Shindaiwa 68241-94310 Owner's manual

Minimize the risk of injury to yourself and others!
Read this manual and familiarize yourself with the con-
tents. Always wear eye and hearing protection when
operating this unit. Minimize the risk of injury: Read this
manual and familiarize yourself with its contents.
EB501/EVC BLOWER
High Performance
SHINDAIWA OWNER’S/0PERATOR'S MANUAL
WARNING!
Part Number 68241-94310 Rev. 11/06

CONTENTSINTRODUCTION
Attention Statements ........................... 2
Nomenclature....................................... 3
Specifications........................................ 4
Assembling the Blower ....................... 4
Mixing Fuel .......................................... 6
Filling the Fuel Tank ........................... 7
Starting and Stopping the Blower ...... 8
Adjusting Engine Idle Speed............. 10
Adjusting the Harness....................... 11
Using the Blower ............................... 12
Routine Maintenance......................... 13
Spark Arrester Maintenance ............ 15
Storage ................................................ 16
Troubleshooting Guide ..................... 17
Emission System Warranty............... 21
PAGE
IMPORTANT!
Before using this product, consult
local regulations concerning noise
restrictions and hours of operation!
The Shindaiwa EB501 has been
designed and built to deliver superior
performance and reliability without
compromise to quality, comfort, safety,
or durability.
Shindaiwa high performance
engines represent the leading edge of
2-cycle engine technology, and deliver
exceptionally high power at remark-
ably low displacement and weight. As
a professional owner/operator, you’ll
soon discover why Shindaiwa is simply
in a class by itself!
IMPORTANT!
The information contained in this
manual describes machines available
at the time of production. While every
attempt has been made to give you
the very latest information about your
Shindaiwa EB501 blower, there may
be some differences between your
machine and what is described here.
Shindaiwa Inc. reserves the right to
make changes in production without
prior notice, and without obligation to
make alterations to machines previ-
ously manufactured.
CAUTION!
The engine exhaust from this
product contains chemicals known
to the State of California to cause
cancer, birth defects or other repro-
ductive harm.
CAUTION!
This EB501 blower is equipped
with a spark-arresting mufer!
Never operate this machine
without both the mufer and spark
arrester installed and properly
functioning!
1

ATTENTION STATEMENTS
This manual contains special “attention
statements” surrounded by boxes and
preceded by the triangular Attention
Symbol.
Read and follow this manual.
Failure to do so could result
in serious injury.
Wear eye and hearing
protection at all times during
the operation of this machine.
Do not operate this machine if
you are tired, ill or under the
influence of alcohol, drugs,
or medicine.
IMPORTANT!
The operational procedures described
in this manual are intended to help
you get the most from your machine
and also to protect you and others
from harm. These procedures are
general guidelines only, and are not
intended to replace any safety rules/
laws that may be in force in your area.
If you have any questions regarding
your EB501 blower, or if you do not
understand something in this manual,
your Shindaiwa dealer will be glad to
assist you.
For additional information, you may
also contact Shindaiwa Inc. at the
address printed on the back of this
manual.
WARNING!
A statement preceded by the word
“WARNING” contains information
that should be acted upon to pre-
vent serious bodily injury.
WARNING!
Do not make unauthorized modi-
cations to this machine!
Additional attention statements that
are not preceded by the Attention
Symbol are:
IMPORTANT!
A statement preceded by the word
“IMPORTANT” is one that possesses
special signicance.
NOTE:
A statement preceded by the word
“NOTE” contains information that is handy
to know and may make your job easier.
CAUTION!
A statement preceded by the word
“CAUTION” contains information
that should be acted upon to pre-
vent damaging your machine.
2

48002
NOMENCLATURE
Throttle and
Stop Lever
Air Cleaner
Spark Plug
Starter
Handle
Fuel Tank
Fuel Filler Cap
Swivel
Tube
Flexible
Tube
90° Discharge
Tube
Handgrip
Exhaust
Outlet
Carburetor with Choke
and Primer
Volute Case
Engine
Cover
Figure 1
3

SPECIFICATIONS
Model .................................................................................................................. EB501
Dimensions (L x W x H) ..............................................................330 x 375x 475 mm
Engine Type ................... 2 cycle, catalyst, air cooled gas engine, vertical-cylinder
Bore & Stroke.............................................................. 41 x 33 mm (1.6 x 1.3 inches)
Displacement........................................................................ 43.6 cc (2.66 cu. inches)
Fuel/oil ratio............. Gasoline/oil mixture (50:1 with ISO EGD or JASO FC class
2- cycle EngineOil)
Carburetor ............................................. Walbro diaphragm-type with primer pump
Ignition ........................................................ All transistor electronic ignition system
Spark Plug..............................................................................................Champion CJ8
Starting.................................................................................................... Recoil starter
Stopping ......................................................................... Throttle lever (fuel shut-off)
Fuel Tank Capacity ...........................................................................2.1 liters (71 oz.)
Exhaust System....................................................................... Spark-arrester muffler
Air Filtration .............................................................................................Dry element
Weight (dry; without blower tubes), EB501 ..................................... 8.6 kg (19 lbs.)
Specifications are subject to change without notice.
1. Place the blower upright on the
ground or a sturdy work surface.
2. Fit the 90° discharge tube over the
blower outlet port, and secure with
the 115mm dia. clamp.
3. Slip the flexible tube over the oppo-
site end of the 90° discharge tube,
and secure with the 100mm clamp.
4. Push the swivel tube into the
flexible tube, and then install and
tighten the 85mm clamp over the
rotating band on the swivel tube.
5. Slide the handgrip over the swivel
tube, and secure with the bolt,
washer, and nut.
ASSEMBLING THE BLOWER
Prior to Assembly
Before assembling, make sure you
have all the components required for a
complete unit:
n 90° Discharge Tube
n Flexible Tube
n Swivel Tube
n Straight Tube
n Nozzle Tube
n Handgrip (removable)
n Three Tube Clamps (115 mm,
100 mm, 85 mm) See figure 2.
Standard Tools
n Spark Plug Wrench
n Three Hex Wrenches
(3 mm, 4mm, 5mm)
4

48002A
48003
48004D
Lock Pin
Lock Slot
48004C
Rotate clockwise to lock, mak-
ing sure the 3 lines are aligned
on both tubes.
WARNING!
Danger from rotating impeller!
Stop the engine before installing or
removing the blower tubes! Never
perform any maintenance or as-
sembly procedures on this ma-
chine while the engine is running!
ASSEMBLING THE BLOWER (continued)
6. Grasp the straight tube as shown,
and push the tube over the
swivel tube locking pins (right).
See figure 3.
7. Lock the straight tube to the swivel
tube by rotating the straight tube.
8. Grasp the nozzle tube and lock the
nozzle to the straight tube as in
Steps 6 and 7.
IMPORTANT!
Blower tube installation affects blower
balance and performance! Make sure
the tubes and nozzle are correctly
assembled per above, and that all
connections are tight.
Tube Assembly
90° Discharge Tube Handgrip
Flexible Tube Swivel Tube Straight Tube Nozzle Tube
115mm Clamp
Swivel
Tube
Nut
Handgrip
Bolt
Washer
85mm Clamp
100mm Clamp
90° Discharge Tube Flexible Tube
Align the lock pins with the
lock slots, and push the tubes
together.
Figure 2
Figure 3
5

MIXING FUEL
Fuel Requirements
n Use only fresh, clean fuel.
n Use only fuel with an octane rating
of 87 or above.
n Mix all fuel with ISO EGD or JASO
FC class 2-cycle Engine Oil at a
gasoline/oil ratio of 50:1 (1 gallon
gasoline to 2.6 oz. mixing oil). CAUTION!
Never attempt to mix fuel in the
blower fuel tank! Always mix all fu-
els in a clean, approved container!
Some gasolines contain etha-
nol alcohol as an oxygenate!
Oxygenated fuels may cause
increased engine operating tem-
peratures! Under certain condi-
tions, alcohol-based fuels may also
reduce the lubricating qualities of
some mixing oils!
Never use any fuel containing
more than 10% ethanol alcohol by
volume!
Generic oils and some outboard
mixing oils are not intended for
use in high-performance air cooled
2-cycle engines, and should never
be used in your Shindaiwa blower!
IMPORTANT!
Mix only enough fuel for your imme-
diate needs! If fuel must be stored
longer than 30-days, it should rst
be treated with a stabilizer such as
StaBil™ or equivalent product!
WARNING!
Danger of re!
Never transfer or store fuels in the
presence of combustible materials!
Before starting the engine, always
move the blower to a clear area
at least 10 feet (3 meters) away
from fuels and other combustible
materials!
CAUTION!
Use of mixing oil other than ISO
EGD or JASO FC rated oil can
lead to exessive carbon deposits.
6

48005
FILLING THE FUEL TANK
1. Place the blower upright on the
ground or on a sturdy work surface
and wipe any debris from around
the fuel cap.
2. Remove the fuel cap. See figure 4.
3. Fill the tank with clean, fresh fuel
(see page 6).
4. Replace the cap and wipe away
any spilled fuel before starting the
blower engine.
WARNING!
Danger of re and burn
injury!
n Always use extreme care when
handling fuel! Fuel is highly flam-
mable!
n Never operate this blower if fuel
system components are damaged
or are leaking!
n Never attempt to refuel the
engine while it is running!
n Never attempt to refuel a hot
engine! Always allow the blower
engine to cool before fueling!
n Never smoke or light any fires
near the blower or fuels!
n Always transport and store fuels
in an approved container!
n Never place flammable material
close to the engine muffler!
n Never operate the blower with-
out a properly functioning muf-
fler and spark arrester installed!
n Never operate this blower unless
it is properly assembled and in
good working condition!
Remove the
Fuel Filler
Cap
Fuel
Tank
Figure 4
7

48008
48007
STARTING AND STOPPING THE BLOWER
WARNING!
Danger from rotating impeller!
The impeller will rotate whenever
the blower is operating! Never
operate this blower unless the
intake cover and blower tubes
are properly installed and in good
working order!
Starting Procedure
WARM OR COLD ENGINE
1. While squeezing the throttle lock
lever, move the throttle lever to the
“engine idle” position. See figure 5.
2. Prime the
fuel system
by depress-
ing the
fuel primer
bulb
repeat-
edly until
the bulb
fills with
fuel and
resistance
is felt. See
figure 6.
COLD ENGINE ONLY Choke the
engine by moving the choke control
UP (choke is closed).
3. Place the blower on the ground, and
hold the blower firmly with your left
hand on the volute case. See figure 7.
Choke Control (open
position shown)
Danger from thrown dust or de-
bris! Always wear eye and respira-
tory protection when operating this
machine! Never direct the blower
stream toward people or animals!
Never operate this blower unless
all controls are properly installed
and in good working order.
WARNING!
The engine cover will be hot after
blower operation!
4. Using your right hand, pull the
starter handle slowly until you feel
the starter engage.
Pull upward
rapidly
Avoid continuous running of the engine without the blower tubes installed,
or if the intake cover or blower tubes are blocked. Doing so can cause
engine overheating resulting in severe engine damage!
Full
Throttle
Engine
Idle
Stop
48006
Throttle Positions
Fuel Primer Bulb
CAUTION!
Figure 5 Lock Lever
Figure 6
Figure 7
8

IMPORTANT!
If the engine continues to run with the
throttle lever in the “off” position, stop
the engine by moving the choke control
UP to the fully closed position. Adjust
idle setting as decribed on page 10.
IF THE ENGINE DOES NOT START
Repeat the appropriate starting proce-
dures for “warm” or “cold” engine. If
the engine still will not start, follow the
“Starting a Flooded Engine” procedure
as below:
5. As the starter engages, pull the
starter handle upward rapidly.
6. If necessary, repeat Steps 4 and 5
2–3 times until the engine starts.
CAUTION!
The recoil starter can be damaged
by abuse!
nNever pull the starter cord to its
full length.
nAlways engage the starter
before cranking the engine.
Always rewind the starter cord
slowly.
WHEN THE ENGINE STARTS
1. As the engine warms, open the
choke gradually by slowly moving
the choke control down to the fully
OPEN position.
2. Run the engine at idle speed until
operating temperature is reached
(2-3 minutes).
The blower should now be ready
for use.
STOPPING THE ENGINE
1. Cool the engine by allowing it to
run at idle for 2–3 minutes.
2. While squeezing the throttle lock
lever, push and hold the throttle
lever down until the engine stops.
See figure 8.
STARTING A FLOODED ENGINE
1. Disconnect the spark plug lead,
and use the spark plug wrench to
remove the spark plug in a coun-
ter-clockwise direction (see the
diagram on page 14).
2. If the spark plug is fouled or is
soaked with fuel, clean or replace
the plug as required.
3. Clear excess fuel from the combus-
tion chamber by cranking the en-
gine several times while the spark
plug is removed.
4. Install and tighten the spark plug,
and reconnect the spark plug lead.
5. Repeat the starting procedures for
“warm engine.”
6. If the engine still fails to start or
fire, refer to the troubleshooting
flow chart at the end of this manual.
WARNING!
Never operate the blower unless all
controls are properly installed and
in good working order. Never oper-
ate the blower if the intake cover or
blower tubes are missing or dam-
aged!
48009
Throttle
Lever
Push Down To Stop
Squeeze Lock
Lever
Figure 8
9

48010
ADJUSTING ENGINE IDLE SPEED
1. Start the engine by following the
procedures described on the pre-
ceding pages. Make sure the thottle
lever is in the "idle" position.
2. Run the engine at idle speed until
operating temperature is reached
(2-3 minutes).
3. Loosen the throttle cable locknut.
See figure 9.
4. Turn the cable adjuster in or out
until the engine idles smoothly at
approximately 2500-3000 rpm.
nTurn the throttle cable adjuster
clockwise to decrease engine idle
speed.
nTurn the throttle cable adjuster
counter-clockwise to increase en-
gine idle speed.
5. Tighten the throttle cable locknut
securely.
IMPORTANT!
A clean and unrestricted airow is
essential to your blower’s engine
performance and durability! Before
attempting any carburetor adjust-
ments, inspect and clean the engine
air lter as described on page 13 of
this manual.
Throttle Cable
Locknut
Idle De-
crease
Idle
Increase
Cable
Adjuster
IMPORTANT!
Blower tubes and intake cover must
be in place while adjusting engine
idle! Engine idle speed will also be
affected if either the intake cover or
blower tubes are blocked or incor-
rectly installed!
Figure 9
10

48019B
48019A
48019
ADJUSTING THE HARNESS
The Shindaiwa EB501 Blower features
an advanced harness system that helps
ensure maximum operator comfort
and ease of operation.
nThe shoulder harness is filled with
soft padding for reduced operator
fatigue.
nThe simplified adjustment system
makes it easy to match the harness
to every body size and type. See
figure 10.
The adjusting strap lets the user
determine how far apart the
upper harness loops are
positioned. Easy to
customize for maximum
comfort.
Adjustment Holes
Adjusting Strap
Comfortable
Back Pad
Quick-disconnect
Spring Hook
Pull on the loops to
quickly tighten the har-
ness straps
Quick-adjust
Buckle
To tighten straps… To loosen straps…
Pull strap
loops down
Quick-adjust
Buckle
Pull the
quick-
adjust
buckles
up…
…and
pull the
straps
down.
Figure 10
11

USING THE BLOWER
nUse low throttle settings when
clearing lightweight materials from
around lawns or shrubbery.
nUse medium to higher throttle set-
tings to move grass or leaves from
parking lots or walkways.
nUse full throttle when moving heavy
loads such as dirt or snow.
IMPORTANT!
Blower noise increases at higher
throttle settings! Always use the low-
est throttle setting required to get the
job done!
THINK SAFETY!
OPERATING TIPS
In the hands of an experienced opera-
tor, the EB501 can efficiently move a
wide variety of debris ranging from
grass clippings to gravel. As a general
rule, operate your EB501 at the lowest
throttle setting required to get the job
done:
Never operate
the blower if any
component parts are
damaged, loose, or
missing!
48011B
Wear a dust mask to reduce the risk
of inhalation injuries.
Wear close-fitting clothing to protect
your legs and arms, and Do not wear
clothing or jewelry that could get caught
in machinery! Secure hair so that it is
above shoulder length!
Always be aware of the strength
and direction of the blower
discharge stream! Never direct the
blower discharge stream toward
people or animals!
Never operate the blower when
visibility is poor.
Wear hearing protection
when operating the blower.
Wear eye protection that meets ANSI
Z87.1 such as a face shield or goggles while
operating this machine!
Figure 11
12

48013
EVERY 10 HOURS
(more frequently in dusty conditions)
1. Remove the air cleaner cover by
gently lifting the cover latch. See
figure 12.
2. Inspect the filter. If the element is
damaged or distorted, replace it
with a new one.
IMPORTANT!
The EB501 uses a special high capac-
ity dry-type air lter element. The lter
should not be cleaned with a liquid
cleaner and must NEVER be oiled!
3. Tap filter gently on a hard surface
to disloge debris from element or
use compressed air to blow debris
from the air filter element.
IMPORTANT!
Direct the air stream at the inside face
of the lter only!
4. Wash the filter cover with soap and
water and blow dry.
5. Install the filter element and cover
in the reverse order of removal.
CAUTION!
Never operate the blower if the air
cleaner assembly is damaged or
missing!
ROUTINE MAINTENANCE
WARNING!
Before performing any mainte-
nance on this blower, stop the
engine and disconnect the spark
plug wire!
Daily Maintenance
n Remove dirt and debris from the
blower exterior.
n Inspect the engine, tank, and hoses
for possible fuel leaks, and repair as
necessary.
n Inspect the entire blower for loose,
damaged, or missing components,
and repair as necessary.
n Inspect the engine cooling fins for
accumulations of dirt or debris, and
clean as necessary.
CAUTION!
Dirty or damaged cooling system
components may allow the engine
to overheat, possibly causing seri-
ous engine damage!
Operating the blower with loose,
missing, or damaged components
could allow the engine to over-
speed, possibly causing serious
engine damage!
Snap the cover up from the
bottom to remove.
ElementCover
Remove the Element
Cover Latch
IMPORTANT!
Maintenance, replacement or repair of
emission control devices and sys-
tems may be performed by any repair
establishment or individual. However,
warranty repairs must be performed
by a dealer or service center autho-
rized by Shindaiwa Corporation The
use of parts that are not equivalent in
performance and durability to autho-
rized parts may impair the effective-
ness of the emission control system
and may have a bearing on the
outcome of a warranty claim.
Figure 12
13

48015
48017
EVERY 10/15 HOURS EVERY 50 HOURS
n INSPECTION Inspect the entire
blower and tubes for damage,
including loose or missing compo-
nents, and repair as necessary.
n SPARK PLUG Replace the spark
plug with a Champion CJ8 or
equivalent, gapped to 0.024 inch
(0.6mm).
(more frequently if reduced
performance is noted)
CAUTION!
Never allow dirt or debris to enter
the cylinder bore! Before removing
the spark plug, thoroughly clean
the spark plug and cylinder head
area!
Allow the engine to cool before
servicing the spark plug! Cylinder
threads can be damaged by tight-
ening or loosening the spark plug
while the engine is hot!
FUEL FILTER Use a bent piece of
wire to extract the fuel filter from in-
side the fuel tank, and then remove
and replace with a new element. See
figure 14.
CAUTION!
Do not nick or perforate fuel tube
with wire hook!
Before reinstalling the filter, inspect
the condition of the fuel line. If
damage or deterioration are noted,
the blower should be removed from
service until it can be inspected by a
Shindaiwa-trained service technician.
n COOLING SYSTEM Use a wood
or plastic scraper and a soft brush
to remove dirt and debris from the
cylinder fins and crankcase.
1. Use the spark plug wrench to re-
move the spark plug (turn counter-
clockwise to remove). See figure
13.
2. Clean and adjust the spark plug
gap to 0.024” (0.6mm). Replace any
damaged or visibly worn plug with a
Champion CJ8 or equivalent. See
figure 13.
3. Install the spark plug finger-tight
in the cylinder head, then tighten it
firmly with the spark plug wrench.
Avoid overtightening.
48014
0.024" (0.6mm) gap Champion CJ8
Spark Plug
Fuel Filter
Fuel Tank
Wire
Hook
to remove
Figure 14
Figure 14
14

48016D
48018
Remove the Engine Cover
Engine Cover
First, remove the
spark plug
Engine
Cover
Remove four Allen-
head capscrews
Muffler Body
Mounting
Screws
Gasket
Exhaust
Tube
Arrester
Screen
Tail Cap
135-HOUR MAINTENANCE
Every 135 hours of operation,
remove and clean the muffler.
WARNING!
Never operate the machine with
a damaged or missing mufer
or spark arrester! Operating with
missing or damaged exhaust com-
ponents is a re hazard and could
also damage your hearing.
Figure 15
Figure 16
5. Use a plastic scraper or wire brush to
remove carbon deposits from the arrester
screen, exhaust tube and tail cap.
6. Inspect the screen carefully, and replace
any screen that has been perforated, dis-
torted, or is otherwise unserviceable.
Remove the Muffler.
1. Remove the spark plug.
2 Use the 4mm Allen wrench to remove
the four engine cover screws , and
then slide the cover from the engine
taking care not to misplace the cyl-
inder-to-cover insulating gasket. See
figure 15.
3. Pry the muffler screw retaining
tabs away from the screw heads and
remove the two 6 mm muffler screws.
Remove the 5 mm lower muffler
screw, then remove the muffler assem-
bly from the engine. See figure 16.
Remove the Spark Arrester.
4. Use the screwdriver to remove the
three exhaust tube mounting screws,
and then remove the tail cap, exhaust
tube, gasket, and arrester screen. See
figure 16.
7. Gently tap the muffler on a wood surface
to dislodge any loose carbon.
8. Inspect the cylinder exhaust port for
carbon buildup.
IMPORTANT!
If you note excessive carbon buildup, con-
sult your servicing dealer.
9. Reassemble the muffler in the reverse
order of disassembly.
IMPORTANT!
Reset the muffler screw retaining tabs to
prevent the muffler screws from loosening.
5 mm
Lower
Screw
Muffler Screw
Retaining Tab
6 mm
Muffler
Screws
15

STORAGE (30 days or longer)
n CLEANING Thoroughly clean the
blower exterior.
n INSPECTION Inspect the entire
blower and tubes for damage,
including loose or missing compo-
nents, and repair as necessary.
n FUEL Drain the fuel tank, and then
clear any remaining fuel from the
carburetor and lines by running the
blower until it stops from lack of fuel.
CAUTION!
Never store this product with
any fuel remaining in the tank,
fuel lines, or carburetor! Your
Shindaiwa warranty does not in-
clude coverage for damage caused
by “stale” or contaminated fuels!
n LUBRICATION Remove the spark
plug, and then pour approximately
1/4-oz of 2-cycle oil into the cylinder
through the spark plug hole. Before
reinstalling the spark plug, pull the
recoil starter gently 2–3 times to
distribute the oil over the cylinder
walls.
n AIR CLEANER Remove, clean,
and reinstall the filter element as
described under “daily mainte-
nance.”
n STORAGE Store the blower in a
clean, dry, dust-free environment.
16

TROUBLESHOOTING GUIDE
ENGINE DOES NOT START
Does the engine
crank?
Faulty recoil starter.
Fluid in the crankcase.
Internal damage.
NO
Good
compression?
Loose spark plug.
Excess wear on
cylinder, piston, rings.
Tighten and re-test.
NO
YES
Does the tank
contain fresh
fuel of the
proper grade?
Fuel/mixture incorrect,
stale, contaminated.
NO
YES
Is fuel filling the
fuel primer bulb
during priming
operations?
Check for clogged fuel
filter and/or vent.
Clean as required;
re-start.
NO
Is there spark at
the spark plug
wire terminal?
Faulty ignition ground.
NO
YES
YES
Check the
spark plug
If the plug is wet, excess
fuel may be in the
cylinder.
The plug may be fouled
or improperly gapped.
The plug may be
damaged internally or
of the wrong size.
Crank the engine with the
plug removed, replace the
plug, and re-start.
Clean and re-gap the plug to
0.24 inch (0.6 mm); re-start.
Replace the plug with a
Champion CJ8.
YES
What To Check Possible Cause Remedy
Refill with fresh fuel of the correct
mixture (gasoline and ISO EGD
or JASO FC class 2-cycle Engine Oil).
Consult with an authorized
servicing dealer.
Consult with an authorized
servicing dealer.
Consult with an authorized
servicing dealer.
17

LOW POWER OUTPUT
TROUBLESHOOTING GUIDE (continued)
What To Check Remedy
Possible Cause
Operator is overworking
the machine.
Improper fuel/oil ratio.
Fallen leaves or dust on
the intake cover.
Fan, fan cover, or cylinder
fins are dirty or damaged.
Carbon deposits in the
muffler.
Carbon deposits in the
combustion chamber
and/or exhaust port.
Missing or damaged
blower tubes.
Use lower throttle setting.
Clean the intake cover.
Clean, repair or replace as
necessary.
Decarbonize muffler.(See 135
hr. maint. page 15).
Consult with an authorized
servicing dealer.
Replace missing or damaged
blower tubes.
Engine is rough
at all speeds. May
also have black
smoke and/or
unburned fuel at
the exhaust.
Clogged air cleaner
element.
Loose or damaged
spark plug.
Air leakage or
clogged fuel line.
Water in the fuel.
Piston seizure.
Faulty carburetor
and/or diaphragm.
Clean or replace air cleaner
element.
Tighten or replace.
Repair or replace filter and/
or fuel line.
Drain the fuel system, replace
the fuel.
Consult with an authorized
servicing dealer.
Is the engine over-
heating?
Refill with fresh fuel of the cor-
rect mixture (gasoline and ISO
EGD or JASO FC class 2-cycle
Engine Oil, 50:1 ratio.
18

19
ADDITIONAL PROBLEMS
What To Check Possible Cause Remedy
Poor
acceleration.
Clogged air cleaner
element.
Spark arrester is
clogged.
Clogged fuel filter.
Carburetor mixture
too lean.
Idle speed set too low.
Leaking or damaged
blower housing or tube
assembly.
Engine is
knocking.
Overheating condition.
Improper fuel.
Carbon deposits in
combustion chamber
and/or exhaust port.
Idle engine until cool; find
reason for overheat.
Check fuel octane rating.
Check for presence of
alcohol in fuel. Refuel as
necessary.
Consult with an authorized
servicing dealer.
Clean the element.
Clean the Spark arrester.
(page 15).
Replace fuel filter.
Consult with an authorized
servicing dealer.
Set to 2500-3000 RPM.
Repair or replace components
as required.
Egine difficult
to shut off.
Debris is tangled in
blower impeller blades.
Overheated engine.
Throttle cable is
incorrectly adjusted.
Overheating due to
incorrect spark plug.
Consult with an authorized
servicing dealer.
Idle engine to cool.
Choke engine to stop.
Adjust thottle cable.
Replace spark plug with
Champion CJ8.
TROUBLESHOOTING GUIDE (continued)