. Fill
the crankcase to the FULL line on oil fill cap/dipstick.
DO NOT OVERFILL.
2. Install the oil fill cap/dipstick and tighten securely.
Fill Fuel Tank With Gasoline
See the engine manufacturer’s instructions for the Type
of gasoline to use.
Note: Actual sustained horsepower will likely be
lower due to operating limitations and environ-
mental factors.
How to Raise the Handle
1. Hold the handle with one hand and loosen both
handle adjustment knobs until the ratchet teeth are
disengaged. Do not remove the handle adjustment
knobs.
2. Raise the handle to the operating position.
3. Stand in the operator’s position behind the trimmer.
Put the handle in a comfortable position. Make sure
both sides of the handle are level.
NOTE: Make sure the cables are not caught
between the upper and lower handle.
4. Tighten the handle adjustment knobs. Make sure the
handle pivots are locked in place.
NOTE: The handle height is adjustable. See “How
To Adjust The Height Of The Handle” in the Adjust-
ment section.
5. To attach the recoil start handle to the rope guide,
twist the rope through the rope guide mounted on
the right side of the handle. SEE FIGURE 3.
Figure 3: Adjusting the handle bars.
Handle
Rope
Guide
Recoil Start
Handle
Handle
Pivot
Handle
Adjustment Knob
Figure 4: Filling the engine with fuel and oil.
Fuel Cap
Oil Fill Cap/
Dipstick

Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
9
KNOW YOUR STRING TRIMMER
Read this owner’s manual and safety rules before operating your trimmer. Take time to compare the following
illustration with the washer to familiarize yourself with the product and its controls. Save this manual for future
reference.
Trimmer Head Drive Lever - Engages the rotation of
the trimmer head.
Control Bail - Release to stop the rotation of the trim-
mer head.
Throttle Control Lever - Controls the speed or stops the
engine.
Primer Button - Injects fuel directly into the carburetor
manifold for faster starts (600050B models only )
Recoil Starter Handle - The engine is equipped with an
easy pull recoil starter.
Shield Edge Guard - Protects the shield by automatically
cutting the line to the correct length.
WARNING
DEBRIS THROWN FROM THE TRIMMER CAN
RESULT IN FOREIGN OBJECTS BEINGTHROWN
INTO THE EYES, WHICH CAN CAUSE SEVERE
EYE DAMAGE AND INJURY. ALWAYS WEAR
SAFETY GLASSES OR EYE SHIELDS WHEN OP
ERATING THE TRIMMER.
IF YOU WEAR EYE GLASSES, PUT A WIDE VI
SION SAFETY MASK OVER THEM.
Figure 5 : Your new string trimmer
Shield Edge Guard
Trimmer Line
Trimmer Head
Dipstick
Trimmer Head Drive Lever
Handle Adjustment Knob
Fuel Cap
Recoil Starter Handle
Throttle Control Lever
Upper Handle
Control Bail

Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
10
Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
CAUTION
IMPROPER TREATMENT OF THE STRING TRIM
MER CAN DAMAGE IT AND SHORTEN ITS
LIFE.
• DO NOT ATTEMPT TO CRANK OR START THE
ENGINE BEFORE IT HAS BEEN PROPERLY
SERVICED WITH THE RECOMMENDED OIL.
THIS MAY RESULT IN AN ENGINE FAILURE.
OPERATION
How to Stop the Trimmer Head
Release the control bail. It will return to its open position
and disengage the trimmer head.
WARNING
THE TRIMMER HEAD WILL CONTINUE TO RO
TATE FOR SEVERAL SECONDS AFTER THE EN
GINE HAS STOPPED
How to Stop the Engine
Move the throttle control lever completely back to the
STOP position.
How to Use the Trimmer Head Drive Lever
1. To engage the trimmer head, hold the control bail
against the handle. Move the trimmer head drive
lever forward to engage the trimmer head. The faster
the engine runs, the faster the trimmer head will
rotate. SEE FIGURE 6.
2. Once the trimmer head is rotating, push the trimmer
forward to trim.
How to Use the Throttle Control
1. During normal use, set the throttle control lever in
the FAST position to run the engine at full speed. SEE
FIGURE 7.
2. Pull the throttle control lever back to decrease engine
speed. Push the throttle control lever forward to
increase engine speed.
3. To stop the engine, pull the throttle control lever
completely back to the stop position.
How to Use the Primer Button (600050B only)
1. Push the primer button five times. Wait approximately
two seconds between each push.
NOTE: Do not use the primer button to restart a
warm engine after a short shutdown.
Figure 6: Using the trimmer head drive lever
Control bail
Handle
Trimmer Head
Drive Lever
Figure 7: Using the throttle control
Throttle Control
Lever

Operator's Manual
Rolling String Trimmer 600050V, 600050B
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11
How to Start the Engine
NOTE: DO NOT BE ALARMED, your engine will
smoke the first time it is started. It is burning
off the protective coating that is on the internal
engine parts.
1. Before each use, remove debris from the debris screen
shown in NO TAG. Debris can cause the engine to
overheat. Wipe the debris screen with a cloth or paper
towel.
2. Move the throttle control lever forward to the START
or FAST position.
3. FOR 600050B: To start a cold engine, push the
primer button five times. Wait two seconds between
each push of the primer button.
NOTE: Do not use the primer to start a warm
engine.
4. Firmly hold the recoil starter handle with your right
hand. SEE FIGURE 8.
WARNING
NEVER LEAVE THE TRIMMER UNATTENDED
WHILE THE ENGINE IS RUNNING. WAIT FOR
THE TRIMMER LINES TO STOP ROTATING.
WARNING
NEVER RUN THE ENGINE INDOORS OR IN
A POORLY VENTILATED AREA. ENGINE EX
HAUST CONTAINS CARBON MONOXIDE, AN
ODORLESS AND DEADLY GAS. KEEP HANDS,
FEET, HAIR AND LOOSE CLOTHING AWAY
FROM THE TRIMMER AND ANY MOVING
PARTS ON THE ENGINE. AVOID TOUCHING
THE MUFFLER AND SURROUNDING AREAS.
TEMPERATURES MAY EXCEED 150 DEGREES
Trimmer Tips
• Set the throttle control in the FAST position. If the
weeds or grass are tall and thick, operate the trimmer
at a slower walking speed.
• Frequently clean the underside of the trimmer to
remove any grass build up. See the Maintenance
section for details.
• For best results and longer lasting line, use the ends
of the line to do the cutting. This is easily done by
moving slowly through very thick or heavy weeds.
• If the trimmer lines become too short, it will take
longer to complete the job. If the trimmer lines are
worn to less than half their original length, change to
a new trimmer line. “See How To Change The Trimmer
Line” in the Service And Adjustment section.
• Do not trim on excessively steep slopes. If a slope
is difficult to stand on, do not trim. Do not trim on
slopes when the ground is slippery or wet. Trim across
the face of a slope, not up and down.
• Trimmer head contact to concrete, asphalt and harder
services may create premature wear to the height
guide.
WARNING
DEBRIS SUCH AS STICKS, GRAVEL OR ROCKS
CAN BE THROWN WITH SUFFICIENT FORCE
TO CAUSE PERSONAL INJURY OR PROPERTY
DAMAGE.
5. Pull back sharply on the recoil starter handle. DO
NOT allow the starter rope to snap back. Let the
starter rope slowly rewind as you hold the recoil
starter handle.
TIP: On 600050B
models, if the
engine fails to
start after three
pulls, push the
primer button
two times and
pull the recoil
starter handle
Figure 8: Using the recoil starter handle to start the engine.
Recoil starter
handle
Primer
Button
Figure 9: Primer Button

Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
12
Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
Service Records Before Each Use Every 25 Hours As Noted Service Date
Check engine oil level X
Check trimmer lines X 1
Check trimmer head
engagement
X
Engine/machine cleaning X 2
Check nuts and bolts X
Check spark plug X
Change engine oil* X
Service Air Filter* X 3
Lubricate jackshaft
Assembly
X
Lubricate wheel bearings X
Good maintenance is essential for safe, economical and trouble-free operation. It will also help reduce air
pollution.
MAINTENANCE
Note 1 -When old line is half the original length, replace with new line.
Note 2 - Clean daily if used in extremely dusty or dirty conditions.
Note 3 - Change more often if used in extremely dusty or dirty conditions.
* To service the air filter and change the oil in the 600050V model, you must remove the wheels on the string
trimmer.
General Recommendations
The warranty on this trimmer does not cover items that
have been subjected to operator abuse or negligence.
To receive full value from the warranty, the operator
must maintain the trimmer as instructed in this manual.
Some adjustments must be made periodically to
properly maintain your trimmer. All adjustments in the
Service and Adjustments section of this manual must be
checked at least once each season.
Product Specications
Trimmer Line Diameter: 0.155 inches
Trimmer Line Length: 21.5 inches
Torque: 5.5 ft. lbs.

Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
13
How to Lubricate the Jackshaft Assembly
A grease fitting is provided to lubricate the jackshaft
assembly. Use a grease gun with automotive type
grease to lubricate the jackshaft assembly AS SHOWN
IN FIGURE 9.
How to Change Engine Oil
Change the engine oil when the engine is warm. For
the proper oil capacity, see the engine manufacturer's
instructions. SEE FIGURES 10 and 11.
NOTE: In order to change the oil in the 600050V
string trimmer model, you must remove the wheel.
1. Disconnect spark plug wire from the spark plug.
2. Remove the oil drain plug as shown in Figure 10.
3. Drain all the engine oil into a flat pan.
4. Install the oil drain plug. Make sure the oil drain plug
is tight.
5. Remove the dipstick.
6. Fill the engine crankcase. DO NOT OVERFILL. For
proper oil capacity, see the engine manufacturer’s
Figure 11: Oil drainplug on 600050B
Figure 9: Trimmer as positioned during shipment.
Grease Fitting
Figure 10: Oil drainplug on 600050V
Oil Drain Plug
Oil Drain Plug

Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
14
Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
SERVICE AND ADJUSTMENT
How to Replace the Trimmer Line
For the best performance, use a heavy gauge (0.155”
diameter) trimmer line. Cut the length of the trimmer
line to 21.5 inches. Use the length guide, located on
the shield, to make sure the trimmer line is the correct
length.
Do not allow the length of the lines to vary more than
one inch. This is important to make sure the trimmer
head is balanced and does not vibrate.
IMPORTANT: To extend the life of the trimmer line,
keep the trimmer line moist. If not kept moist, the
nylon trimmer line will become dry and brittle.
Keep extra trimmer line in a can of water. The
line will then stay flexible and easy to change. A
flexible line will also last much longer.
WARNING
BEFORE YOU INSPECT, CLEAN OR SERVICE
THETRIMMER, STOPTHE ENGINE. MAKE SURE
THAT ALL MOVING PARTS HAVE STOPPED.
DISCONNECT THE WIRE FROM THE SPARK
PLUG.
How To Change Trimmer Lines
When the trimmer line becomes worn to half of the
original length, replace the trimmer line as follows;
1. Stop the engine. Wait for all moving parts to stop.
2. Remove the worn trimmer line from the line retainer.
3. First, thread the ends of the new trimmer line
through the outside loops. SEE FIGURE 12.
4. Next, take the ends of the line, cross over the line
retainer, and thread the ends through the center
hold. SEE FIGURE 13.
5. Then, check to make sure that the ends of the line
are event. SEE FIGURE 14.
Figure 14: Check ends of line
Figure 13: Threading trimmer line
through center hold.
Line
Retainer
Figure 12: Threading the new trimmer
line.
Line
Retainer Trimmer
Line

Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
15
How to Adjust the Height of the Handle
Use the knobs on each side of the handle to adjust the
height of the handle. SEE FIGURE 15.
1. Hold the handle with one hand and loosen both
knobs until the ratchet teeth are disengaged. Do not
remove the knobs.
2. Move the handle up or down to the desired position,
then align the ratchet teeth. Make sure both sides of
the handle are level.
3. Tighten the knobs.
How to Set the Height of the Cut
The height of the cut can be set from 1-1/2
inches to three inches. The recommended
cutting height for the average yard is 2 inches.
SEE FIGURE 16.
1. Use the T-wrench found in the parts bag to
loosen the set screw shown in the figure
below.
2. Set the trimmer head at the desired height.
Handle
Knob
Ratchet
teeth
Figure 15: Adjusting the height of the handle.
Figure 16: Setting the height of your cut.
Height of Cut
Positions
Height
Guide T-Wrench
Trimmer Head
Set Screw
WARNING
BEFORE YOU SET THE HEIGHT OF THE CUT,
STOP THE ENGINE. WAIT FOR ALL MOVING
PARTS TO STOP. ALLOW THE ENGINE TO COOL
AND DISCONNECT THE SPARK PLUG WIRE.

Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
16
Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
How to Replace the Drive Belt
To replace the drive belt, the trimmer head and shield
must be removed as explained below. SEE FIGURES
17 and 18.
1. Remove the two fasteners that hold the rear of the
shield to the trimmer housing.
2. Remove the four fasteners that hold the front of the
shield and trimmer head to the trimmer housing.
3. Remove the“V”pulley from the idler bracket. 4. Raise
the front of the trimmer housing and remove the
drive belt.
* On some models, it is necessary to loosen the
mounting bolt for the drive pulley to remove the drive
belt . Do not bend the belt guides.
NOTE: Make sure you replace the drive belt only
with a replacement belt from the factory.
5. To assemble the drive belt, reverse the above steps.
Make sure all fasteners are tight. Make sure the
mounting bolt for the drive pulley is tight.
6. Check the routing of the drive belt. Make sure the
drive belt is inside of all belt guides as shown..
IMPORTANT: Test the drive system. Start the
engine and move the throttle control to the FAST
position. Engage and disengage the trimmer
head several times. When disengaged, make sure
the trimmer head completely stops when resting
on the ground. If the trimmer head continues to
rotate, take the trimmer to an authorized service
center.
WARNING
BEFORE YOU REMOVE THE DRIVE BELT, DIS
CONNECT THE WIRE FROM THE SPARK PLUG.
Figure 17: Trimmer housing
Figure 18: Routing the drive belt
Drive Belt
Shield
Trimmer Head
Belt Guide
Drive Belt
Drive Pulley
Mounting Bolt
Belt Guide
Belt Guide
"V" Pulley

Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
17
STORAGE
When the trimmer is put in storage for thirty days or
more, follow the steps below to make sure the trimmer
is in good condition the following season.
Trimmer:
Completely clean the trimmer
Put the trimmer in a building that has good ventilation.
NOTE: A yearly check-up or tune-up at an autho-
rized service dealer will ensure that the trimmer
will provide maximum performance for the next
season.
Engine:
IMPORTANT: It is important to prevent gum
deposits from forming in fuel system parts such
as the carburetor, fuel filter, fuel hose, and tank
during storage. Also, using alcohol blended fuels
(called gasohol, ethanol or methanol) can attract
moisture which leads to separation and formation
of acids during storage. Acidic gas can damage
the fuel system of an engine while in storage.
1. Drain all gasoline from the fuel tank. Let the engine
run until it is out of gasoline. If you do not want to
remove gasoline, add a fuel stabilizer to any gasoline
left in the tank. A fuel stabilizer will minimize the
formation of gum deposits and acids. If the tank is al-
most empty, mix the fuel stabilizer with fresh gasoline
in a separate container and add the mixture to the
tank. Always follow the instructions on the stabilizer
container. Run the engine at least ten minutes after
stabilizer is added to allow the mixture to reach the
carburetor.
2. Drain the oil from a warm engine. Fill the engine
crankcase with new oil.
3. Remove the spark plug from the cylinder. Pour one
ounce of oil into the cylinder. Slowly pull the recoil
starter handle so that the oil will protect the cylinder.
Install a new spark plug in the cylinder.
4. Completely clean the trimmer including dirt and
debris from the cylinder cooling fins and the engine
housing.
5. When not in use, disconnect spark plug lead and store
in a well ventilated area inaccessible to children.
WARNING
DO NOT REMOVE GASOLINE WHILE INSIDE
A BUILDING, NEAR A FIRE, OR WHILE YOU
SMOKE. GASOLINE FUMES CAN CAUSE AN
EXPLOSION OR A FIRE.
TROUBLESHOOTING & REPAIR
At Ardisam, we build quality and durability into the
design of our products; but no amount of careful design
by us, and careful maintenance by you, can guarantee
a repair-free life for your Earthquake String Trimmer.
Most repairs will be minor, and easily xed by follow-
ing the suggestions in the troubleshooting guide in
this section.
The guide will help you pinpoint the causes of common
problems and identify remedies.
For more complicated repairs, you may want to rely on
your retailer, an authorized service center or Ardisam,
Inc. A parts catalog is included in this section.
We will always be glad to answer any questions you
have, or help you nd suitable assistance.To order parts
or inquire about warranty, call or write us at the address
found below, under the section ordering replacement
parts.
ORDERING REPLACEMENT PARTS
Parts can be obtained from the store where the string
trimmer was purchased or direct from the factory. To
order from the factory- call, write or e-mail to:
Ardisam, Inc.
1160 Eighth Avenue,
Cumberland, Wisconsin 54829
1-800-345-6007 • 1-715-822-2415
E-mail: [email protected]om
Please include the following information with your
order:
1) Part numbers
2) Part description
3) Quantity
4) Model number and serial number

Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
18
Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
TROUBLESHOOTING GUIDE
NOTE: Please see the engine manual for a full troubleshooting guide for any engine issues.
Trouble Cause Correction
Engine does not start Spark plug wire disconnected Connect spark plug wire
Engine not primed Prime engine
Defective or incorrectly gapped
spark plug
Inspect or replace spark plug
Fuel tank empty Add fuel
Dirty carburetor or fuel line Clean carburetor or fuel line
Dirty air filter Replace air filter
Carburetor out of adjustment For carburetor adjustment, take the
unit to an authorized service center
Engine flooded Wait several minutes before
starting
Throttle control lever in incorrect
position
Move throttle lever to FAST or
START position
Stale gasoline Drain old gasoline and add fresh
gas
Defective throttle control lever or
wire
Inspect lever and wire. Replace if
damaged or defective.
Engine runs poorly Bad spark plug Replace spark plug
Dirty air filter Replace air filter
Carburetor out of adjustment For carburetor adjustment, take the
unit to an authorized service center
Stale gasoline Drain old gasoline and add fresh
gas
Engine cooling system clogged Clean engine screen and cooling
fins

Operator's Manual
Rolling String Trimmer 600050V, 600050B
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19
Trouble Cause Correction
Engine overheats Engine cooling system clogged Clean debris screen and engine
cooling fins
Carburetor out of adjustment For carburetor adjustment, take the
unit to an authorized service center
Oil level is low Add oil
Engine will not stop running Defective throttle control lever or wire Inspect and replace damaged parts
Throttle not adjusted properly Move throttle to the full OFF position
Poor trimming performance Trimmer line length is too short Correct line length is 21.5 inches.
When the line is less than 1/2 of this
length, replace the line.
Engine not set at FAST speed Move engine throttle lever to FAST
position
Trimmer vibrates Set screw for the trimmer head is
loose
Tighten set screw with T-handle
wrench
Trimmer line lengths are substan-
tially different
Adjust trimmer line to approximately
equal lengths
Loose nuts or bolts Check all bolts and nuts, including
engine bolts
Broken trimmer head Replace broken part
Trimmer head does not retain line Trimmer line not properly attached Follow instructions on decal or in the
Service section of the owner's manual
Broken line retainer Replace trimmer head assembly
Trimmer line not correct size Use a 0.155 diameter trimmer line
NOTE: Please see the engine manual for a full troubleshooting guide for any engine issues.

Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
20
Operator's Manual
Rolling String Trimmer 600050V, 600050B
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5
Use this guide and do not trim on a slope greater than 15 degrees.
A 10 degree slope is a hill that increases in height at approximately 1.76 feet in 10 feet.
A 15 degree slope is a hill that increases in height at approximately 2.68 feet in 10 feet.
WARNING
USE EXTREME CARE AT ALL TIMES AND AVOID
SUDDEN TURNS OR MANEUVERS. FOLLOW
OTHER INSTRUCTIONS IN THIS MANUAL FOR
SAFETY IN TRIMMING ON SLOPES. OPERATE
A TRIMMER ACROSS THE FACE OF SLOPES,
NEVER UP OR DOWN SLOPES. USE EXTRA
CARE WHEN OPERATING ON OR NEAR SLOPES
AND OBSTRUCTIONS.