Echo PB-252 LA User manual

Power Blower
Operator's Manual
MODEL PB-252 LA
X750020721
03/13
X7501183901
WARNING
Users of this equipment risk injury to themselves and others if the unit is used im-
properly and/or safety precautions are not followed. ECHO provides an operator’s
manual. It must be read and understood for proper and safe operation. Failure to do
so could result in serious injury.

2
Table of ConTenTs
Introduction................................................................2
- The Operator's Manual .......................................2
Safety .........................................................................3
- Manual Safety Symbols and Important
Information .........................................................3
- International Symbols.........................................3
- Personal Condition and Safety Equipment ......... 3
- Equipment Check................................................6
Description.................................................................7
Contents .....................................................................8
Assembly....................................................................9
- Install Blower Pipes............................................9
- Remove Blower Pipes.......................................10
Operation..................................................................10
- Fuel ...................................................................10
- Starting Cold Engine.........................................12
- Starting Warm Engine....................................... 13
- Stopping Engine................................................13
- Operating Blower..............................................14
Maintenance.............................................................15
- Skill Levels .......................................................15
- Maintenance Intervals.......................................15
- Air Filter ...........................................................16
- Fuel Filter..........................................................16
- Spark Plug.........................................................17
- Cooling System.................................................17
- Exhaust System.................................................18
- Carburetor Adjustment......................................20
- High Altitude Operation .................................20
Troubleshooting .......................................................21
Storage .....................................................................23
Specications ...........................................................24
Servicing Information ..............................................28
- Parts/Serial Number..........................................28
- Service ..............................................................28
- ECHO Consumer Product Support...................28
- Warranty Card...................................................28
- Additional or Replacement Manuals ................28
Specications, descriptions and illustrative material in this
literature are as accurate as known at the time of publica-
tion, but are subject to change without notice. Illustrations
may include optional equipment and accessories, and may
not include all standard equipment.
InTroduCTIon
Welcome to the ECHO family. This ECHO product was designed and manufactured to provide long life and on-the-
job dependability. Read and understand this manual. You will nd it easy to use and full of helpful operating tips and
SAFETY messages.
The operaTor'smanual
Keep it in a safe place for future reference. Contains specications and
information for operation, maintenance, storage, and assembly specic
to this product.
Copyright© 2013 By Echo, Incorporated
All Rights Reserved.
1
Power Blower
Operator's Manual
MODEL PB-251
X75300
09/06
X753118
WARNING
Read rules for safeoperation andinstructions carefully. ECHO providesthis Operator's
Manual,which must be read and understood for proper and safe operation.
PB251ef_091206.pmd
Power Blower
Operator's Manual
MODEL PB-250
WARNING
Read rules for safe operation and instructions carefully. ECHO provides this
Operator's Manual, which must be read and understood for proper and safe opera-
tion.
X750012940
XX/XX
X7501182000

3
Power Blower
oPerator'sManual
safeTy
manual safeTy symbols and ImporTanT InformaTIon
Throughout this manual and on the product itself, you will nd safety alerts and helpful, informational messages
preceded by symbols or key words. The following is an explanation of those symbols and key words and what they
mean to you.
InTernaTIonal symbols
Symbol
description/application Symbol form/shape Symbol
description/application
Symbol form/shape
Read and understand
Operator's Manual. Fuel and oil mixture
Hot
Surface
Wear eyes, ears and
head protection
Finger Severing
Safety/Alert
Wear hand
protection. Use
two handed.
DO NOT smoke
near fuel.
DO NOT allow
ames or sparks
near fuel.
Wear slip resis-
tant foot wear.
WARNING
The safety alert symbol accompanied by the word
“WARNING” calls attention to an act or condi-
tion which CAN lead to serious personal injury or
death if not avoided.
CIRCLE AND SLASH SYMBOL
This symbol means the specic action
shown is prohibited. Ignoring these prohi-
bitions can result in serious or fatal injury.
CAUTION
The safety alert symbol accompanied by the word
“CAUTION” calls attention to an act or condition
which may lead to minor or moderate personal
injury if not avoided.
NOTE
This enclosed message provides tips for use, care and
maintenance of the unit.
IMPORTANT
The enclosed message provides information neces-
sary for the protection of the unit.
DANGER
The safety alert symbol accompanied by the word
“DANGER” calls attention to an act or condition
which WILL lead to serious personal injury or
death if not avoided.
Symbol
description/application Symbol form/shape Symbol
description/application
Symbol form/shape
Carburetor adjustment
- Idle speed
Carburetor adjustment
- High speed mixture
Emergency stop
Carburetoradjustment
- Low speed mixture
Ignition
ON/OFF
Primer bulb
Choke Control
"Cold Start"
Position
(Choke Closed)
Choke Control
"Run"
Position
(Choke Open)
Idle Speed Fast Speed
personal CondITIon and safeTy equIpmenT
WARNING
Users of this product risk injury to themselves and others if the unit is used improperly and/or safety precautions are
not followed. Proper clothing and safety gear must be worn when operating unit.

4
Physical Condition
Your judgment and physical dexterity may not be good:
• if you are tired or sick,
• if you are taking medication,
• if you have taken alcohol or drugs.
Operate unit only if you are physically and mentally well.
Eye Protection
Wear eye protection that meets ANSI Z87.1 or CE require-
ments whenever you operate the unit.
Hand Protection
Wear no-slip, heavy-duty work gloves to improve your grip
on the blower handle. Gloves also reduce the transmission of
machine vibration to your hands.
Breathing Protection
Wear a facemask to protect against dust.
Hearing Protection
ECHO recommends wearing hearing protection whenever
unit is used.
Vibration and Cold
It is believed that a condition called Raynaud’s Phenomenon, which affects the ngers of certain individuals, may be
brought about by exposure to vibration and cold. Exposure to vibration and cold may cause tingling and burning sen-
sations, followed by loss of color and numbness in the ngers. The following precautions are strongly recommended,
because the minimum exposure, which might trigger the ailment, is unknown.
• Keep your body warm, especially the head, neck, feet, ankles,
hands, and wrists.
• Maintain good blood circulation by performing vigorous arm
exercises during frequent work breaks, and also by not smoking.
• Limit the hours of operation. Try to ll each day with jobs where
operating the unit or other hand-held power equipment is not
required.
• If you experience discomfort, redness, and swelling of the ngers
followed by whitening and loss of feeling, consult your physician
before further exposing yourself to cold and vibration.
Proper Clothing
Wear snug tting, durable clothing;
• Pants should have long legs, shirts with long sleeves.
• DO NOT WEAR SHORTS,
• DO NOT WEAR TIES, SCARVES, JEWELRY,
or clothing with loose or hanging items that could
become entangled in moving parts or surrounding
growth..
Wear sturdy work shoes with nonskid soles;
• DO NOT WEAR OPEN TOED SHOES,
• DO NOT OPERATE UNIT BAREFOOTED.
Wear no-slip, heavy duty work gloves.
Keep long hair away from engine and air intake. Retain
hair with cap or net.
Hot Humid Weather
Heavy protective clothing can increase operator fatigue
which may lead to heat stroke. Schedule heavy work for
early morning or late afternoon hours when temperatures
are cooler.
WARNING
The ignition components of this machine generate an electromagnetic eld during operation which may interfere
with some pacemakers. To reduce the risk of serious or fatal injury, persons with pacemakers should consult with
their physician and the pacemaker manufacturer before operating this machine. In the absence of such informa-
tion, ECHO does not recommend the use of ECHO products by anyone who has a pacemaker.

5
Power Blower
oPerator'sManual
DANGER
Do not operate this product indoors or in inadequately ventilated
areas. Engine exhaust contains poisonous emissions and can cause
serious injury or death.
Read the Manuals
• Provide all users of this equipment with the Operator’s Manual
for instructions on Safe Operation.
Clear the Work Area
• Spectators and fellow workers must be warned, and children and
animals prevented from coming nearer than 15 m (50 ft.) while
the unit is in use.
• Take wind conditions into account: avoid open doors and win-
dows.
• Do not point blower at people or animals.
• Review area to be cleared. Look for potential hazards such as
stones or metal objects.
Keep a Firm Grip
• Hold the handle in one hand, with thumb and ngers encircling
the handle.
Keep a Solid Stance
• Maintain footing and balance at all times. Do not stand on slip-
pery, uneven or unstable surfaces. Do not work in odd positions
or on ladders. Do not over reach.
Avoid Hot Surfaces
• Keep exhaust area clear of ammable debris. Avoid contact dur-
ing and immediately after operation.
Repetitive Stress Injuries
It is believed that overusing the muscles and tendons of the ngers, hands, arms, and shoulders may cause soreness,
swelling, numbness, weakness, and extreme pain in those areas. Certain repetitive hand activities may put you at a high
risk for developing a Repetitive Stress Injury (RSI). An extreme RSI condition is Carpal Tunnel Syndrome (CTS), which
could occur when your wrist swells and squeezes a vital nerve that runs through the area.
Some believe that prolonged exposure to vibration may contribute to CTS. CTS can cause severe pain for months or
even years.
To reduce the risk of RSI/CTS, do the following:
• Avoid using your wrist in a bent, extended, or twisted position.
Instead try to maintain a straight wrist position. Also, when
grasping, use your whole hand, not just the thumb and index
nger.
• Take periodic breaks to minimize repetition and rest your hands.
• Reduce the speed and force with which you do the repetitive
movement.
• Do exercises to strengthen the hand and arm muscles.
• Immediately stop using all power equipment and consult a doc-
tor if you feel tingling, numbness, or pain in the ngers, hands,
wrists, or arms. The sooner RSI/CTS is diagnosed, the more
likely permanent nerve and muscle damage can be prevented.

6
equIpmenT CheCk
WARNING
Use only ECHO approved attachments. Serious injury may result from the use of a non-approved attachment combi-
nation. ECHO, INC. will not be responsible for the failure of cutting devices, attachments or accessories which have
not been tested and approved by ECHO. Read and comply with all safety instructions listed in this manual and safety
manual.
• Check unit for loose/missing nuts, bolts and screws. Tighten and/or replace as needed.
• Do not use blower if any part is missing or damaged.
• Have repairs done only by an authorized ECHO Service dealer.
• Do not use any attachment, accessory or replacement part unless it is recommended in this Operator's Manual.
WARNING
Moving parts can amputate ngers or cause severe injuries. Keep hands, clothing and loose objects away from all
openings.
• ALWAYS stop engine, disconnect spark plug, and make sure all moving parts have come to a complete stop
before removing obstructions, clearing debris, or servicing unit.
• DO NOT start or operate unit unless all guards and protective covers are properly assembled to unit.
• NEVER reach into any opening while the engine is running. Moving parts may not be visible through openings.
WARNING
Check fuel system for leaks due to fuel tank damage, especially if the unit is dropped. If damage or leaks are found,
do not use unit, otherwise serious personal injury or property damage may occur. Have unit repaired by an authorized
servicing dealer before using.

7
Power Blower
oPerator'sManual
desCrIpTIon
Locate the safety decals on your unit. Make sure the decals are legible and that you understand and follow the instruc-
tions on them. If a decal cannot be read, a new one can be ordered from your ECHO dealer. See PARTS ORDERING
instructions for specic information.
Hot Decal (near mufer and engine)
General Warning Decal (located on blower housing)
1
10
1
2
45
6
9
10 12
13
3
8
11
7

8
1. SAFETY DECAL - Lists important safety precautions.
2. STOP SWITCH - "SLIDE SWITCH" mounted on top of handle. Push forward to start and run. Slide back to stop.
3. SPARK PLUG - Provides spark to ignite fuel mixture.
4. FUEL TANK CAP - Covers and seals fuel tank.
5. RECOIL STARTER HANDLE - Pull recoil handle slowly until recoil starter engages, then quickly and rmly.
When engine starts, return handle slowly. DO NOT let handle snap back or damage to unit will occur.
6. CHOKE - Choke is located on top of the air cleaner. Move choke lever to "COLD START" ( ) to close choke
for cold starting. Move choke lever to "RUN" position to open choke.
7. PURGE BULB - Pumping purge bulb before starting engine draws fresh fuel from the fuel tank, purging air from
the carburetor. Pump purge bulb until fuel is visible and ows freely in the clear fuel tank return line. Pump purge
bulb an additional 4 or 5 times.
8. SPARK ARRESTOR MUFFLER OR SPARK ARRESTOR MUFFLER WITH CATALYST -The mufer or
catalytic mufer controls exhaust noise and emission. The spark arrestor screen prevents hot, glowing particles of
carbon from leaving the mufer. Keep exhaust area clear of ammable debris.
9. BLOWER PIPES - Exclusive positive locking system.
10. SAFETY DECAL - Lists important safety precautions.
11. THROTTLE POSITION LEVER - Pull back to increase engine speed. Friction washers maintain throttle lever
setting.
12. THROTTLE TRIGGER - Spring loaded to return to idle when released. During acceleration, press trigger gradu-
ally for best operating technique.
13. AIR CLEANER - Contains replaceable air lter element.
ConTenTs
1 - Power Head
1 - Blower Pipe (upper)
1 - Blower Pipe
1 - Blower Pipe (ared)
1 - Operator's Manual
- Assembly Tool (s)
1
Power Blower
Operator's Manual
MODEL PB-251
X75300
09/06
X753118
WARNING
Read rules for safeoperation andinstructions carefully. ECHO providesthis Operator's
Manual,which must be read and understood for proper and safe operation.
PB251ef_091206.pmd
Power Blower
Operator's Manual
MODEL PB-250
WARNING
Read rules for safe operation and instructions carefully. ECHO provides this
Operator's Manual, which must be read and understood for proper and safe opera-
tion.
X750012940
XX/XX
X7501182000

9
Power Blower
oPerator'sManual
assembly
WARNING
Never perform maintenance or assembly procedures with engine
running or serious personal injury may result.
InsTall blower pIpes
1. Stand unit upright on blower base.
2. Align locking ribs (A) on upper blower pipe with recesses (B) in
fan case. Assure short locking rib (C) faces downward. Slide up-
per blower pipe into fan case until a clicking sound is heard.
3. Align tabs (D) with grooves (E) and slide lower blower pipe over
upper pipe until there is light resistance. Do not force connection.
4. Hold upper pipe, and turn lower pipe clockwise, engaging posi-
tive locking channels until connection is rm. Do not force con-
nection.
NOTE
Blower use will eventually loosen pipe connections. Exclusive
positive locking system allows pipes to be tightened. If loosening
occurs, remove lower straight pipe, and install according to instruc-
tions 3 & 4.
blower pipe (upper)
blower pipe (lower)
B
C
A
D
E

10
WARNING
Moving parts can amputate ngers or cause severe injuries. Keep hands, clothing and loose objects away from all
openings. Always stop engine, disconnect spark plug, and make sure all moving parts have come to a complete stop
before removing obstructions, clearing debris, or servicing unit. Blower housing may contain shredder blades and
other sharp edges that can cause serious injuries if touched, even if engine is off and blades are not moving. Wear
gloves to protect hands from sharp edges and hot surfaces.
fuel
NOTICE: Use of unmixed, improperly mixed, or fuel older than 90 days, (stale fuel), may cause hard starting, poor
performance, or severe engine damage and void the product warranty. Read and follow instructions in the Storage
section of this manual.
WARNING
Fuel containing more than 25% ethanol is NOT approved for use in ECHO 2-stroke gasoline engines. Fuel con-
taining more than 25% ethanol may cause performance problems, loss of power, overheating, fuel vapor lock, and
unintended machine operation, including, but not limited to, improper clutch engagement. Fuel containing more than
25% ethanol may also cause premature deterioration of fuel lines, gaskets, carburetors and other engine components.
remove blower pIpes
1. Insert screwdriver (F) into hole located near lock symbol (G) to
release pipe lock.
CAUTION
Screwdriver tip may stick out opposite side of locking hole.
2. Pull pipe out of fan case.
3. Remove screwdriver.
operaTIon
WARNING
Operation of this equipment may create sparks that can start res around dry vegetation. This unit is equipped
with a spark arrestor and a spark arrestor may be required. The operator should contact local re agencies for
laws or regulations relating to re prevention requirements.
F
G

11
Power Blower
oPerator'sManual
Mixing Instructions
1. Fill an approved fuel container with half of the required amount
of gasoline.
2. Add the proper amount of 2-stroke oil to gasoline.
3. Close container and shake to mix oil with gasoline.
4. Add remaining gasoline, close fuel container, and remix.
IMPORTANT
Spilled fuel is a leading cause of hydrocarbon emissions. Some
states may require the use of automatic fuel shut-off containers
to reduce fuel spillage.
After use
• DO NOT store a unit with fuel in its tank. Leaks can occur. Return
unused fuel to an approved fuel storage container.
IMPORTANT
Storage - Fuel storage laws vary by locality. Contact your local
government for the laws affecting your area. As a precaution, store
fuel in an approved, airtight container. Store in a well-ventilated,
unoccupied building, away from sparks and ames.
Handling Fuel
DANGER
Fuel is VERY ammable. Use extreme care when mixing, storing or handling or serious personal injury may result.
• Use an approved fuel container.
• DO NOT smoke near fuel.
• DO NOT allow ames or sparks near fuel.
• Fuel tanks/cans may be under pressure. Always loosen fuel caps slowly allowing pressure to equalize.
• NEVER refuel a unit when the engine is HOT or RUNNING!
• DO NOT ll fuel tanks indoors. ALWAYS ll fuel tanks outdoors over bare ground.
• DO NOT overll fuel tank. Wipe up spills immediately.
• Securely tighten fuel tank cap and close fuel container after refueling.
• Inspect for fuel leakage. If fuel leakage is found, do not start or operate unit until leakage is repaired.
• Move at least 3m (10 ft.) from refueling location before starting the engine.
Fuel Requirements
Gasoline - Use 89 Octane (mid grade or higher) gasoline known to be good quality. Gasoline may contain up to 25%
Ethanol. Gasoline containing methanol (wood alcohol) is NOT approved.
Two Stroke Oil - A two-stroke engine oil meeting ISO-L-EGD (ISO/CD 13738) and J.A.S.O. FD Standards must be
used. Echo brand premium Power Blend X TM Universal 2-Stroke Oil meets these standards. Engine problems due to
inadequate lubrication caused by failure to use an ISO-L-EGD (ISO/CD 13738) and J.A.S.O. FD certied oil, such as
Echo premium Power Blend X TM, will void the two-stroke engine warranty.
IMPORTANT
Stored fuel ages. Do not mix more
fuel than you expect to use in thirty
(30) days, ninety (90) days when a
fuel stabilizer is added.
IMPORTANT
Stored two-stroke fuel may separate.
ALWAYS shake fuel container thor-
oughly before each use.
IMPORTANT
Echo premium Power Blend X TM Universal 2-Stroke Oil may be mixed at 50:1 ratio for application in all Echo en-
gines sold in the past regardless of ratio specied in those manuals.

12
sTarTIng Cold engIne
1. Stop Switch
Move stop switch button (A) away from the STOP position.
2. Throttle Position Lever
Move throttle position lever (B) midway between idle and full
throttle positions.
3. Choke
Move choke (C) to Cold Start ( ) Position.
4. Purge Bulb
Pump purge bulb (D) until fuel is visible and ows freely in the
clear fuel tank return line.
B
A
IMPORTANT
Recoil starter: Use short pulls - only 1/2 ~ 2/3 of rope for start-
ing. Do not allow the rope to snap back in. Always hold the unit
rmly.
5. Recoil Starter
Place the unit on a at, clear area. Firmly grasp throttle grip with
left hand and rapidly pull recoil starter handle/rope (E) until en-
gine res , or maximum 5 pulls.
6. Choke
Move choke lever (C) to Run position, and if necessary, restart
engine.
NOTE
If engine does not start after 5 pulls, repeat instructions 3-6.
7. After engine warm up, gradually depress throttle trigger to in-
crease engine RPM to operating speed.
NOTE
Allow engine to warm up 3 minutes before use.
E
C
D
C

13
Power Blower
oPerator'sManual
sToppIng engIne
1. Throttle Trigger/Throttle Position Lever
Release throttle trigger (F). Move throttle position lever (B)
forward to idle position and allow engine to return to idle before
shutting off engine.
2. Stop Switch
Move stop switch (A) to “STOP” position.
WARNING
If engine does not stop when stop switch is moved to STOP posi-
tion, close choke - COLD START ( ) position - to stall engine.
Have your ECHO dealer repair stop switch before using blower
again.
sTarTIng warm engIne
The starting procedure is the same as Cold Start except DO NOT close
the choke.
1. Stop Switch
Move stop switch button (A) away from the STOP position.
2. Throttle Position Lever
Move throttle position lever (B) midway between idle and full
throttle positions.
3. Purge Bulb
Pump purge bulb (D) until fuel is visible and ows freely in the
clear fuel tank return line.
4. Recoil Starter
Place the unit on a at, clear area. Firmly grasp throttle grip with
left hand and rapidly pull recoil starter handle/rope (E) until en-
gine res.
IMPORTANT
Recoil starter: Use short pulls - only 1/2 ~ 2/3 of rope for start-
ing. Do not allow the rope to snap back in. Always hold the unit
rmly.
NOTE
If engine does not start after 5 pulls, use Cold Start Procedure.
F
B
A
B
A
E
DD

14
operaTIng blower
WARNING
Engine exhaust IS HOT, and contains Carbon Monoxide (CO), a
poison gas. Breathing CO can cause unconsciousne, serious injury,
or death. Exhaust can cause serious burns. ALWAYS position unit
so that exhaust is directed away from your face and body.
WARNING
Always wear safety glasses, hearing protection and a face lter
mask or serious personal injury may result. Do not point the blower
pipe in the direction of people or pets.
F
B
IMPORTANT
Use reduced speed only when performing light-duty tasks or
to comply with local noise regulations. Continuous low speed
operation may allow fuel/oil residue to build-up on the piston
and cause rapid build-up of carbon on the spark arrestor screen,
resulting in overheating and engine damage. To reduce harmful
build-up, run engine at wide open throttle for at least 5 minutes
every hour, and inspect/clean the spark arrestor screen after ap-
proximately 40 hours of operation.
Read the Safety Section carefully.
IMPORTANT
To avoid engine damage due to over-revving, do not block
blower pipe.
1. Use only during appropriate hours.
2. Allow the engine to warm up at a fast idle for a few minutes.
3. Control engine speed with throttle trigger (F), or for continu-
ous use, set engine speed with throttle position lever (B). Rotate
throttle position lever forward for lower speed, back for higher
speed.
4. Use lower speed to blow debris from hard surfaces.
5. Additional speed may be necessary to clean debris, snow, etc.
from lawns and owerbeds.
NOTE
Never use a higher speed setting than necessary to perform a task.
Remember, the higher the engine speed, the louder the blower
noise. Minimize dust by using blower at lower speeds. Keep debris
on your property.
Be Smart - be a good neighbor.

15
Power Blower
oPerator'sManual
maInTenanCe InTervals
maInTenanCe
Your ECHO blower is designed to provide many hours of trouble free service. Regular scheduled maintenance will help
your blower achieve that goal. If you are unsure or are not equipped with the necessary tools, you may want to take your
unit to an ECHO Service Dealer for maintenance. To help you decide whether you want to DO-IT-YOURSELF or have
the ECHO Dealer do it, each maintenance task has been graded. If task is not listed, see your ECHO Dealer for repairs.
skIll level
Level 1 = Easy to do. Common tools may be required.
Level 2 = Moderate difculty. Some specialized tools may be required.
ECHO offers REPOWERTM Maintenance Kits and Parts to make your maintenance job easier.
WARNING
Moving parts can amputate ngers or cause severe injuries. Keep hands, clothing and loose objects away from all
openings. Always stop engine, disconnect spark plug, and make sure all moving parts have come to a complete stop
before removing obstructions, clearing debris, or servicing unit. Allow unit to cool before performing service. Wear
gloves to protect hands from sharp edges and hot surfaces.
COMPONENT / SYSTEM MAINTENANCE
PROCEDURE
REQ'D
SKILL
LEVEL
DAILY OR
BEFORE USE
EVERY
REFUEL 3 MONTHS YEARLY
Air Filter Inspect/Clean 1I / C * R *
Choke Shutter Inspect/Clean 1I / C
Fuel Filter Inspect/Replace 1I * I / R *
Fuel Cap Gasket Inspect/Replace 1I * R *
Fuel System Inspect/Replace 1I * I *
Spark Plug Inspect/Clean/Replace 1I / C / R *
Cooling System Inspect/Clean 2I / C
Muffler Spark Arrestor Inspect/Clean/Replace 2I / C / R *
Cylinder Exhaust Port Inspect/Clean/Decarbon 2I / C
Recoil Starter Rope Inspect/Clean 1I / C *
Vacuum Bag Inspect/Replace 1I / R
Screws/Nuts/Bolts Inspect/Tighten/Replace 1I *
* All recommendations to replace are based on the finding of damage or wear during inspection.
MAINTENANCE PROCEDURE LETTER CODES: I = INSPECT, R = REPLACE, C = CLEAN
IMPORTANT NOTE - Time intervals shown are maximum. Actual use and your experience will determine the
frequency of required maintenance.
MAINTENANCE PROCEDURE NOTES:

16
aIr fIlTer
Level 1.
Parts required: REPOWERTM Air and Filter Kit
NOTE
Clean daily.
1. Close choke (Cold Start Position [ ]). This prevents dirt from
entering the carburetor throat when the air lter is removed. Brush
accumulated dirt from air cleaner area.
2. Remove air lter cover. Brush dirt from inside cover.
3. Remove air lter and lightly brush debris from lter. Replace
lter if it is damaged, fuel soaked, very dirty, or the rubber sealing
edges are deformed.
4. If lter can be reused, be certain it:
• Fits tightly in the air lter cavity.
• Is installed with the original side out.
5. Install air lter cover.
fuel fIlTer
Level 1.
Parts required: REPOWERTM Air and Filter Kit
DANGER
Fuel is VERY ammable. Use extreme care when mixing, storing
or handling.
1. Use a clean rag to remove loose dirt from around fuel cap and
empty fuel tank.
2. Use the “fuel line hook” to pull the fuel line and lter from the
tank.
3. Remove the lter from the line and install the new lter.

17
Power Blower
oPerator'sManual
CoolIng sysTem
Level 2.
Parts Required: None, if you are careful.
IMPORTANT
To maintain proper engine operating temperatures, cooling air must
pass freely through the cylinder n area. This ow of air carries
combustion heat away from the engine.
Overheating and engine seizure can occur when:
• Air intakes are blocked, preventing cooling air from reaching the
cylinder.
• Dust and grass build up on the outside of the cylinder. This build up
insulates the engine and prevents the heat from leaving.
Removal of cooling passage blockages or cleaning of cooling ns is
considered “Normal Maintenance”. Any failure attributed to lack of
maintenance is not warranted.
Cleaning Grill
1. Brush accumulated debris from crankcase intake grill above the
fuel tank.
0.65 mm
(0.026 in.)
spark plug
Level 2.
Parts Required: REPOWERTM Tune-Up Kit
IMPORTANT
Use only NGK BPM-8Y spark plug (BPMR-8Y in Canada)
otherwise severe engine damage may occur.
1. Remove spark plug and check for fouling, worn and rounded
center electrode.
2. Clean the plug or replace with a new one. DO NOT sand blast to
clean. Remaining sand will damage engine.
3. Adjust spark plug gap by bending outer electrode.
4. Tighten spark plug to 150-170 kgf • cm (130-150 in • lbf).

18
Cleaning Cylinder Fins
1. Remove spark plug lead from spark plug, and remove engine
cover.
Clean cylinder ns to allow cooling air to pass freely.
2. Loosely reassemble engine cover with 6 screws.
3. Tighten all screws securely.
4. Attach spark plug lead.
exhausT sysTem
Spark Arrestor Screen
Level 2.
Parts Required: Spark arrestor screen, Gasket
IMPORTANT
Carbon deposits in mufer will cause a drop in engine output and
overheating. Spark arrestor screen must be checked periodically.
1. Remove spark plug lead from spark plug, and remove engine
cover.
2. Remove spark arrestor cover (A), gasket (B), and spark arrestor
screen (C) from mufer. Replace screen if plugged with carbon
deposits.
NOTE
When cleaning carbon deposit, be careful not to damage the cata-
lytic element inside mufer.
3. Install spark arrestor screen, gasket, and cover.
4. Loosely reassemble engine cover.
5. Tighten all screws securely.
6. Attach spark plug lead.
A
B
C

19
Power Blower
oPerator'sManual
A
B
Exhaust Port Cleaning
Level 2.
Parts Required: As needed: Heat Shield
1. Remove spark plug lead from spark plug, and remove engine
cover.
2. Place piston at top dead center. Remove mufer (A) and heat
shield (B).
3. Use a wood or plastic scraping tool to clean deposits from cylin-
der exhaust port.
IMPORTANT
Never use a metal tool to scrape carbon from the exhaust port.
Do not scratch the cylinder or piston when cleaning the exhaust
port. Do not allow carbon particles to enter the cylinder.
4. Inspect heat shield, and replace if damaged.
5. Install heat shield and mufer.
6. Tighten mufer mounting bolts (or nuts) to 60-70 in•lbf (70-80
kgf•cm).
7. Loosely reassemble engine cover.
8. Tighten all screws securely.
9. Attach spark plug lead.
10. Start engine, and warm to operating temperature.
11. Stop engine, and re-tighten mounting bolts (or nuts) to specica-
tions.

20
CarbureTor adjusTmenT
Engine Break-In
New engines must be operated a minimum duration of two tanks of fuel
break-in before carburetor adjustments can be made. During the break-
in period your engine performance will increase and exhaust emissions
will stabilize. Idle speed can be adjusted as required.
High Altitude Operation
This engine has been factory adjusted to maintain satisfactory starting,
emission, and durability performance up to 1,100 feet above sea level
(ASL) (96.0 kPa). To maintain proper engine operation and emission
compliance above 1,100 feet ASL the carburetor may need to be ad-
justed by an authorized ECHO service dealer.
IMPORTANT
If the engine is adjusted for operation above 1,100 feet ASL, the
carburetor must be re-adjusted when operating the engine below
1,100 feet ASL, otherwise severe engine damage may result.
Level 2.
Parts required: None.
WARNING
Always operate unit in a clear work area. Keep hands clear of mov-
ing parts during adjustment otherwise serious bodily injury may
occur.
Idle Adjustment
Before adjustment make sure that:
• Air lter is clean and properly installed.
• Spark arrestor screen is free of carbon.
• Blower pipes are installed.
Start and run engine for 3 minutes at Wide Open Throttle (WOT).
Adjust idle speed screw to 3,000 +/- 300 RPM. If engine does not run
correctly after this adjustment, adjust carburetor.
1. Turn Hi mixture needle (B) clockwise (CW) until lightly seated.
And then turn Hi mixture needle (CCW) 1 turn. Turn idle mixture
needle (A) (CW) until lightly seated. And then turn idle mixture
needle (A) (CCW) 3 3/4 turns.
2. Turn idle adjust screw (D) (CW) until its head just touches boss
(G). Then turn it (CCW) 6 3/8 turns.
SERVICE INFORMATIONPB-250 7
2-2 Presetting Idle adjust screw, Idle mixture needle and Hi speed mixture needle
Tools Required : Small screwdriver with 2.5 mm
blade, electronic tachometer P/N 900303, limiter
plug removal tool P/N 91020. Parts Required : (2)
limiter plugs P/N P005-001270.
1. Remove plugs from Idle mixture needle hole (A)
and H mixture needle hole (B) using limiter plug
tool (C) as follows.
(1)Put limiter plug tool (C) on limiter plug in mixture
needle hole.
(2)Screw limiter plug tool counterclockwise (CCW)
2 turns into limiter plug pushing the tool against the
plug to engage tool threads.
(3)Pull out limiter plug tool, with the limiter plug,
from mixture needle hole.
(4)Repeat plug removal procedure for the other
mixture needle.
NOTE : If the plug is damaged and left in the hole,
use a needle or pin-shaped tool to remove de-
formed plug pieces.
2. Turn Hi speed mixture needle (B) clockwise (CW)
until lightly seated. And then turn Hi speed mixture
needle CCW 1 turns. Turn Idle mixture needle (A)
clockwise until lightly seated. And then turn Idle
mixture needle CCW 3 3/4 turns.
3. Turn Idle adjust screw (D) CW until its head
touches boss (G) as shown Fig 1. Then turn Idle
adjust screw (D) CCW 6 3/8 turns.
NOTE : The initial carburetor settings for Idle adjust screw, Idle and Hi speed mixture needles are
intended to start and run the engine before nal carburetor adjustments are made to conform the unit to
meet Emission Regulations. The actual number of turns needed for engine operation may vary.
(C)
1) 2) 3)
2 CARBURETOR ADJUSTMENT PROCEDURE
2-1 General adjusting rules
A. Before adjustment, check the following items.
1. The correct spark plug must be clean and properly gapped.
2. The air lter element must be clean and properly installed.
3. The mufer exhaust port must be clear of carbon.
4. The fuel lines, tank vent and fuel lter are in good condition and clear of debris.
5. The fuel is fresh ( > 89 octane : RON+MON ) and properly mixed at 50 : 1 with “ISO L-EGD” or “JASO
M345-FC/FD” 2 stroke oil.
6. All blower pipes are installed for proper engine loading.
B. Adjustment with limiter plugs on carburetor.
Start and run engine for 3 minutes at WOT. Adjust idle speed screw to 3,000 +/- 200 RPM. If engine does
not run correctly after this adjustment, proceed to the next step 2-2.
IMPORTANT : After adjusting carburettor according to the steps 2-2 and 2-3, the limiter plug(s) must
be installed in Idle and Hi speed mixture needle(s) hole(s) to comply with Emission Regulation.
2
(B)
(D) (A)
Fig1
(D)
(G)
(A)
(D)
(G)
(A)
SERVICE INFORMATION PB-250
8
2-3 Adjusting carburetor
1. Start and warm engine speed at WOT for 1 min-
ute.
2. Adjust Idle mixture needle (A) to reach maxi-
mum idle speed with 2.5 mm blade screwdriver (E).
3. Set idle speed to 3,400 RPM by turning Idle
adjust screw (D). Engine RPM should be stable at
3,400 +/- 20 RPM after Idle adjust screw adjust-
ment.
4. Turn Idle mixture needle (A) CCW to reduce idle
speed 400 RPM to set idle speed at 3,000 RPM.
The idle speed range is 2,900 to 3,100 RPM.
NOTE : Engine speed must be allowed to stabilize
a minimum of 20 seconds after each adjustment
of L mixture needle to assure accurate tachometer
readings.
5. Adjust Hi speed mixture needle (B) to reach
maximum WOT engine speed using 2.5mm blade
screwdriver (E).
6. Turn Hi speed mixture needle (B) CCW to re-
duce WOT engine speed 10-20 RPM. Minimum
WOT engine speed after adjusting should be over
6,900 RPM.
7. Stop and restart engine, and verify engine idle
speed ranges from 2,700 to 3,300 RPM, and WOT
engine speed ranges from 6,900 to 7,300 RPM.
When final adjustment is completed, the engine
should idle, accelerate smoothly, and attain WOT
per above specication.
8. After adjusting carburetor, insert and secure new
plug(s) (F) P005-001270 deep in the needle holes
per the Emission regulation using limiter plug tool
(C).
NOTE : Engine WOT, and idle speed in eld oper-
ation may vary from nal adjustment specications
due to changing ambient conditions, fuel, and en-
gine loads. Safe engine RPM variances should be
within the safe ranges for WOT and Idling speed
as listed in Section 1-2, otherwise the carburetor
should be readjusted.
(C)
(F)
(F)
(C)
(A)
(E)
(E)
(B)
(D)
(D)