INSTRUCTION MANUAL
Have product questions or need technical support? Please feel free to contact us!
31cc 4 Stroke Gas Brush Cutter
Model # PS431
Website: www.Amerisuninc.com
www.powersmartusa.com
Toll free: 1-800-791-9458 Mon-Fri 9-5 EST
Email: support@amerisuninc.com
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CONTENTS
Technical data…...………………………………………………………... 3
Introduction………………………………………………………………. 4
Safety information…….………………………………………………... 4
General safety procedures ……....……………………………………… 5
Knowing your brush cutter……………………………………………… 9
Brush cutter preparation…………………………………….…………... 10
Operation……………………....………………………………………… 13
Maintenance……………………………………………………………... 15
Storage……………………………………………………………………. 15
Troubleshooting…………………………………………………………. 16
Exploded view & parts list……………………………………………… 17
Warranty………………………………………………………………… 21
TECHNICAL DATA
31cc 4 Stroke Gas Brush Cutter Model # PS431
Engine type: 4 stroke, single cylinder
Displacement: 31 cc
Fuel tank capacity: 20.3 fl.oz
Oil capacity: 2.7 fl.oz
Blade size: 10 inch, 20 mm arbor
Overall length: 74.8 inch
Package dimensions (L x W x H): 42.5 x 10 x 11.4 inches
Shipping weight: 19.6 lb.
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INTRODUCTION
Thank You for Purchasing a PowerSmart® Product. This manual provides information regarding the sa fe
operation and maintenance of this product. Every effort has been made to ensure the accuracy of the
information in this manual. PowerSmart® reserves the right to change this product and specifications at
any time without prior notice.
Please keep this manual available to all users during the entire life of the product.
This manual contains special messages to bring attention to potential safety concerns, product
damage as well as helpful operating and servicing information. Please read all the
information carefully to avoid injury and machine damage.
QUESTIONS? PROBLEMS?
Please contact our Customer Service Dept. with any questions and/or comments, either by Email:
support@amerisuninc.com, or Toll Free at (800) 791-9458. We are available Mon-Fri 9am-5pm EST to
help solve any issues that you might encounter.
NOTICE REGARDING EMISSIONS
Engines that are certified to comply with U.S. EPA emission regulations for SORE (Small Off Road
Equipment), are certified to operate on regular unleaded gasoline, and may include the following
emission control systems: (EM) Engine Modif ications and (TWC) Three -Way Catalyst (if so equipped).
SAFETY INFORMATION
Before operating this product, read and observe all warnings, cautions, and instructions on the product
and in this Owner’s Manual.
NOTE: The following safety information is not meant to cover all possible conditions and situations that
may occur. Read the entire Owner’s Manual for safety and operating instructions. Failure to follow
instructions and safety information could result in serious injury or death.
This safety alert symbol is used to identify safety information about hazards that can result in personal
injury.
A signal word (DANGER, WARNING, or CAUTION) is used with the alert symbol to
indicate the likelihood and the potential severity of injury. In addition, a hazard symbol may
be used to represent the type of hazard.
DANGER indicates a hazard, which, if not avoided, will result in death or serious injury.
WARNING indicates a hazard, which, if not avoided, could result in death or serious injury.
CAUTION indicates a hazard, which, if not avoided, might result in minor or moderate injury.
CAUTION when used without the alert symbol, indicates a situation that could result in damage to the
engine.
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GENERAL SAFETY PROCEDURES
For any questions regarding the hazard and safety notices listed in this manual or on the product, please
call (800) 791-9458 Mon-Fri 9-5 EST before using the engine.
Read all instructions before operating
Warning: When using the unit, all safety rules must be followed. Please read these instructions before
operating the unit in order to ensure the safety of the operator and any bystanders. Please keep these
instructions for later use.
Warning: This unit can cause serious injury including amputation or blindness to the operator and
others. The warnings and safety instructions in this manual must be followed to provide reasonable safety
and efficiency in using the unit. The operator is responsible for following the warnings and instructions in
this manual and on the unit. Read the entire instruction manual before assembling and using the unit!
Restrict the use of this unit to persons who read, understand, and follow the warnings and instructions in
this manual and on the unit. Never allow children to operate this unit.
OPERATOR SAFETY
• Dress properly. Always wear safety glasses or similar eye protection when operating, or performing
maintenance on your unit (safety glasses are available). Eye protection should be marked Z87.
• Always wear hearing protection.
• Always wear face or dust mask if operation is dusty.
• Always wear heavy, long pants, long sleeves, boots, and gloves. Wearing safety leg guards is
recommended.
• Always wear foot protection. Do not go barefoot or wear sandals.
• Secure hair above shoulder length. Secure or remove loose clothing and jewelry or clothing with
loosely hanging ties, straps, tassels, etc. They can be caught in moving parts.
• Being fully covered also helps protect you from debris and pieces of toxic plants thrown by spinning
line/blade.
• Stay alert. Do not operate unit when you are tired, ill, upset or under influence of alcohol, drugs, or
medication. Watch what you are doing; use common sense.
• Never start or run the engine inside a closed room or building. Breathing exhaust fumes can kill.
• Keep handles free of oil and fuel.
• Always use the handlebar and a properly adjusted shoulder strap with a blade (see ASSEMBLY).
DANGER: CARBON MONOXIDE
Using an engine indoors CAN KILL YOU IN MINUTES. Engine exhaust contains carbon
monoxide (CO). This is a poison gas you cannot see or smell. I f you can smell the engine exhaust, you are
breathing CO. But even if you cannot smell the exhaust, you could be breathing CO.
NEVER use an engine inside homes, garages, crawlspaces, or other partly enclosed areas. Deadly levels
of carbon monoxide can build up in these areas. Using a fan, or opening windows and/or doors will NOT
properly vent CO nor supply adequate fresh air. ONLY use an engine outside and far away from
windows, doors, and vents. These openings can pull in engine exhaust.
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Even if you use an engine correctly, CO may leak into the home. ALWAYS use a battery-powered or
battery-backup CO alarm in the home. If you start to feel sick, dizzy, or weak after the engine has been
running, move to fresh air RIGHT AWAY. See a doctor. You may have carbon monoxide poisoning.
WARNING: The exhaust from this product contains chemicals known to th e State of California to cause
cancer, birth defects, or other reproductive harm.
WARNING: This engine may emit highly flammable and explosive gasoline vapors, which can cause
severe burns or even death if ignited. A nearby open flame can lead to explosion even if it isn’t directly in
contact with gasoline.
• Do not operate near an open flame.
• Do not smoke near the engine.
• Always operate on a firm, level surface.
• Always turn engine off b efore refu eli ng. All ow engine to cool for at least 2 minutes before
removing fuel cap. Loosen cap slowly to relieve pressure in tank.
• Do not overfill fuel tank. Gasoline may expand during operation. Do not fill to the top of the tank.
Allow for expansion.
• Always check for spilled fuel before operating.
• Empty fuel tank before storing or transporting the engine.
WARNING: This engine produces heat when running. Temperatures near exhaust can exceed 1500F
(650 C).
Do not touch hot surfaces. Pay attention to warning labels on the engine identifying hot parts of the
machine.
Allow engine to cool down after use before touching engine or areas of the engine that become hot during
use.
CAUTION: Misuse of this engine can damage it or shorten its life.
Only use engine for its intended purposes.
UNIT/MAINTENANCE SAFETY
WARNING: Stop unit and disconnect the spark plug before performing maintenance (except idle speed
adjustments).
• Look for and replace damaged or loose parts before each use. Look for and repair fuel leaks before
use. Keep unit in good working condition.
• Throw away blades that are bent, warped, cracked, broken, or damaged in any other way. Replace
trimmer head parts that are cracked, chipped, broken, or damaged in any other way before using the
unit.
• Maintain unit according to recommended procedures. Keep blade sharp. Keep cutting line at the
proper length.
• Use only specified replacement line. Never use wire, rope, string, etc.
• Install required shield properly before using the unit.
• Use only specified blade or trimmer head; make sure it is properly installed and securely fastened.
• Never start engine with clutch shroud removed. The clutch can fly off and cause serious injury.
• Be sure blade or trimmer head stops turning when engine idles.
• Make idle speed adjustments with the lower end supported to prevent blade or trimmer line from
contacting any object. Hold unit by hand; do not use the shoulder strap for support.
• Keep others away when making idle speed adjustments.
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• Use only recommended accessories and replacement parts.
• Have all maintenance and service not explained in this manual performed by your authorized service
dealer.
CUTTING SAFETY
WARNING: Inspect area before starting unit. Remove all debris and hard objects such as rocks, glass,
wire, etc., that can ricochet, be thrown, or otherwise cause injury or damage during operation.
• Keep others including children, animals, bystanders, and helpers at least 50 feet (15meters) away.
Bystanders should be encouraged to wear safety glasses. Stop engine immediately if you are
approached.
• Always keep engine on the right--hand side of your body.
• Hold the unit firmly with both hands.
• Keep firm footing and balance. Do not overreach.
• Keep blade or trimmer head below waist level. Do not raise engine above your waist.
• Keep all parts of your body away from blade, trimmer head, and muffler when engine is running. A
hot muffler can cause serious burns.
• Cut from your left to your right. Cutting on right side of the shield will throw debris away from the
operator.
• Use only in daylight or good artificial light.
• Use only for jobs explained in this manual.
TRANSPORTING AND STORAGE
• Stop the unit before carrying.
• Keep muffler away from your body.
• Allow the engine to cool and secure the unit before storing or transporting it in a vehicle.
• Empty the fuel tank before storing or transporting the unit. Run out of fuel left in the carburetor by
starting the engine and letting it run until it stops.
• Store unit and fuel in area where fuel vapors cannot reach sparks or open flames from water heaters,
electric motors or switches, furnaces, etc.
• Store unit so the blade or line limiter blade cannot accidentally cause injury. The unit can be hung by
the shaft.
• Store unit out of reach of children.
SAFETY NOTICE: Exposure to vibrations through prolonged use of gasoline powered hand tools could
cause blood vessel or nerve damage in the fingers, hands, and joints of people prone to circulation
disorders or abnormal swellings. Prolonged use in cold weather has been linked to blood vessel damage
in otherwise healthy people. If symptoms occur such as numbness, pain, loss of strength, change in skin
color or texture, or loss of feeling in the fingers, hands, or joints, discontinue the use of this tool and seek
medical attention. An anti-vibration system does not guarantee the avoidance of these problems. Users
who operate power tools on a continual and regular basis must monitor closely their physical condition
and the condition of this tool.
Children
Sever injury can occur if the operator is not alert to the presence of children in the immediate area.
Children are often attracted to the mowing activity. Never assume that children will remain where you
last saw them.
1. Keep children out of the mowing area and under the watchful care of a responsible adult other than
the operator.
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2. Be alert and turn mower off if a child enters the area.
3. Never allow children under the age of 16 to operate the product.
4. Use extra care when approaching blind corners, shrubs, trees, or other objects that may block your
view of a child.
Fuel safety
1. Safe Handling of Gasoline
2. To avoid personal injury or property damage, use extreme care in handling gasoline. Gasoline is
extremely flammable and the vapors are explosive.
3. Extinguish all cigarettes, cigars, pipes, and other sources of ignition.
4. Only use a US EPA approved compliant portable fuel container.
5. Never remove gas cap or add fuel with the engine running. Allow engine to cool before refueling.
6. Never attempt to refuel the product while indoors.
7. Never store the machine or fuel container where there is an open flame, spark, or pilot light such as on
a water heater or on other appliances.
8. Never fill containers inside a vehicle or on a truck or trailer bed with a plastic liner. Always place
containers on the ground away from your vehicle before filling.
9. Remove gas-powered equipment from the truck or trailer and refuel it on the ground. If this is not
possible, then refuel such equipment with a portable container, rather than from a gasoline dispenser
nozzle.
10. Keep the nozzle in contact with the rim of the fuel tank or container opening at all times until fueling
is complete. Do not use a nozzle lock-open device.
11. If fuel is spilled on clothing, change clothing immediately.
12. Never overfill fuel tank. Replace gas cap and tighten securely.
BRUSHCUTTER SAFETY
Blade can thrust violently away from material it does not cut. Blade thrust can cause amputation
of arms or legs.
Do not use trimmer head as a fastening device for the blade.
The blade continues to spin after the trigger is released or engine is turned off. The coasting
blade can throw objects or seriously cut you if accidentally touched. Stop the blade by contacting the
right-hand side of the coasting blade with material already cut.
WARNING: Inspect area before starting unit. Remove all debris and hard objects such as rocks, glass,
wire, etc., that can ricochet, be thrown, or otherwise cause injury or damage during operation.
• Throw away and replace blades that are bent, warped, cracked, broken or damaged in any other way.
• Install required shield properly before using the unit.
• Use only specified blade and make sure it is properly installed and securely fastened.
• Cut from y our left to your right. Cutting on the rig ht side of the shield will throw debris away from the
operator.
• Always use the handlebar and a properly adjusted shoulder strap with blade (see ASSEMBLY).
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1 Recoil Starter handle
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Shoulder strap
2 Spark plug
10 Throttle trigger
3 ON/OFF switch
11 Oil dipstick
4 Handlebar
12 Fuel tank
5 Coupler
13 Choke lever
6 Shaft
14 Primer bulb
7 Blade
8 Shield
1
2
3 4 5
6
10
9 8 7
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12
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KNOWING YOU R BRUSH CUTTER
Please use the illustration below to familiarize yourself with the location and function of the components
that control of your brush cutter.
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BRUSH CUTTER PREPARATION
Locking lever
The following section describes steps necessary to prepare the brush cutter for use. If after reading this
section, you are unsure about how to perform any of the steps please call (800) 791-9458 Mon-Fri 9-5
EST for customer service. Failure to perform these steps properly can damage the brush cutter or shorten
its lifespan.
INSTALLING BRUSH CUTTER ATTACHMENT
CAUTION: When installing brush cutter attachment, place the unit on a
flat surface for stability.
1. Loosen the coupler by turning the knob counterclockwise and lift the
locking lever.
2. Make sure the small hole on the attachment to match the slot on the
powerhead.
3. Push the attachment into the coupler.
6. Before using the unit, push down locking lever and tighten the knob
securely by turning clockwise.
WARNING: Make sure the locking/ release button is locked in the primary
hole and the knob is securely tightened before operating the unit. All
attachments are designed to be used in the primary hole unless otherwise
stated in the applicable attachment instruction manual. Using the wrong hole
could lead to serious injury or damage to the unit.
ATTACHING THE PLASTIC SHIELD
CAUTION: The shield must be properly installed. The shield provides
partial protection to the operator and others from the risk of thrown objects.
1. Attach the shield and bracket to the pipe of attachment.
2. Install hex screw using wrench and tighten securely.
ASSEMBLY OF SHOULDER STRAP
WARNING: Proper shoulder strap and handlebar adjustments must be made with the engine completely
stopped before using unit.
1. Insert your right arm and head through the shoulder strap and allow it to rest on your left shoulder.
Make sure the hook is to the right side of your waist.
NOTE: A one-half twist is built in the shoulder strap to allow the strap to rest flat on the shoulder.
2. Adjust the strap, allowing the hook to be about 6 inches (15 cm) below the waist.
3. Fasten the strap hook to the clamp located between the throttle trigger and the handlebar mounting
bracket and lift the tool to the operating position.
4. Try on shoulder strap and adjust for fit and balance before starting the engine or beginning a cutting
operation.
NOTE: It may be necessary to relocate the shoulder strap clamp on the shaft for proper balancing of unit.
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REPLACE THE BLADE
Oil dipstick
WARNING: Wear protective gloves when handling or performing maintenance on the blade to avoid
injury. The blade is sharp and can cut you even when it is not moving.
WARNING: Do not use any blades, or fastening hardware other than the washers and nuts shown in the
following illustrations. These parts must be provided by the manufacturer and installed as shown below.
Failure to use proper parts can cause the blade to fly off and seriously hurt you or others.
1. Remove the retaining washer from the threaded shaft of the gearbox. Leave the dust cup on the shaft.
2. Install the blade and the retaining washer over the threaded shaft.
3. Make sure the raised part of the retaining washer is facing the gearbox and the
raised area fits into the hole in the center of the blade.
4. Slide the blade and retaining washer onto the shaft of the gearbox.
5. Place the cupped washer onto the shaft. Make sure the cupped side of the washer
is toward the blade.
6. Install the blade nut by threading onto the shaft counterclock wis e (looking from
bottom of unit).
ADD OIL
The product is shipped without oil. User must add the proper amount of oil before operating the product
for the first time. The oil capacity of the engine crankcase is 2.7 fl. oz. For general use (above 40° F), we
recommend 30W, 4-stroke engine oil.
ENGINE OIL RECOMMENDATIONS
Select good quality detergent oil bearing the American Petroleum Institute (API) service classifications
SJ, SL, or SM (synthetic oils may be used). Use the ASE viscosity grade of oil from the following chart
that matches the starting temperature anticipated before the next oil changes.
Engine Oil Temperature R ecom men dat io ns
To add oil, follow these steps:
1. Make sure the product is on a level surface. Tilting the product to assist in filling
will cause oil to flow into engine areas and will cause damage.
2. Remove the dipstick from the engine.
3. Add oil slowly. Do not overfill.
4. To check the oil level, wipe the dipstick with a clean rag. Insert the dipstick into
the oil fill opening without screwing it in. Remove the d ipstick to check the oil
mark.
5. Slowly add more oil and repeat step 4 until the oil mark reaches to the top of
the dipstick. Do not overfill the crankcase.
6. Check for oil leaks. Tighten dipstick firmly.
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ADD GASOLINE
Fuel tank cap
WARNING: This product may emit highly flammable and explosive gasoline vapors, which
can cause severe burns or even death if ignited. A nearby open flame can lead to explosion
even if not directly in contact with gasoline.
Use fresh (within 30 days from purchase), lead-free gasoline with a minimum of 87 octane rating. Do not
mix oil with gasoline.
To add gasoline, follow these steps:
1. Make sure the product is on a level surface.
2. Unscrew fuel cap and set aside. NOTE: The fuel cap may be tight and hard to
unscrew.
3. Slowly add unleaded gasoline to the fuel tank. Be careful not to overfill. The
capacity of the fuel tank is 20.3 fl.oz. NOTE: Do not fill the fuel tank to the very
top. Gasoline will expand and spill over during use even with the fuel cap in
place.
4. Reinstall fuel cap and wipe clean any spilled gasoline with a dry cloth.
IMPORTANT:
• Never use an oil/gasoline mixture.
• Never use old gasoline.
• Avoid getting dirt or water into the fuel tank.
• Gasoline can age in the tank and make starting difficult. Never store brush cutter for extended
periods of time with fuel in the tank or the carburetor.
• Turn the fuel cock off and drain the fuel from the carburetor.
NOTE: After completing the above preparation, the brush cutter is ready to be started.
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OPERATION
Primer bulb
Recoil starter handle
WARNING: Be sure to read the fuel information in the safety rules before you begin. If you
do not understand the safety rules, do not attempt to fuel your unit. Call customer support.
STARTING A COLD ENGINE
1. Set unit on a flat surface.
2. Slowly press the primer bulb 3 times.
3. Move choke lever to the START position.
4. Pull recoil starter handle sharply 5 times.
5. Squeeze and hold trigger.
6. Pull recoil starter handle until engine starts.
STARTING A WARM ENGINE
1. Squeeze and hold trigger.
2. Pull recoil starter handle until engine starts.
OPERATING
When operating unit, clip shoulder strap onto clamp, check for the following:
• Wear hearing protection, eye protection, head protection and heavy clothing.
• Extend your left arm and hold handlebar grip with your left hand.
• Hold throttle grip with your right hand with finger on throttle trigger.
• Keep unit below waist level.
• Keep shoulder strap pad centered on your left shoulder and danger sign centered on your back.
• Maintain full weight of tool on your left shoulder.
• Without bending over, keep the blade or trimmer head near and parallel to the ground and not
crowded into material being cut.
Operating instruction
Blade Thrust is a reaction that only occurs when using a bladed unit. This reaction can cause serious
injury such as amputation. Carefully study this section. It is important that you understand what causes
blade thrust, how you can reduce the chance of its occurring, and how you can remain in control of unit if
blade thrust occurs.
WHAT CAUSES BLADE THRUST – Blade Thrust can occur when the spinning blade contacts an
object that it does not cut. This contact causes the blade to stop for aninstant and then suddenly move or
“thrust” away from the object that was hit. The “thrusting” reaction can be violent enough to cause the
operator to be propelled in any direction and lose control of the unit. The uncontrolled unit can cause
serious injury if the blade contacts the operator or others.
WHEN BLADE THRUST OCCURS - Blade Thrust can occur without warning if the blade snags,
stalls, or binds. This is more likely to occur in areas where it is difficult to see the material being cut. By
using the unit properly, the occurrence of blade thrust will be reduced and the operator will be less likely
to lose control.
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• Cut only grass, weeds, and woody brush up to 1/2 inch (1 cm) in diameter with the blade. Do not let
the blade contact material it cannot cut such as stumps, rocks, fences, metal, etc., or clusters of hard,
woody brush having a diameter greater than 1/2 inch (1 cm).
• Keep the blade sharp. A dull blade is more likely to snag and thrust.
• Cut only at full throttle. The blad e will have maximum cutting power and is less like ly to bind or stall.
• “Feed” the blade deliberately and not too rapidly. The blade can thrust away if it is fed too rapidly.
• Cut only from your left to your right. Cutting on right side of the shield will throw debris away from
the operator.
• Use the shoulder strap and keep a firm grip on the unit with both hands. A properly adjusted shoulder
strap will support the weight of the unit, freeing your arms and hands to control and guide the cutting
motion.
• Keep feet comfortably spread apart and braced for a possible sudden, rapid thrust of unit. Do not
overreach. Keep firm footing and balance.
• Keep blade below waist level; it will be easier to maintain control of unit.
• Do not raise the engine above your waist as the blade can come dangerously close to your body.
• Do not swing unit with such force that you are in danger of losing your balance.
Bring the engine to cutting speed before entering the material to be cut. If the blade does not turn when
you squeeze the throttle trigger, make sure shaft is fully inserted into the engine.
Always release the throttle trigger and allow engine to return to idle speed when not cutting. The blade
should not turn while the engine is running at idle. If the blade turns at idle, do not use your unit. Refer to
contact customer service.
• Maintain good firm footing while using the unit. Do th is by planting feet firmly in a comfortable apart
position.
• Cut while swinging the upper part of your body from left to right.
• As you move forward to the next area to cut, be sure to maintain your balance and footing.
WARNING: The operator or others must not try to clear away cut material with the engine running or
the blade turning to avoid serious injury. Stop engine and blade before removing materials wrapped
around blade or shaft.
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MAINTENANCE
WARNING: Disconnect the spark plug before performing maintenance.
CHECK FOR DAMAGED OR WORN PARTS
Contact customer service for replacement of damaged or worn parts.
ON/OFF Switch -- Ensure ON/OFF switch functions properly by pushing and releasing the switch.
Make sure engine stops. Wait 5 seconds before attempting to restart unit to allow switch to reset. Restart
engine and continue.
Fuel Tank -- Discontinue use of unit if fuel tank shows signs of damage or leaks.
Debris Shield -- Discontinue use of unit if debris shield is damaged.
CLEAN AIR FILTER
A dirty air filter decreases engine performance and increases fuel consumption and harmful emissions.
Always clean after every 5 hours of operation.
1. Clean the cover and the area around it to keep dirt from falling into the carburetor chamber when the
cover is removed.
2. Press the tabs on the air filter cover to remove the air filter cover and air filter.
NOTE: To avoid creating a fire hazard or producing harmful evaporative emissions, do not clean filter in
gasoline or other flammable solvent.
3. Wash the filter in soap and water.
4. Allow filter to dry.
5. Replace parts.
REPLACE SPARK PLUG
Replace the spark plug each year to ensure the engine starts easier and runs better. Set spark plug gap at
0.025 inch (0.6 mm). Ignition timing is fixed and nonadjustable.
STORAGE
CAUTION: Perform the following steps after each use:
• Allow engine to cool before storing or transporting.
• Store unit and fuel in a well-ventilated area where fuel vapors cannot reach sparks or open flames
from water heaters, electric motors or switches, furnaces, etc.
• Store unit with all guards in place. Position unit so that any sharp object cannot accidentally cause
injury.
• Store unit and fuel well out of the reach of children.
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SEASONAL STORAGE
Problem
Cause
Solution
Engine fails to start
Engine ON/OFF switch is off.
Engage ON/OFF switch.
Spark plug wire disconnected.
Connect spark plug wire.
Fuel tank empty or stale fuel.
Fill tank with clean, fresh gasoline.
Engine not primed.
Press primer bulb.
Faulty spark plug.
Clean, adjust gap, or replace.
Blocked fuel line.
Clean fuel line.
Engine flooded.
Wait a few minutes to restart, do not prime.
Engine runs erratic.
Spark plug wire loose.
Connect and tighten spark plug wire.
Blocked fuel line or stale fuel.
Clean fuel line. Fill tank with clean, fresh
gasoline.
Water or dirt in fuel system.
Drain fuel tank. Refill with fresh fuel.
Dirty air filter
Please refer to engine manual.
Engine overheats.
Engine oil lever low.
Fill crankcase with proper oil.
Air flow restricted.
Clean area around and on top of engine.
Idles poorly.
Spark plug fouled, faulty, or
gap too wide.
Reset gap or replace spark plug.
Dirty air cleaner.
Please refer to engine manual.
Excessive
Blade loose or unbalanced.
Tighten and balance blade.
Bent/damaged blade.
See an authorized service dealer.
Prepare unit for storage at end of season or if it will not be used for 30 days or more.
If your unit is to be stored for a period of time:
1. Clean the entire unit before lengthy storage.
2. Store in a clean dry area.
3. Lightly oil external metal surfaces.
FUEL SYSTEM
Fuel stabilizer is an acceptable alternative in minimizing the formation of fuel gum deposits during
storage. Add stabilizer to the gasoline in the fuel tank or fuel storage container.
Run engine at least 5minutes after adding stabilizer.
ENGINE
1. Replace spark plug with new one of recommended type and heat range.
2. Clean air filter.
3. Check entire unit for loose screws, nuts, and bolts. Replace any damaged, broken, or worn parts.
4. At the beginning of the next season, use only fresh fuel.
TROUBLESHOOTING
vibration/noise
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EXPLODED VIEW AND PARTS LIST
Engine exploded view
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Engine parts list
Item
Stock #
Description
Qty
Item
Stock #
Description
Qty
2
100010417-0001
Screw M5×15
16
49
100003055
Piston
1
3
100002301
Valve Cover
1
50
100003218
Circlip
2
4
100002788
Oil Block
1
51
100003112
Piston Pin
1
6
100010128
Valve Cover Gasket
1
53
100003134
Piston Ring 1st
1 7 100004416
Rocke r Arm Asse mb ly
2
54
100003176
Piston Rin g 2nd
1
9
100030648
Adjust Nut
2
56
100010135
Crankcase Gasket
1
10
100004463
Upper Rocker Arm
2
57
100010668
Bearing 6002
1
12
100004387
Push Rod
2
59
100004096-0001
Dipstick Assembly
1
13
100009371
Spark Plug
1
62
100010419-0001
Screw M5×28
1
14
100004577
Valve Spring Seat
2
63
100017615
Oil Seal 15×26×5
2
15
100004560
Valve Spring
2
64
100010911-0003
Washer 8
1
16
100002362
Cylinder Head
1
65
100007541
Starter Cup
1
17
100010383-0001
Stud M5×54
2
66
100007181-0002
Recoil Starter Assembl y
1
19
100006547
Muffler Gasket B
1
78
100004273
Camshaft
1
20
100010420-0001
Screw M5×10
1
79
100004352
Camshaft Cover
1
21
100006155
Muffler
1
80
100004373
Release Valve
1
22
100011451-0002
Nut M5
8
81
100004382
Return Spring
1
23
100005549
Insulator Gasket A
1
82
100004329
Drive Timing Gear
1
24
100011146-0001
Bolt M5×55
2
83
100002590
Crankcase
1
25
100005583
Insulator
1
84
100009481
Flywheel
1
26
100010418-0001
Screw M5×20
5
85
100007070
Flywheel Cover
1
27
100005165
Carburetor
1
86
100011456-0002
Nut M10×1.25
1
29
100004627-0002
Air Filter Assembly
1
88
100007165-0002
Shroud
1
30
100005791
Choke Lever
1
89
100007741
Clutch Assembly
1
32
100005711
Choke Plate
1
97
100008744
Fuel Cap
1
33
100051870
Air Filter Base
1
98
100008815
Plug
1
34
100004804
Air Filter Element
1
99
100031375
Fuel Cap Cover
1
35
100004823
Air Filter Cover
1
100
100008793
Fuel Cap Gasket
1
36
100004957
Bolt 1 101
100021457
Plug 1 37
100009184
Ignition Module
1
102
100008538
Fuel Tank
1
39
100010539
Washer 6
1
104
100017668
Fuel Hose 2.5×5.3× 2 70
1
40
100011528-0003
Bolt M6×10
1
105
100010813
Washer 5
4
41
100004464
Lower Rocker Arm
2
106
100009032
Float Filter
1
42
100004517
Intake Valve
1
107
100009031
Float 1 43
100004540
Exhaust Va lve
1
108
100008927
Damping Pad
3
44
100010190
Cylinder Head Gasket
1
109
100008661
Fuel Tank Guard
1
45
100010403-0001
Stud M5×30
4
110
100010417-0001
Screw M5×15
4
46
100010542
Pin 4×8
4
111
100030031
Insulator Gasket B
1
47
100003412
Connecting Rod
1
1 100002804 Breather Hose 1
5 100011001-0001 Screw ST4.2×10 1
8 100004487 Lock Nut 2
11 100004481 Pin 1
18 100006544 Muffler Ga s ke t A 2
48 100010576 Woodruff Key 1
52 100003227 Piston Ring Set 1
55 100030448 Oil Ring 1
58 100002919 Crankcase Cover 1
77 100004350 Camshaft Pin 1
28 100005663 O-Ring 1
31 100004963 Air Filter Base 1
38 100004483 Pin 1
87 100010422-0001 Screw M5×13.5 2
95 100006570-0001 Muffler Plate 1
103 100017667 Fuel Hose 2.5×5.3×230 1
19
Brush cutter exploded view
20
Brush cutter parts list
Item
Stock #
Description
Qty
Item
Stock #
Description
Qty
1
303190256
31cc 4 Stroke Engine
1
18
303020553
Screw M5x12
1 2 202310001
Connector component
1
19
202260002
Gear box component
1 3 303020553
Screw M5x12
1
20
303020555
Screw M5x25
2 4 303020554
Screw M6x30
1
21
303020553
Screw M5x12
1 5 303020554
Screw M6x30
4
23
303080492
Upper handle
1 6 302100009
Straps hanging ring
1
24
303170012
Transmissi on shaft
2 7 303020555
Screw M5x25
1
25
303060134
Bush 6 8
302100010
Fixed ring
1
26
303020084
Screw M6x16
2 9 303030120
Pipe 1 27
303071040
Bracket
1
10
202110046
Straight ha ndle component
1
28
203050391
Shield
1
11
303010330
Screw ST4.2x15
3
29
303080493
Lower handle
1
12
303010331
Screw ST2.5x20
2
30
302120038
Straps
1
13
303010330
Screw ST4.2x15
1
32
303020084
Screw M6x16
2
14
303020110
Screw M5x20
2
33
303071042
Bracket
2
15
303030030
Nylon Locknut M5
2
34
303030032
Nylon Locknut M6
2
16
202310002
Middle connector c om ponen t
1
35
203010822
Handlebar
1
17
303020555
Screw M5x25
1
21
TWO (2) YEARS LIMITED WARRANTY
PowerSmart is committed to building equipment that will provide years of dep e n dable se rv ice. O u r wa rr ant ies a re
consistent with our commitment and dedication to quality.
TWO (2) YEARS LIMITED WARRANTY OF POWER SMART PRODUCTS FOR HOME USE.
PowerSmart (“Seller") warrants to the original purchaser only, that all PowerSmart consumer power tools will be
free from defects in material or workmanship for a period of two (2) years from date of purchase. If the tool(s) is
used while providing professional or commercial services, the warranty coverage shall be for a maximum of (90)
days.
SELLER’S SOLE OBLIGATION AND YOUR EXCLUSIVE REMEDY under this Two (2) Years Limited
Warranty and, to the extent permitted by law, any warranty or condition implied by law, shall be the re¬pair or
replacement of parts, without charge, which are defective in material or workmanship and which have not been
misused, carelessly handled, or improperly repaired, by person(s) other than an Authorized Seller or Service
Center.
Please be aware that normal wear parts are not covered this warranty. This includes drive belts, blades and grass
bags. Carburetor issues, and/or other damage found to be the result of stale, cont a m inated or com prom ised fuel, is
not covered under this limited warranty.
To make a claim under this Limited Warranty, you must return the entire power tool product; transportation
prepaid, to PowerSmart. The owner must include a legible copy of the original receipt, which shall list the date of
purchase, along with the company’s name where the product was purchased.
THIS LIMITED WARRANTY DOES NOT APPLY TO ANY ACCESSORY ITEMS INCLUDED WITH THE
TOOL SUCH AS CIRCULAR SAW BLADES OTHER RELATED ITEMS OR TO ANY REPLACEMENT
PARTS LISTED UNDER MAINTENANCE.
ANY IMPLIED WARRANTIES SHALL BE LIMITED IN DURATION TO TWO (2) YEARS FROM DATE OF
PURCHASE. SOME STATES IN THE U.S. AND SOME CANADIAN PROVINCES DO NOT ALLOW
LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY
NOT APPLY TO YOU.
IN NO EVENT SHALL SELLER BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES
(INCLUDING BUT NOT LIMITED TO LIABILITY FOR LOSS OF PROFITS) ARISING FROM THE SALE
OR USE OF THIS PRODUCT. SOME STATES IN THE U.S. AND SOME CANADIAN PROVINCES DO NOT
ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO
THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU.
THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE
OTHER RIGHTS WHICH VARY FROM STATE TO STATE IN THE U.S., PROVINCE TO PROVINCE IN
CANADA AND FROM COUNTRY TO COUNTRY.
For questions, comments, technical assistance or to order repair parts
Please call toll free at: 1-800-791-9458 (M-F 9am – 5pm CST)
Email: support@amerisuninc.com
PLEASE SAVE ALL OF YOUR ORIGINAL RECEIPTS. THIS WARRANTY IS VOID WITHOUT THEM.
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