Honda Engine GXV610 GXV620 GXV670 Owners Manual

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ENGLISH
HELPFUL TIPS & SUGGESTIONS
STORING YOUR ENGINE
Storage Preparation
Cleaning
Fuel
Engine OilAdding a Gasoline Stabilizer to Extend Fuel Storage Life
Draining the Fuel Tank and Carburetor
DRAIN SCREWCARBURETOR
11 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.
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.
Reinstall the spark plugs. Turn the engine for a few seconds by turning the engine switch
to the START position to distribute the oil in the cylinders. Pour a tablespoon 5 10 cm
(5 10 cc) of clean engine oil into
each cylinder. Remove the spark plugs (see page ). Change the engine oil (see page ). 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.
Add gasoline stabilizer following the manufacturer’s instructions.
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.
Stop the engine, and if the fuel tank is equipped with a fuel valve,
move the fuel valve to the CLOSED or OFF position.
Gasoline is highly flammable and explosive, and you
can be burned or seriously injured when handling
fuel.
Stop engine and keep heat, sparks, and flame away.
Handle fuel only outdoors.
Wipe up spills immediately.
Disconnect the fuel line to the engine, and drain the fuel tank
into an approved gasoline container. If the fuel tank is equipped
with a valve, turn the fuel valve to the OPEN or ON position to
enable draining. After draining is completed, reconnect the fuel
line.
Loosen the carburetor drain screw, and drain the carburetor into
an approved gasoline container. After draining is completed,
tighten the carburetor drain screw.
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.
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. Fuel system damage or engine performance problems resulting
from neglected storage preparation are not covered under the
Distributor’s Limited Warranty. 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. 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.1.
2.
3.
1.
2.
3. 1.
2.
4.
5.10 8
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TAKING CARE OF UNEXPECTED PROBLEMS
ENGINE WILL
NOT STARTPossible Cause Correction Storage Precautions
Removal from Storage
TRANSPORTING
ENGINE LACKS
POWERPossible Cause Correction
12 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.
Keep the engine level in storage. Tilting can cause fuel or oil
leakage. If possible, avoid storage areas with high humidity, because that
promotes rust and corrosion.
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.
Check your engine as described in the
BEFORE OPERATION
CHECKS
section of this manual (see page ).
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 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.Electric
starting:
Check battery
and fuse.
Check control
positions.
Check fuel.
Remove and
inspect spark
plugs.
Take engine to
an authorized
Honda
servicing
dealer, or refer
to shop
manual.Battery
discharged.
Fuse burnt out.
Fuel valve
CLOSED or OFF
(If equipped).
Choke open.
Engine switch
OFF.
Out of fuel.
Bad fuel; engine
stored without
treating or
draining
gasoline, or
refueled with
bad gasoline.
Spark plugs
faulty, fouled, or
improperly
gapped.
Spark plugs wet
with fuel
(flooded engine).
Fuel filter
restricted,
carburetor
malfunction,
ignition
malfunction,
valves stuck, etc.Recharge battery.
Replace fuse.
Move lever to
OPEN or ON
position.
Move lever to
CLOSED position
unless the engine
is warm.
Turn engine switch
to ON position.
Refuel (p. 7).
Drain fuel tank and
carburetor (p. 11).
Refuel with fresh
gasoline(p. 7).
Gap, or replace
spark plugs (p. 10).
Dry and reinstall
spark plugs. Start
engine with
throttle lever in
FAST position.
Replace or repair
faulty components
as necessary.
Check air filter.
Check fuel.
Take engine to
an authorized
Honda
servicing
dealer, or refer
to shop
manual.Filter element(s)
restricted.
Bad fuel; engine
stored without
treating or
draining
gasoline, or
refueled with
bad gasoline.
Fuel filter
restricted,
carburetor
malfunction,
ignition
malfunction,
valves stuck, etc.Clean or replace
filter element(s)
(p. 9).
Drain fuel tank and
carburetor (p. 11).
Refuel with fresh
gasoline (p. 7).
Replace or repair
faulty components
as necessary. Remove the battery and store it in a cool, dry place. Recharge the
battery once a month while the engine is in storage. This will help
to extend the service life of the battery.
Keep the engine level when transporting to reduce the possibility
of fuel leakage. If the fuel tank is equipped with a fuel valve, move
the fuel valve lever to CLOSED or OFF position. If the cylinders were coated with oil during storage preparation,
the engine may smoke briefly at startup. This is normal.1.
2.
3.
4.
5.
1.
2.
3. 3
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Battery Connections for Electric Starter
Serial Number Location Recommended Battery
WARNING:
Wash hands after handling.TECHNICAL INFORMATION
NEGATIVE ( )
BATTERY CABLEPOSITIVE ( )
BATTERY CABLE
STARTER SOLENOID ENGINE SERIAL NUMBER &
ENGINE TYPE LOCATION
13 Date Purchased: ______ / ______ / ______Engine type: ___ ___ ___ ___ Engine serial number: __ __ __ __ __ __ __ __ __ __ __ Record the engine serial number, type and purchase date in the
space below. You will need this information when ordering parts
and when making technical or warranty inquiries.
Coat the terminals and cable ends with grease. Connect the battery negative ( ) cable to the battery negative
( ) terminal as shown. Connect the battery positive ( ) cable to the battery positive ( )
terminal as shown. Connect the battery negative ( ) cable to an engine mounting
bolt, frame bolt, or other good engine ground connection. Connect the battery positive ( ) cable to the starter solenoid
terminal as shown. 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.12 V 45 Ah
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.
Battery posts, terminals, and related accessories
contain lead and lead compounds.
1.
2.
3.
4.
5.GXV610
GXV620
GXV670
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Remote Control Linkage Carburetor Modifications for High Altitude Operation
LEFT SIDE CONTROL
CONTROL LEVER
CHOKE CABLE
CABLE
HOLDER
5 mm SCREWSCABLE
HOLDER
THROTTLE CABLECONTROL LEVER
RIGHT SIDE CONTROL
CONTROL LEVER
CHOKE CABLE
CABLE
HOLDERCONTROL LEVER
5 mm SCREWS
CABLE HOLDER
THROTTLE CABLE
14 The throttle and choke control levers are provided with holes for
optional cable attachment. The following illustrations show
installation examples for a solid wire cable and for a flexible,
braided wire cable.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 each300-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.
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Emission Control System Information
Source of EmissionsReplacement Parts
Maintenance
Problems That May Affect Emissions Tampering and Altering The U.S., California Clean Air Acts and Environment Canada
15 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.The emission control systems on your Honda engine were
designed, built, and certified to conform with EPA, California
(models certified for sale in California), and Canadian emission
regulations. We recommend the use of genuine Honda parts
whenever you have maintenancedone. 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.
Follow the maintenance schedule on page . 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. 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 reduceevaporative emissions.
Black exhaust smoke or high fuel consumption. Afterburning (backfiring).
Misfiring or backfiring under load.
Rough idle.
Hard starting or stalling after starting. If you are aware of any of the following symptoms, have your
engine inspected and repaired by your servicing dealer.Altering or defeating the governor linkage or speed-adjusting
mechanism to cause the engine to operate outside its design
parameters. Removal or alteration of any part of the intake, fuel, or exhaust
systems. Tampering with or altering the emission control system may
increase emissions beyond the legal limit. Among those acts that
constitute tampering are: The following instructions and procedures must be followed in
order to keep the emissions from your Honda engine within the
emission standards. EPA, California and Canadian regulations require all
manufacturers to furnish written instructions describing the
operation and maintenance of emission control systems. 6
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ENGLISH
Specifications Air Index
Descriptive Term Applicable to Emissions Durability PeriodGXV610 (QAF-Type)
GXV620 (QAF-Type)
GXV670 (TAF-Type)
16459 457 431 mm
(18.118.017.0in)
43.8 kg (96.6 lbs)
614 cm
(37.5 cu-in)
[77.0 66.0 mm (3.03 2.60 in)]
Forced air
Transistor magneto
Counterclockwise
459 457 431 mm
(18.118.017.0in)
43.8 kg (96.6 lbs)
614 cm
(37.5 cu-in)
[77.0 66.0 mm (3.03 2.60 in)]
Forced air
Transistor magneto
Counterclockwise
464 473 449 mm
(18.318.617.7in)
45.3 kg (99.9 lbs)
670 cm
(40.9 cu-in)
[77.0 72.0 mm (3.03 2.83 in)]
Forced air
Transistor magneto
Counterclockwise 2.2
(2.3 US qt , 1.9 Imp qt) 1.7
(1.8 US qt , 1.5 Imp qt) 39.4 N·m (4.02 kgf·m, 29.1 lbf·ft) at
2,500 rpm 12.1 kW (16.5 PS, 16.2 bhp)
at 3,600 rpm
2.2
(2.3 US qt , 1.9 Imp qt) 1.7
(1.8 US qt , 1.5 Imp qt) 41.1 N·m (4.19 kgf·m, 30.3 lbf·ft) at
2,500 rpm 13.3 kW (18.1 PS, 17.8 bhp)
at 3,600 rpm
2.5
(2.6 US qt , 2.2 Imp qt) 2.0
(2.1 US qt , 1.8 Imp qt) 44.4 N·m (4.53 kgf·m, 32.7 lbf·ft) at
2,500 rpm 15.5 kW (21.1 PS, 20.8 bhp)
at 3,600 rpm
The power rating of the engine indicated in this document is the
net power output tested on a production engine for the engine
model and measured in accordance with SAE J1349 at 3,600
rpm (Net Power) and at 2,500 rpm (Max. Net Torque). Mass
production engines may vary from this value.
Actual power output for the engine installed in the final machine
will vary depending on numerous factors, including the
operating speed of the engine in application, environmental
conditions, maintenance, and other variables. Length Width
Height
Dry mass [weight]
Engine type
Displacement
[Bore Stroke]
Net power
Max. Net torque
Engine oil capacity
Cooling system
Ignition system
PTO shaft rotation
Length Width
Height
Dry mass [weight]
Engine type
Displacement
[Bore Stroke]
Net power
Max. Net torque
Engine oil capacity
Cooling system
Ignition system
PTO shaft rotation
Length Width
Height
Dry mass [weight]
Engine type
Displacement
[Bore Stroke]
Net power
Max. Net torque
Engine oil capacity
Cooling system
Ignition system
PTO shaft rotation 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.
Extended Intermediate
Moderate
125 hours [0 80 cm
(0 80 cc) inclusive]
250 hours [greater than 80 cm
(80 cc)] 50 hours [0 80 cm
(0 80 cc) inclusive]
125 hours [greater than 80 cm
(80 cc)]
300 hours [0 80 cm
(0 80 cc) inclusive]
500 hours [greater than 80 cm
(80 cc)]
1,000 hours [225 cm
(225 cc) and greater] 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.
Without oil filter replacement:
With oil filter replacement:
Without oil filter replacement:
With oil filter replacement:
Without oil filter replacement:
With oil filter replacement: (Models certified for sale in California)
4-stroke, overhead valve, 2 cylinders (90° V-Twin)
4-stroke, overhead valve, 2 cylinders (90° V-Twin)
4-stroke, overhead valve, 2 cylinders (90° V-Twin)
(in accordance with SAE J1349 )
(in accordance with SAE J1349 )
(in accordance with SAE J1349 )
(in accordance with SAE J1349 )
(in accordance with SAE J1349 )
(in accordance with SAE J1349 )
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Wiring Diagrams
ITEM Tuneup Specifications
Quick Reference InformationMAINTENANCE SPECIFICATION GXV610/620/670
3 A Charge Coil and Switch Box Type
20 A Charge Coil and Switch Box Type
17 Spark plug gap
Idle speed
Valve clearance
(cold)
No other adjustments needed. 1,400 150 rpm
Fuel
Engine oil
Spark plug
MaintenanceU.S.
Except
U.S.Pump octane rating 86 or higher
Research octane rating 91 or higher
Pump octane rating 86 or higher
ZGR5A (NGK)
J16CR-U (DENSO)Refer to page 10.
Unleaded gasoline (Refer to page 7).
SAE 10W-30, API SJ or later, for general use.
Refer to page 7.
Before each use:
Check engine oil level. Refer to page 7.
Check air filter. Refer to page 9.
First 20 hours:
Change engine oil. Refer to page 8.
Subsequent:
Refer to the maintenance schedule on page 6.IN: 0.15 0.02 mm
EX: 0.20 0.02 mm0.7 0.8 mm
(0.028 0.031 in)
Other specificationsSee your authorized
Honda dealer
Bl
Y
Bu
G
R
WBlack
Yellow
Blue
Green
Red
WhiteBr
O
Lb
Lg
P
GrBrown
Orange
Pink
Gray
FUEL CUT
SOLENOID
STARTER MOTOR
BATTERY
LEFT SPARK PLUG
RECTIFIER MAIN FUSE
Bl
Y
Bu
G
R
WYellow
Blue
Green
Red
WhiteBr
O
Lb
Lg
P
GrOrange
Pink
Gray Black BrownCHARGE COIL (3A) ENGINE GROUND
RIGHT SPARK PLUG
ENGINE STOP DIODE ENGINE SWITCH (A)
(B)
(C)
(D)
(E)
(F)
(G)
(H)
(I)
(J)
(K)
(L)
(M)
FUEL CUT
SOLENOID
STARTER MOTOR
BATTERY
LEFT SPARK PLUG MAIN FUSE
ENGINE GROUND
RIGHT SPARK PLUG
ENGINE STOP DIODE ENGINE SWITCH (A)
(B)
(C)
(D)
(E)
(F)
(G)
(H)
(I)
(J)
(K)
(L)
(M) REGULATOR/
RECTIFIER LEFT IGNITION
COIL
RIGHT IGNITION
COIL
LEFT IGNITION
COIL
RIGHT IGNITION
COIL CHARGE COIL (20A)
Light blue
Light blue
Light green
Light green
OFF
ON
START
STARTON OFF
07/10/25 16:06:38 32Z6E600_017 
						

							¬­µ Canada: United States, Puerto Rico, and U.S. Virgin Islands:
For European Area:
United States, Puerto Rico, and U.S. Virgin Islands:
All Other Areas:
Honda’s Office
United States, Puerto Rico, and U.S. Virgin Islands:
American Honda Motor Co., Inc.Canada:
Honda Canada, Inc.
DISTRIBUTOR/DEALER LOCATOR INFORMATION
CUSTOMER SERVICE INFORMATIONAustralia:
Honda Australia Motorcycle and Power Equipment Pty. Ltd.
For European Area:
Honda Europe NV.
All Other Areas:
ENGLISH
CONSUMER INFORMATION
18 or visit our website: www.honda.ca Call (888) 9HONDA9 or visit our website: www.honda-engines.com Call (800) 426-7701
visit our website: http://www.honda-engines-eu.com
Servicing dealership personnel are trained professionals. They
should be able to answer any question you may have. If you
encounter a problem that your dealer does not solve to your
satisfaction, please discuss it with the dealership’s management.
The Service Manager, General Manager, or Owner can help.
Almost all problems are solved in this way.
If you are dissatisfied with the decision made by the dealership’s
management, contact the Honda Regional Engine Distributor for
your area.
If you are still dissatisfied after speaking with the Regional Engine
Distributor, you may contact the Honda Office as shown.
If you are dissatisfied with the decision made by the dealership’s
management, contact the Honda Office as shown.
When you write or call, please provide this information:
Equipment manufacturer’s name and model number that the
engine is mounted on
Name of dealer who sold the engine to you
Name, address, and contact person of the dealer who services
your engine
Date of purchase
Your name, address and telephone number
A detailed description of the problem
Power Equipment Division
Customer Relations Office
4900 Marconi Drive
Alpharetta, GA 30005-8847715 Milner Avenue
Toronto, ON
M1B 2K8
Telephone:
Or telephone: (770) 497-6400, 8:30 am - 8:00 pm ET Engine model, serial number, and type (see page )(888) 9HONDA9
(888) 946-6329
(416) 299-3400
(877) 939-0909
(416) 287-4776Toll free
Local Toronto dialing area
Toll free
Local Toronto dialing area Facsimile:
1954 1956 Hume Highway Campbellfield Victoria 3061
Telephone:
Facsimile:(03) 9270 1111
(03) 9270 1133
European Engine Center
http://www.honda-engines-eu.com
Please contact the Honda distributor in your area for assistance.
13
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