Honda igx390, igx270 Owner's Manual
INTRODUCTION
The engine exhaust from this product
contains chemicals known to the State of
California to cause cancer, birth defects or
other reproductive harm.
INTRODUCTION.................... 1
SAFETY MESSAGES.............. 1
SAFETY INFORMATION ......... 2
SAFETY LABEL LOCATION..... 2
COMPONENT & CONTROL
LOCATIONS ......................... 3
FEATURES ........................... 4
BEFORE OPERATION
CHECKS .............................. 5
OPERATION ......................... 5
SAFE OPERATING
PRECAUTIONS................... 5
STARTING THE ENGINE...... 5
STOPPING THE ENGINE ...... 6
SERVICING YOUR ENGINE ..... 7
THE IMPORTANCE OF
MAINTENANCE.................. 7
MAINTENANCE SAFETY ..... 7
SAFETY PRECAUTIONS ...... 7
MAINTENANCE
SCHEDULE ........................ 7
REFUELING........................ 8
ENGINE OIL ....................... 9
Recommended Oil............ 9
Oil Level Check ............... 9
Oil Change...................... 9
AIR CLEANER .................. 10
SEDIMENT CUP ............... 11
SPARK PLUG ................... 12
SPARK ARRESTER ........... 12
FUSE .............................. 13
HELPFUL TIPS &
SUGGESTIONS....................13
STORING YOUR ENGINE....13
TRANSPORTING ...............14
TAKING CARE OF
UNEXPECTED PROBLEMS.....15
TECHNICAL INFORMATION
...16
SERIAL NUMBER
LOCATION.......................16
BATTERY CONNECTIONS
FOR ELECTRIC STARTER...16
CARBURETOR
MODIFICATIONS FOR
HIGH ALTITUDE
OPERATION ..................... 17
EMISSION CONTROL
SYSTEM INFORMATION....17
AIR INDEX .......................18
SPECIFICATIONS..............18
TUNEUP SPECIFICATIONS...19
QUICK REFERENCE
INFORMATION .................19
WIRING DIAGRAMS..........19
CONSUMER INFORMATION
...20
WARRANTY AND
DISTRIBUTOR/DEALER
LOCATOR INFORMATION...20
CUSTOMER SERVICE
INFORMATION .................20
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Thank you for purchasing a Honda engine. We want to help you to
get the best results from your new engine and to operate it safely.
This manual contains information on how to do that; please read it
carefully before operating the engine. If a problem should arise, or
if you have any questions about your engine, consult an authorized
Honda servicing dealer.
All information in this publication is based on the latest product
information available at the time of printing. Honda Motor Co., Ltd.
reserves the right to make changes at any time without notice and
without incurring any obligation. No part of this publication may be
reproduced without written permission.
This manual should be considered a permanent part of the engine
and should remain with the engine if resold.
Review the instructions provided with the equipment powered by
this engine for any additional information regarding engine startup,
shutdown, operation, adjustments or any special maintenance
instructions.
United States, Puerto Rico, and U.S. Virgin Islands:
We suggest you read the warranty policy to fully understand its
coverage and your responsibilities of ownership. The warranty
policy is a separate document that should have been given to you
by your dealer.
OWNER’S MANUAL
MANUEL DE L’UTILISATEUR
MANUAL DEL PROPIETARIO
iGX270∙iGX390
ENGLISHFRANÇAISESPAÑOL
SAFETY MESSAGES
Your safety and the safety of others are very important. We have
provided important safety messages in this manual and on the
engine. Please read these messages carefully.
A safety message alerts you to potential hazards that could hurt
you or others. Each safety message is preceded by a safety alert
symbol and one of three words, DANGER, WARNING, or
CAUTION.
These signal words mean:
Each message tells you what the hazard is, what can happen, and
what you can do to avoid or reduce injury.
DAMAGE PREVENTION MESSAGES
You will also see other important messages that are preceded by
the word NOTICE.
This word means:
The purpose of these messages is to help prevent damage to your
engine, other property, or the environment.
2014 Honda Motor Co., Ltd. –All Rights Reserved
©
37Z8R803
00X37-Z8R-8030
Your engine or other property can be damaged if you
don’t follow instructions.
You WILL be KILLED or SERIOUSLY
HURT if you don’t follow instructions.
You CAN be KILLED or SERIOUSLY
HURT if you don’t follow instructions.
You CAN be HURT if you don’t follow
instructions.
California Proposition 65
This product contains or emits
chemicals known to the state of
California to cause cancer, birth defects
or other reproductive harm
CONTENTS
iGX270·iGX390
ENGLISH 1
SAFETY INFORMATION
WARNING LABEL
MUFFLER CAUTION LABEL
WARNING LABEL
• Understand the operation of all controls and learn how to stop
the engine quickly in case of emergency. Make sure the operator
receives adequate instruction before operating the equipment.
• Do not allow children to operate the engine. Keep children and
pets away from the area of operation.
• Your engine’s exhaust contains poisonous carbon monoxide.
Do not run the engine without adequate ventilation, and never
run the engine indoors.
• The engine and exhaust become very hot during operation.
Keep the engine at least 1 meter (3 feet) away from buildings and
other equipment during operation. Keep flammable materials
away, and do not place anything on the engine while it is
running.
SAFETY LABEL LOCATION
WARNING LABEL
(STANDARD TYPES/
LOW PROFILE TYPES*)
For EU Except EU
attached to
product
supplied
with product
supplied
with product
attached to
product
These labels warn you of potential hazards that can cause serious
injury. Read them carefully.
If a label comes off or becomes hard to read, contact your servicing
dealer for replacement.
STANDARD TYPES
MUFFLER CAUTION LABEL
(STANDARD TYPES)
Gasoline is highly flammable and explosive.
Stop the engine and let cool before refueling.
The engine emits toxic poisonous carbon
monoxide gas. Do not run in an enclosed area.
supplied
with product
For EU Except EU
not
included
supplied
with product
supplied
with product
supplied
with product
supplied
with product
attached to
product
supplied
with product
LOW PROFILE TYPES
*These labels are packed in the box.
2 ENGLISH
Read Owner’s Manual before operation.
Hot muffler can burn you.
Stay away if engine has been running.
COMPONENT & CONTROL LOCATIONS
ECM
MUFFLER
FUEL TANK
FUEL TANK CAP
AIR CLEANER
RECOIL STARTER
(applicable types)
STARTER GRIP
(applicable types)
ELECTRIC STARTER
(applicable types)
CHOKE LEVER
OIL FILLER CAP
FUSE
(applicable types)
OIL DRAIN PLUG
CONTROL BOX (ELECTRIC STARTER TYPES)
(Indicator type)
FUEL VALVE LEVER
OIL ALERT
INDICATOR
ENGINE
SWITCH
ENGINE SWITCH
(Hour meter type)
OIL ALERT INDICATOR
HOUR METER
CONTROL BOX (RECOIL STARTER TYPES)
ENGINE SWITCH
SEDIMENT CUP
AIR CLEANER
ECM
CHOKE LEVER
RECOIL STARTER
(applicable types)
ELECTRIC STARTER
(applicable types)
STARTER GRIP
(applicable types)
OIL FILLER CAP
FUSE
(applicable types)
OIL DRAIN PLUGCONTROL BOX
STANDARD TYPES
LOW PROFILE TYPES
ENGLISH 3
FEATURES
CONTROL BOX
(Indicator type)
OIL ALERT
INDICATOR
CONTROL BOX
(Hour meter type)
OIL ALERT
INDICATOR
ECM
CHOKE LEVER
ECM
CHOKE LEVER
AUTO CHOKE AND THROTTLE CONTROL SYSTEM
OIL ALERT® SYSTEM
‘‘Oil Alert is a registered trademark in the United States’’
The Oil Alert system is designed to prevent engine damage caused
by an insufficient amount of oil in the crankcase. Before the oil
level in the crankcase can fall below a safe limit, the Oil Alert
system will either shut off the engine or issue a warning.
Refer to the instructions provided by the equipment manufacturer.
The Oil Alert indicator behavior when a drop in the oil level is
detected while the engine is running.
Oil Alert Indicator
Control box
type
Indicator
type
Hour meter
type
When the engine
When a drop
in the oil level
is detected
automatically
shuts down (with
the engine switch
in the ON position)
Blinks Goes off Goes off
Comes on Comes on Goes off
When the
engine switch
is turned to the
OFF position
If the engine stops and/or will not restart, check the oil level (see
page 9) before troubleshooting in other areas.
The ECM of this engine controls the choke valve and throttle valve
automatically.
When starting and warming up the engine, you do not need to
operate the choke lever unless the engine is hard to start using the
normal starting procedure.
STANDARD TYPES
LOW PROFILE TYPES
If you continue to operate the engine after the Oil Alert system has
been activated, you can damage the engine.
4 ENGLISH
BEFORE OPERATION CHECKS
FUEL VALVE LEVER
ON
ON
START
ENGINE SWITCH
OPERATION
IS YOUR ENGINE READY TO GO?
For your safety, to ensure compliance with environmental
regulations, and to maximize the service life of your equipment, it is
very important to take a few moments before you operate the
engine to check its condition. Be sure to take care of any problem
you find, or have your servicing dealer correct it, before you
operate the engine.
Improperly maintaining this engine, or failure to
correct a problem before operation, can cause a
malfunction in which you can be seriously hurt or
killed.
Always perform a pre-operation inspection before
each operation, and correct any problem.
Before beginning your pre-operation checks, be sure the engine is
level and the engine switch is in the OFF position.
Always check the following items before you start the engine:
Check the General Condition of the Engine
1. Look around and underneath the engine for signs of oil or
gasoline leaks.
SAFE OPERATING PRECAUTIONS
Before operating the engine for the first time, please review the
SAFETY INFORMATION section on page 2 and the BEFORE
OPERATION CHECKS on this page.
For your safety, do not operate the engine in an enclosed area such
as a garage. Your engine’s exhaust contains poisonous carbon
monoxide gas that can collect rapidly in an enclosed area and
cause illness or death.
Exhaust contains poisonous carbon monoxide gas
that can build up to dangerous levels in closed areas.
Breathing carbon monoxide can cause
unconsciousness or death.
Never run the engine in a closed, or even partly closed
area where people may be present.
Review the instructions provided with the equipment powered by
this engine for any safety precautions that should be observed with
engine startup, shutdown, or operation.
STARTING THE ENGINE
WITH ELECTRIC STARTER:
2. Remove any excessive dirt or debris, especially around the
muffler and recoil starter.
3. Look for signs of damage.
4. Check that all shields and covers are in place, and all nuts,
bolts, and screws are tightened.
Check the Engine
1. Check the fuel level (see page 8). Starting with a full tank will
help to eliminate or reduce operating interruptions for refueling.
2. Check the engine oil level (see page 9). Running the engine with
a low oil level can cause engine damage.
If the oil level in the crankcase falls below a safe limit, the Oil
Alert system will either shut off the engine or issue a warning.
However, to avoid the inconvenience of an unexpected
shutdown, always check the engine oil level before startup.
3. Check the air filter element (see page 10). A dirty air filter
element will restrict air flow to the carburetor, reducing engine
performance.
4. Check the equipment powered by this engine.
1. Move the fuel valve lever to
the ON position.
2. Turn the engine switch to the
START position, and hold it
there until the engine starts.
Some engine applications do
not include the
engine-mounted control box
with engine switch shown
here. Refer to the instructions
provided by the equipment
manufacturer.
If the engine fails to start
within 5 seconds, release the
engine switch, and wait at
least 10 seconds before
operating the starter again.
Using the electric starter for
more than 5 seconds at a
time will overheat the starter
motor and can damage it.
Review the instructions provided with the equipment powered
by this engine for any precautions and procedures that should
be followed before engine startup.
When the engine starts,
release the engine switch,
allowing it to return to the ON
position.
ENGLISH 5
WITH RECOIL STARTER:
ON
FUEL VALVE LEVER
ENGINE SWITCH
ON
ELECTRIC STARTER TYPES
RECOIL STARTER TYPES
ENGINE SWITCH
ON
STARTER GRIP
Direction to pull
STARTER GRIP
Direction to pull
ENGINE SWITCH
ELECTRIC STARTER TYPES
RECOIL STARTER TYPES
ENGINE SWITCH
OFF
OFF
FUEL VALVE LEVER
OFF
1. Move the fuel valve lever to the ON position.
LOW PROFILE TYPES
2. Turn the engine switch to the ON position.
Do not allow the starter grip to snap back against the engine.
Return it gently to prevent damage to the starter.
STOPPING THE ENGINE
1. Turn the engine switch to the OFF position.
3. Pull the starter grip lightly until you feel resistance, then pull
briskly in the direction of the arrow as shown below. Return the
starter grip gently.
STANDARD TYPES
6 ENGLISH
2. Move the fuel valve lever to the OFF position.
SERVICING YOUR ENGINE
MAINTENANCE SCHEDULE
THE IMPORTANCE OF MAINTENANCE
Good maintenance is essential for safe, economical, and
trouble-free operation. It will also help reduce pollution.
Improper maintenance, or failure to correct a problem
before operation, can cause a malfunction in which
you can be seriously hurt or killed.
Always follow the inspection and maintenance
recommendations and schedules in this owner’s
manual.
To help you properly care for your engine, the following pages
include a maintenance schedule, routine inspection procedures, and
simple maintenance procedures using basic hand tools. Other
service tasks that are more difficult, or require special tools, are
best handled by professionals and are normally performed by a
Honda technician or other qualified mechanic.
The maintenance schedule applies to normal operating conditions.
If you operate your engine under severe conditions, such as
sustained high-load or high-temperature operation, or use in
unusually wet or dusty conditions, consult your Honda servicing
dealer for recommendations applicable to your individual needs and
use.
Maintenance, replacement, or repair of the emission control
devices and systems may be performed by any engine repair
establishment or individual, using parts that are ‘‘certified’’ to EPA
standards.
MAINTENANCE SAFETY
Some of the most important safety precautions follow. However,
we cannot warn you of every conceivable hazard that can arise in
performing maintenance. Only you can decide whether or not you
should perform a given task.
REGULAR SERVICE PERIOD (1)
Perform at every indicated
month or operating hour
interval, whichever comes
first.
ITEM
Engine oil Check level o 9
Change o o 9
Air cleaner Check o 10
Clean o (2) o (2) 10
Replace o ** 10
Spark plug Check-adjust o 12
Replace o
Spark arrester
(applicable types)
Idle speed Check-adjust o (3)
Valve clearance Check-adjust o (3)
Sediment cup Clean o 11
Combustion
chamber
Fuel tank &
filter
Fuel tube Check Every 2 years
Clean o (4) 12
Clean After every 1,000 Hrs. (3)
Clean o (3)
Each
First
Use
Every 3
Month
Months
or
20 Hrs.
50 Hrs.
(Replace if necessary) (3)
or
Every 6
Months
or
100 Hrs.
Every
Year
or
300 Hrs.
Refer
manual
manual
manual
manual
manual
** Replace paper element type only.
(1) For commercial use, log hours of operation to determine
proper maintenance intervals.
(2) Service more frequently when used in dusty areas.
(3) These items should be serviced by your servicing dealer,
unless you have the proper tools and are mechanically
proficient. Refer to the Honda shop manual for service
procedures.
to
Page
Shop
Shop
Shop
Shop
Shop
Failure to properly follow maintenance instructions
and precautions can cause you to be seriously hurt or
killed.
Always follow the procedures and precautions in this
owner’s manual.
SAFETY PRECAUTIONS
• Make sure the engine is off before you begin any maintenance or
repairs. To prevent accidental startup, disconnect the spark plug
cap. This will eliminate several potential hazards:
– Carbon monoxide poisoning from engine exhaust.
Be sure there is adequate ventilation whenever you operate the
engine.
– Burns from hot parts.
Let the engine and exhaust system cool before touching.
– Injury from moving parts.
Do not run the engine unless instructed to do so.
• Read the instructions before you begin, and make sure you have
the tools and skills required.
• To reduce the possibility of fire or explosion, be careful when
working around gasoline. Use only a non-flammable solvent, not
gasoline, to clean parts. Keep cigarettes, sparks and flames away
from all fuel related parts.
Remember that an authorized Honda servicing dealer knows your
engine best and is fully equipped to maintain and repair it.
To ensure the best quality and reliability, use only new Honda
Genuine parts or their equivalents for repair and replacement.
ENGLISH 7
(4) In Europe and other countries where the machinery directive
2006/42/EC is enforced, this service should be done by your
servicing dealer.
Failure to follow this maintenance schedule could result in
non-warrantable failures.
REFUELING (LOW PROFILE TYPES)
FUEL TANK CAP
MAXIMUM FUEL LEVEL
CHAIN
Follow the equipment manufacturers recommendation for refueling.
REFUELING (STANDARD TYPES)
Recommended Fuel
Unleaded gasoline
U.S. Pump octane rating 86 or higher
Except U.S. Research octane rating 91 or higher
Pump octane rating 86 or higher
This engine is certified to operate on unleaded gasoline with a
pump octane rating of 86 or higher (a research octane rating of 91
or higher).
Refuel in a well ventilated area with the engine stopped. If the
engine has been running, allow it to cool first. Never refuel the
engine inside a building where gasoline fumes may reach flames or
sparks.
You may use unleaded gasoline containing no more than 10%
ethanol (E10) or 5% methanol by volume. In addition, methanol
must contain cosolvents and corrosion inhibitors. Use of fuels with
content of ethanol or methanol greater than shown above may
cause starting and/or performance problems. It may also damage
metal, rubber, and plastic parts of the fuel system. Engine damage
or performance problems that result from using a fuel with
percentages of ethanol or methanol greater than shown above are
not covered under the Warranty.
2. Add fuel to the maximum fuel level of the fuel tank. Do not
overfill. Wipe up spilled fuel before starting the engine.
If your equipment will be used on an infrequent or intermittent
basis, please refer to the fuel section of the STORING YOUR
ENGINE chapter (see page 13) for additional information regarding
fuel deterioration.
Gasoline is highly flammable and explosive, and you
can be burned or seriously injured when refueling.
• Stop the engine and keep heat, sparks, and flame
away.
• Refuel only outdoors.
• Wipe up spills immediately.
Fuel can damage paint and some types of plastic. Be careful not to
spill fuel when filling your fuel tank. Damage caused by spilled fuel
is not covered under the Distributor’s Limited Warranty.
Never use stale or contaminated gasoline or an oil/gasoline mixture.
Avoid getting dirt or water in the fuel tank.
1. With the engine stopped and on a level surface, remove the fuel
tank cap and check the fuel level. Refill the tank if the fuel level
is low.
Refuel carefully to avoid spilling fuel. Do not fill the fuel tank
completely. It may be necessary to lower the fuel level depending
on operating conditions. After refueling, tighten the fuel tank cap
back on until it clicks.
Keep gasoline away from appliance pilot lights, barbecues, electric
appliances, power tools, etc.
Spilled fuel is not only a fire hazard, it causes environmental
damage. Wipe up spills immediately.
8 ENGLISH
ENGINE OIL
AMBIENT TEMPERATURE
OIL FILLER CAP
UPPER LIMIT
OIL FILL HOLE
(bottom edge)
OIL FILLER CAP
SEALING WASHER
(Replace)
OIL DRAIN PLUG
Oil Change
Oil is a major factor affecting performance and service life.
Use 4-stroke automotive detergent oil.
Recommended Oil
Use 4-stroke motor oil that
meets or exceeds the
requirements for API
service category SJ or later
(or equivalent). Always
check the API service label
on the oil container to be
sure it includes the letters
SJ or later (or equivalent).
SAE 10W-30 is recommended for general use. Other viscosities
shown in the chart may be used when the average temperature in
your area is within the indicated range.
Oil Level Check
Check the engine oil level with the engine stopped and in a level
position.
1. Remove the oil filler cap.
2. Check the oil level. If it is below the upper limit, fill with the
recommended oil to the upper limit.
Drain the used oil when the engine is warm. Warm oil drains
quickly and completely.
1. Place a suitable container below the engine to catch the used oil,
then remove the oil filler cap, oil drain plug and sealing washer.
2. Allow the used oil to drain completely, then reinstall the oil drain
plug and a new sealing washer, and tighten the oil drain plug
securely.
Please dispose of used motor oil in a manner that is compatible
with the environment. We suggest you take used oil in a sealed
container to your local recycling center or service station for
reclamation. Do not throw it in the trash, pour it on the ground,
or pour it down a drain.
3. With the engine in a level position, fill with the recommended oil
to the upper limit (bottom edge of the oil fill hole).
Running the engine with a low oil level can cause engine
damage. This type of damage is not covered by the
Distributor’s Limited Warranty.
4. Reinstall and tighten the oil filler cap.
3. Reinstall the oil filler cap securely.
Running the engine with a low oil level can cause engine damage.
This type of damage is not covered by the Distributor’s Limited
Warranty.
The Oil Alert system will stop the engine or issue a warning before
the oil level falls below a safe limit. Refer to the instructions
provided by the equipment manufacturer.
ENGLISH 9
AIR CLEANER
NUT
AIR CLEANER
COVER
WING NUT
PAPER AIR
FILTER ELEMENT
FOAM FILTER
ELEMENT
AIR CLEANER
CASE
GASKET
Squeeze and Dry
Dip in Oil
Squeeze
Clean
Do not twist. Do not twist.
AIR CLEANER CASE
CLIP
FOAM FILTER
ELEMENT
AIR CLEANER COVER
Squeeze and Dry
Dip in Oil
Squeeze
Clean
Do not twist. Do not twist.
A dirty air cleaner will restrict air flow to the carburetor, reducing
engine performance. If you operate the engine in very dusty areas,
clean or replace the air filter more often than specified in the
MAINTENANCE SCHEDULE.
Operating the engine without an air filter, or with a damaged air
filter, will allow dirt to enter the engine, causing rapid engine wear.
This type of damage is not covered by the Distributor’s Limited
Warranty.
6. Wipe dirt from the inside of the air cleaner case and cover using
a moist rag. Be careful to prevent dirt from entering the air duct
that leads to the carburetor.
7. Place the foam filter element over the paper air filter element,
and reinstall the assembled air filter. Be sure the gasket is in
place beneath the air filter. Tighten the air filter wing nut
securely.
8. Install the air cleaner cover, and tighten the nut securely.
Inspection (low profile types)
Inspection (standard types)
Remove the air cleaner cover and inspect the filter elements.
Clean or replace dirty filter elements. Always replace damaged filter
elements.
Cleaning (standard types)
1. Remove the nut from the air
cleaner cover, and remove the
cover.
2. Remove the wing nut from the
air filter, and remove the filter.
3. Remove the foam filter element
from the paper air filter
element.
4. Inspect both air filter elements,
and replace them if they are
damaged. Always replace the
paper air filter element at the
scheduled interval (see page 7).
5. Clean the filter elements if they are to be reused.
Remove the air cleaner cover and inspect the filter element.
Visually inspect the filter element. Clean the foam filter element.
Always replace damaged filter element.
Cleaning (low profile types)
1. Unsnap the air cleaner cover clips and remove the air cleaner
cover.
2. Remove the foam filter element from the air cleaner case.
3. Inspect the foam filter element, and replace it if it is damaged.
LOW PROFILE TYPES
Paper filter element: Tap the filter element several times on a
hard surface to remove dirt, or blow compressed air [not
exceeding 207 kPa (2.1 kgf/cm
element from the inside. Never try to brush off dirt; brushing
will force dirt into the fibers.
Foam filter element: Clean in warm soapy water, rinse, and
allow to dry thoroughly. Or clean in non-flammable solvent and
allow to dry. Dip the filter element in clean engine oil, and then
squeeze out all excess oil. The engine will smoke when started
if too much oil is left in the foam.
2
, 30 psi)] through the filter
4. Clean the foam filter element if it is to be reused.
Clean in warm soapy water, rinse, and allow to dry thoroughly.
Or clean in non-flammable solvent and allow to dry.
Dip the filter element in clean engine oil, then squeeze out all
excess oil. The engine will smoke when started if too much oil
is left in the foam.
5. Wipe dirt from the inside of the air cleaner case and cover,
using a moist rag. Be careful to prevent dirt from entering the
air duct that leads to the carburetor.
6. Install the foam filter element to the air cleaner case.
10 ENGLISH
7. Install the air cleaner cover and snap the air cleaner cover clips.
SEDIMENT CUP
AIR CLEANER BASE
AIR CLEANER CASE
5 mm FLANGE
BOLTS
6 mm FLANGE BOLT
5 mm FLANGE BOLTS
6 mm FLANGE NUTS
BREATHER TUBE
FILTER
O-RING (Replace)
SEDIMENT CUP
FUEL VALVE LEVER
OFF
Cleaning
Gasoline is highly flammable and explosive, and you
can be burned or seriously injured when handling fuel.
• Stop the engine and keep heat, sparks, and flame
away.
• Handle fuel only outdoors.
• Wipe up spills immediately.
(LOW PROFILE TYPES)
1. Unsnap the air cleaner cover clips, remove the air cleaner cover,
and remove the foam filter element (see page 10).
2. Remove the four 5 mm flange bolts, one 6 mm flange bolt, and
air cleaner case.
Remove the two 6 mm flange nuts and pull out the breather
tube, then remove the air cleaner base.
LOW PROFILE TYPES
6. Reinstall the filter, new O-ring, and sediment cup as shown.
Tighten the sediment cup securely.
(LOW PROFILE TYPES)
7. Install the air cleaner base, breather tube, air cleaner case, foam
filter element, and air cleaner cover in the reverse order of
removal.
3. Move the fuel valve lever to the OFF position.
4. Remove the sediment cup, O-ring and filter.
5. Wash the sediment cup and filter in non-flammable solvent, and
dry it thoroughly.
ENGLISH 11
SPARK PLUG
SPARK PLUG
SPARK PLUG CAP
SPARK PLUG WRENCH
0.7–0.8 mm
(0.028–0.031 in)
SIDE
ELECTRODE
SEALING
WASHER
NUT
AIR CLEANER
COVER
WING NUT
SILENCER
NOSE
GASKET
AIR CLEANER
ELEMENT
5 mm SCREWS
MUFFLER
PROTECTOR
6 mm SCREW
MUFFLER
SPARK ARRESTER
5 mm SCREWS
5 mm SCREWS
SPARK ARRESTER (applicable types)
Recommended Spark Plugs: BPR6ES (NGK)
W20EPR-U (DENSO)
The recommended spark plug has the correct heat range for normal
engine operating temperatures.
An incorrect spark plug can cause engine damage.
For good performance, the spark plug must be properly gapped and
free of deposits.
1. Disconnect the spark plug cap, and remove any dirt from
around the spark plug area.
2. Remove the spark plug with a
21 mm (13/16-inch) spark plug
wrench.
In Europe and other countries where the machinery directive
2006/42/EC is enforced, this cleaning should be done by your
servicing dealer.
The spark arrester must be serviced every 6 months or 100 hours
to keep it functioning as designed.
If the engine has been running, the muffler will be hot. Allow it to
cool before servicing the spark arrester.
Spark Arrester Removal
1. Remove the nut, air cleaner cover, wing nut, air cleaner
element, silencer nose and gasket.
3. Inspect the spark plug.
Replace it if damaged or badly
fouled, if the sealing washer is
in poor condition, or if the
electrode is worn.
4. Measure the spark plug
electrode gap with a wire-type
feeler gauge. Correct the gap,
if necessary, by carefully
bending the side electrode.
The gap should be:
0.7–0.8 mm (0.028–0.031 in)
5. Install the spark plug carefully,
by hand, to avoid
cross-threading.
6. After the spark plug is seated, tighten with a 21 mm (13/16inch) spark plug wrench to compress the sealing washer.
When installing a new spark plug, tighten 1/2 turn after the
spark plug seats to compress the sealing washer.
When reinstalling the original spark plug, tighten 1/8–1/4 turn
after the spark plug seats to compress the sealing washer.
A loose spark plug can overheat and damage the engine.
Overtightening the spark plug can damage the threads in the
cylinder head.
7. Attach the spark plug cap to the spark plug.
2. Remove the four 5 mm screws and one 6 mm screw from the
muffler protector, and remove the muffler protector.
3. Remove the two 5 mm screws from the spark arrester, and
remove the spark arrester from the muffler.
12 ENGLISH
Spark Arrester Cleaning & Inspection
SCREEN
FUSE SOCKET
FUSE
(30 A)
FUSE COVER
STAY
LOCK TAB
LOCK TAB
HELPFUL TIPS & SUGGESTIONS
1. Use a brush to remove carbon
deposits from the spark
arrester screen. Be careful not
to damage the screen. Replace
the spark arrester if it has
breaks or holes.
2. Install the spark arrester to the
muffler.
3. Install the muffler protector and air cleaner in the reverse order
of disassembly.
FUSE (applicable types)
If the fuse is blown, the battery cannot be charged.
Fuse change
1. Remove the fuse socket from the stay pushing down the lock
tab.
2. Remove the fuse cover pulling up the lock tab, and pull the fuse
out.
3. Replace the fuse with a fuse of the same type and rating.
STORING YOUR ENGINE
Storage Preparation
Proper storage preparation is essential for keeping your engine
trouble-free and looking good. The following steps will help to keep
rust and corrosion from impairing your engine’s function and
appearance, and will make the engine easier to start when you use
it again.
Cleaning
If the engine has been running, allow it to cool for at least half an
hour before cleaning. Clean all exterior surfaces, touch up any
damaged paint, and coat other areas that may rust with a light film
of oil.
Using a garden hose or pressure washing equipment can force
water into the air cleaner or muffler opening. Water in the air
cleaner will soak the air filter, and water that passes through the
air filter or muffler can enter the cylinder, causing damage.
Fuel
Depending on the region where you operate your equipment, fuel
formulations may deteriorate and oxidize rapidly. Fuel deterioration
and oxidation can occur in as little as 30 days and may cause
damage to the carburetor and/or fuel system. Please check with
your servicing dealer for local storage recommendations.
Never use a fuse with different rating from that specified.
Serious damage to the electrical system or fire may result.
4. Install the fuse cover to the fuse socket.
5. Install the fuse socket to the stay.
Gasoline will oxidize and deteriorate in storage. Deteriorated
gasoline will cause hard starting, and it leaves gum deposits that
clog the fuel system. If the gasoline in your engine deteriorates
during storage, you may need to have the carburetor and other fuel
system components serviced or replaced.
The length of time that gasoline can be left in your fuel tank and
carburetor without causing functional problems will vary with such
factors as gasoline blend, your storage temperatures, and whether
the fuel tank is partially or completely filled. The air in a partially
filled fuel tank promotes fuel deterioration. Very warm storage
temperatures accelerate fuel deterioration. Fuel deterioration
problems may occur within a few months, or even less if the
gasoline was not fresh when you filled the fuel tank.
Fuel system damage or engine performance problems resulting
from neglected storage preparation are not covered under the
Distributor’s Limited Warranty.
You can extend fuel storage life by adding a gasoline stabilizer that
is formulated for that purpose, or you can avoid fuel deterioration
problems by draining the fuel tank and carburetor.
Adding a Gasoline Stabilizer to Extend Fuel Storage Life
When adding a gasoline stabilizer, fill the fuel tank with fresh
gasoline. If only partially filled, air in the tank will promote fuel
deterioration during storage. If you keep a container of gasoline for
refueling, be sure that it contains only fresh gasoline.
1. Add gasoline stabilizer following the manufacturer’s
instructions.
2. After adding a gasoline stabilizer, run the engine outdoors for
10 minutes to be sure that treated gasoline has replaced the
untreated gasoline in the carburetor.
3. Stop the engine.
ENGLISH 13
Engine Oil
FUEL VALVE LEVER
O-RING (Replace)
SEDIMENT CUP
CARBURETOR DRAIN BOLT
1. Change the engine oil (see page 9).
2. Remove the spark plug (see page 12).
3
3. Pour a teaspoon 5–10 cm
(5–10 cc) of clean engine oil into
the cylinder.
4. Pull the starter grip several times to distribute the oil in the
cylinder.
5. Reinstall the spark plug.
Storage Precautions
If your engine will be stored with gasoline in the fuel tank and
carburetor, it is important to reduce the hazard of gasoline vapor
ignition. Select a well ventilated storage area away from any
appliance that operates with a flame, such as a furnace, water
heater, or clothes dryer. Also avoid any area with a
spark-producing electric motor, or where power tools are operated.
If possible, avoid storage areas with high humidity, because that
promotes rust and corrosion.
Keep the engine level in storage. Tilting can cause fuel or oil
leakage.
6. Pull the starter rope slowly until resistance is felt. This will close
the valves so moisture cannot enter the engine cylinder. Return
the starter rope gently.
Draining the Carburetor
Gasoline is highly flammable and explosive, and you
can be burned or seriously injured when handling fuel.
• Stop the engine and keep heat, sparks, and flame
away.
• Handle fuel only outdoors.
• Wipe up spills immediately.
(LOW PROFILE TYPES)
1. Unsnap the air cleaner cover clips, remove the air cleaner cover,
and remove the foam filter element (see page 10).
2. Remove the air cleaner case and pull out the breather tube, then
remove the air cleaner base (see page 11).
3. Move the fuel valve lever to the OFF position.
4. Place an approved gasoline container below the carburetor, and
use a funnel to avoid spilling fuel.
5. Loosen the carburetor drain bolt. Remove the sediment cup and
O-ring, then move the fuel valve lever to the ON position.
With the engine and exhaust system cool, cover the engine to keep
out dust. A hot engine and exhaust system can ignite or melt some
materials. Do not use sheet plastic as a dust cover.
A nonporous cover will trap moisture around the engine, promoting
rust and corrosion.
If equipped with a battery for electric starter types, recharge the
battery once a month while the engine is in storage.
This will help to extend the service life of the battery.
Removal from Storage
Check your engine as described in the BEFORE OPERATION
CHECKS section of this manual (see page 5).
If the fuel was drained during storage preparation, fill the tank with
fresh gasoline. If you keep a container of gasoline for refueling, be
sure it contains only fresh gasoline. Gasoline oxidizes and
deteriorates over time, causing hard starting.
If the cylinder was coated with oil during storage preparation, the
engine will smoke briefly at startup. This is normal.
TRANSPORTING
If the engine has been running, allow it to cool for at least 15
minutes before loading the engine-powered equipment on the
transport vehicle. A hot engine and exhaust system can burn you
and can ignite some materials.
Turn the fuel valve lever to the OFF position.
Keep the engine level when transporting to reduce the possibility of
fuel leakage.
6. After all the fuel has drained into the container, reinstall the
sediment cup and a new O-ring. Tighten the carburetor drain
bolt and sediment cup securely.
(LOW PROFILE TYPES)
7. Install the air cleaner base, breather tube, air cleaner case, foam
filter element, and air cleaner cover in the reverse order of
removal.
14 ENGLISH
TAKING CARE OF UNEXPECTED PROBLEMS
CONTROL BOX
(Hour meter type)
CONTROL BOX
(Indicator type)
OIL ALERT
INDICATOR
OIL ALERT
INDICATOR
To perform the oil alert indicator check, the engine must be
connected to a battery and the engine switch must be in the ON
position.
ENGINE WILL NOT START
Possible Cause Correction
Fuse burnt out. Replace fuse (p. 13).
After replacing fuse, turn the engine
switch to the ON position once again.
Fuel, engine oil, spark
plug, etc.
Engine oil level low. Fill with the recommended oil to the
ECM, sensors, etc. Take engine to your servicing dealer,
Battery discharged. Recharge battery.
Choke closed. Move choke lever to OPEN position
Engine switch OFF. Turn engine switch to ON position.
Out of fuel. Refuel (p. 8).
Bad fuel; engine stored
without treating or
draining gasoline, or
refueled with bad
gasoline.
Spark plug faulty, fouled,
or improperly gapped.
Spark plug wet with fuel
(flooded engine).
Fuel filter restricted,
carburetor malfunction,
ignition malfunction,
valves stuck, etc.
Check the BEFORE OPERATION
CHECKS (p. 5).
proper level (p. 9).
or refer to shop manual.
unless the engine is warm.
Drain fuel tank and carburetor (p. 14).
Refuel with fresh gasoline (p. 8).
Gap or replace spark plug (p. 12).
Dry and reinstall spark plug.
Take engine to your servicing dealer,
or refer to shop manual.
ENGINE LACKS POWER
Possible Cause Correction
Filter element(s)
restricted.
Bad fuel; engine stored
without treating or
Clean or replace filter element(s)
(p. 10).
Drain fuel tank and carburetor (p. 14).
Refuel with fresh gasoline (p. 8).
draining gasoline, or
refueled with bad
gasoline.
Fuel filter restricted,
carburetor malfunction,
Take engine to your servicing dealer,
or refer to shop manual.
ignition malfunction,
valves stuck, etc.
ENGLISH 15
TECHNICAL INFORMATION
SERIAL NUMBER &
ENGINE TYPE LOCATION
SERIAL NUMBER LOCATION
Record the engine serial number, engine type, and date of purchase
in the spaces below. You will need this information when ordering
parts and when making technical or warranty inquiries.
STANDARD TYPES
LOW PROFILE TYPES
SERIAL NUMBER &
ENGINE TYPE LOCATION
POSITIVE (+)
BATTERY CABLE
NEGATIVE (–) BATTERY CABLE
BATTERY CONNECTIONS FOR ELECTRIC STARTER
(applicable types)
Recommended Battery
iGX270/iGX390 12 V–24 Ah
Be careful not to connect the battery in reverse polarity, as this will
short circuit the battery charging system. Always connect the
positive (+) battery cable to the battery terminal before connecting
the negative (–) battery cable, so your tools cannot cause a short
circuit if they touch a grounded part while tightening the positive
(+) battery cable end.
A battery can explode if you do not follow the correct
procedure, seriously injuring anyone nearby.
Keep all sparks, open flames, and smoking materials
away from the battery.
WARNING: Battery posts, terminals, and related accessories
contain lead and lead compounds. Wash hands after handling.
1. Connect the positive (+) battery cable to the starter solenoid
terminal as shown.
Engine serial number: __ __ __ __ — __ __ __ __ __ __ __
Engine type: ___ ___ ___ ___
Date Purchased: ______ / ______ / ______
2. Connect the negative (–) battery cable to an engine mounting
bolt, frame bolt, or other good engine ground connection.
3. Connect the positive (+) battery cable to the battery positive
(+) terminal as shown.
4. Connect the negative (–) battery cable to the battery negative
(–) terminal as shown.
5. Coat the terminals and cable ends with grease.
16 ENGLISH
CARBURETOR MODIFICATIONS FOR HIGH ALTITUDE OPERATION
EMISSION CONTROL SYSTEM INFORMATION
At high altitude, the standard carburetor air-fuel mixture will be too
rich. Performance will decrease, and fuel consumption will
increase. A very rich mixture will also foul the spark plug and cause
hard starting. Operation at an altitude that differs from that at
which this engine was certified, for extended periods of time, may
increase emissions.
High altitude performance can be improved by specific
modifications to the carburetor. If you always operate your engine
at altitudes above 1,500 meters (5,000 feet), have your servicing
dealer perform this carburetor modification. This engine, when
operated at high altitude with the carburetor modifications for high
altitude use, will meet each emission standard throughout its useful
life.
Even with carburetor modification, engine horsepower will
decrease about 3.5% for each 300 meter (1,000 foot) increase in
altitude. The effect of altitude on horsepower will be greater than
this if no carburetor modification is made.
When the carburetor has been modified for high altitude operation,
the air-fuel mixture will be too lean for low altitude use. Operation
at altitudes below 1,500 meters (5,000 feet) with a modified
carburetor may cause the engine to overheat and result in serious
engine damage. For use at low altitudes, have your servicing dealer
return the carburetor to original factory specifications.
Source of Emissions
The combustion process produces carbon monoxide, oxides of
nitrogen, and hydrocarbons. Control of hydrocarbons and oxides of
nitrogen is very important because, under certain conditions, they
react to form photochemical smog when subjected to sunlight.
Carbon monoxide does not react in the same way, but it is toxic.
Honda utilizes appropriate air/fuel ratios and other emissions
control systems to reduce the emissions of carbon monoxide,
oxides of nitrogen, and hydrocarbons.
Additionally, Honda fuel systems utilize components and control
technologies to reduce evaporative emissions.
The U.S. and California Clean Air Acts, and Canadian Environment
Protection Act
U.S. EPA, California and Canadian regulations require all
manufacturers to furnish written instructions describing the
operation and maintenance of emission control systems.
The following instructions and procedures must be followed in
order to keep the emissions from your Honda engine within the
emission standards.
Tampering and Altering
Tampering is a violation of Federal and California law.
Tampering with or altering the emission control system may
increase emissions beyond the legal limit. Among those acts that
constitute tampering are:
• Removal or alteration of any part of the intake, fuel, or exhaust
systems.
• Altering or defeating the governor linkage or speed-adjusting
mechanism to cause the engine to operate outside its design
parameters.
Problems That May Affect Emissions
If you are aware of any of the following symptoms, have your
engine inspected and repaired by your servicing dealer.
• Hard starting or stalling after starting.
• Rough idle.
• Misfiring or backfiring under load.
• Afterburning (backfiring).
• Black exhaust smoke or high fuel consumption.
Replacement Parts
The emission control systems on your new Honda engine were
designed, built, and certified to conform with U.S. EPA, California
(models certified for sale in California), and Canadian emission
regulations. We recommend the use of Honda Genuine parts
whenever you have maintenance done. These original-design
replacement parts are manufactured to the same standards as the
original parts, so you can be confident of their performance. The
use of replacement parts that are not of the original design and
quality may impair the effectiveness of your emission control
system.
A manufacturer of an aftermarket part assumes the responsibility
that the part will not adversely affect emission performance. The
manufacturer or rebuilder of the part must certify that use of the
part will not result in a failure of the engine to comply with
emission regulations.
ENGLISH 17
Maintenance
Follow the maintenance schedule on page 7. Remember that this
schedule is based on the assumption that your machine will be
used for its designed purpose. Sustained high-load or
high-temperature operation, or use in unusually wet or dusty
conditions, will require more frequent service.
AIR INDEX
An Air Index Information label is applied to engines certified to an
emission durability time period in accordance with the requirements
of the California Air Resources Board.
The bar graph is intended to provide you, our customer, the ability
to compare the emissions performance of available engines. The
lower the Air Index, the less pollution.
The durability description is intended to provide you with
information relating to the engine’s emission durability period.
The descriptive term indicates the useful life period for the engine’s
emission control system. See your Emission Control System
Warranty for additional information.
Descriptive Term Applicable to Emissions Durability Period
Moderate 50 hours (0–80 cc, inclusive)
125 hours (greater than 80 cc)
Intermediate 125 hours (0–80 cc, inclusive)
250 hours (greater than 80 cc)
Extended 300 hours (0–80 cc, inclusive)
500 hours (greater than 80 cc)
1,000 hours (225 cc and greater)
SPECIFICATIONS (STANDARD TYPES)
iGX270 (PTO shaft type S with fuel tank)
Length×Width×Height 358×462×422 mm
(14.1×18.2×16.6 in)
Dry mass [weight] 30.3 kg (66.8 lbs)
Engine type 4-stroke, overhead valve,
single cylinder
Displacement
[Bore×Stroke]
Net power
(in accordance with SAE J1349*)
Max. Net torque
(in accordance with SAE J1349*)
270 cm
[77.0×58.0 mm (3.03×2.28 in)]
6.3 kW (8.6 PS, 8.4 bhp) at 3,600 rpm
19.1 N·m (1.98 kgf·m, 14.1 lbf·ft)
3
(16.5 cu-in)
at 2,500 rpm
Engine oil capacity 1.1 L (1.2 US qt, 1.0 lmp qt)
Fuel tank capacity 5.3 L (1.40 US gal, 1.17 lmp gal)
Cooling system Forced air
Ignition system CDI type magneto ignition
PTO shaft rotation Counterclockwise
iGX390 (PTO shaft type S with fuel tank)
Length×Width×Height 383×484×448 mm
(15.1×19.1×17.6 in)
Dry mass [weight] 36.4 kg (80.2 lbs)
Engine type 4-stroke, overhead valve,
single cylinder
Displacement
[Bore×Stroke]
Net power
(in accordance with SAE J1349*)
Max. Net torque
(in accordance with SAE J1349*)
389 cm
[88.0×64.0 mm (3.46×2.52 in)]
8.7 kW (11.8 PS, 11.7 bhp)
26.5 N·m (2.7 kgf·m, 19.5 lbf·ft)
3
(23.7 cu-in)
at 3,600 rpm
at 2,500 rpm
Engine oil capacity 1.1 L (1.2 US qt, 1.0 lmp qt)
Fuel tank capacity 6.1 L (1.61 US gal, 1.34 lmp gal)
Cooling system Forced air
Ignition system CDI type magneto ignition
PTO shaft rotation Counterclockwise
18 ENGLISH
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