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TAKING CARE OF UNEXPECTED PROBLEMS
Possible Cause Correction ENGINE WILL
NOT START
1.
Check control positions.
Vent knob
CLOSE
Fuel valve OFF.
Open vent knob.
2.
Check fuel.
3.
Remove and inspect spark plug.
4.
Take engine to an authorized
Honda servicing dealer, or refer to shop manual.
Choke open.
Engine switch
OFF.
Out of fuel.
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.
Move lever to 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 plug (p. 9).
Dry and reinstall spark plug. Start engine with throttle lever in
MAX. position.
Replace or repair faulty components as necessary.
ENGINE LACKS
POWER
1.
Check air filter.
2.
Check fuel.
3.
Take engine to an authorized
Honda servicing dealer, or refer to shop manual.
Possible Cause
Filter element 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.
Correction
Clean or replace
filter element (p. 9).
Drain fuel tank and
carburetor (p. 11).
Refuel with fresh
gasoline (p. 7).
Replace or repair faulty components as necessary.
TECHNICAL INFORMATION
Serial Number Location
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.
ENGINE TYPE
ENGINE SERIAL NUMBER
Engine serial number: __ __ __ __ − __ __ __ __ __ __ __
Engine type: ___ ___ ___ ___
Date Purchased: ______ / ______ / ______
Remote Control Linkage
The throttle lever is provided with a hole for cable attachment.
THROTTLE CABLE
5 mm SCREW
CABLE CLAMP
THROTTLE LEVER
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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.
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.
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.
Honda utilizes lean carburetor settings and other 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.
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.
The U.S., California Clean Air Acts and Environment Canada
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.
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.
Tampering and Altering
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.
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Replacement Parts
The emission control systems on your Honda engine were designed, built, and certified to conform with EPA, California and
Canadian emission regulations. We recommend the use of genuine Honda 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.
Specifications
GXV50 (PTO shaft S type)
Length × Width ×
Height
Dry mass [weight]
Engine type
Displacement
[Bore × Stroke]
Net power
249 × 286 × 225 mm
(9.8
× 11.3
× 8.9 in)
5.2 kg (11.5 lbs)
4-stroke, overhead valve, single cylinder
49.4 cm (3.01 cu-in)
[41.8
× 36.0 mm (1.65
× 1.42 in)]
1.6 kW (2.2 PS, 2.1 bhp) at 7,000 rpm
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.
Max. Net torque
Engine oil capacity
Fuel tank capacity
Cooling system
Ignition system
PTO shaft rotation
2.7 N·m (0.28 kgf·m, 2.0 lbf·ft) at
4,500 rpm
0.25
(0.26 US qt , 0.22 Imp qt)
0.27
(0.071 US gal , 0.059 Imp gal)
Forced air
Transistor magneto
Counterclockwise
Maintenance
Follow the maintenance schedule on page 6 . Remember that this
schedule is based on the assumption that your machine will be used for its designed purpose. Sustained high-load or hightemperature operation, or use in unusually wet or dusty conditions, will require more frequent service.
Air Index
GXV57
Length × Width
Height
×
Dry mass [weight]
Engine type
Displacement
[Bore × Stroke]
Net power
249 × 286 × 240 mm
(9.8
× 11.3
× 9.4 in)
5.4 kg (11.9 lbs)
4-stroke, overhead valve, single cylinder
57.3 cm (3.50 cu-in)
[45.0
× 36.0 mm (1.77
× 1.42 in)]
1.5 kW (2.0 PS, 2.0 bhp) at 4,800 rpm An Air Index Information hang tag/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.
Max. Net torque
Engine oil capacity
Fuel tank capacity
Cooling system
Ignition system
PTO shaft rotation
3.2 N·m (0.33 kgf·m, 2.4 lbf·ft) at
4,000 rpm
0.25
(0.26 US qt , 0.22 Imp qt)
0.27
(0.071 US gal , 0.059 Imp gal)
Forced air
Transistor magneto
Counterclockwise 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
Moderate
Intermediate
Extended
Applicable to Emissions Durability Period
50 hours [0 − 80 cm (0 − 80 cc) inclusive]
125 hours [greater than 80 cm (80 cc)]
125 hours [0 − 80 cm (0 − 80 cc) inclusive]
250 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]
＊ 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 GXV50:
7,000 rpm , GXV57: 4,800 rpm (Net Power) and at GXV50: 4,500
rpm, GXV57: 4,000 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.
Tuneup Specifications
The Air Index Information hang tag/label must remain on the engine until it is sold. Remove the hang tag before operating the engine.
ITEM
Spark plug gap
Idle speed
Valve clearance
(cold)
Other specifications
SPECIFICATION
0.60
− 0.70 mm
(0.024
− 0.028 in)
MAINTENANCE
Refer to page 9
2,500 ± 200 rpm (GXV50)
IN: 0.08
± 0.02 mm
See your authorized
EX: 0.11
± 0.02 mm Honda dealer
No other adjustments needed.
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Quick Reference Information
Fuel
Engine oil
Spark plug
Maintenance
Unleaded gasoline
(Refer to page 7)
U.S.
Pump octane rating 86 or higher
Except
U.S.
Research octane rating 91 or higher
Pump octane rating 86 or higher
SAE 10W-30, API SJ or later, for general use.
Refer to page 7.
CR5HSB (NGK)
U16FSR-UB (DENSO)
Before each use:
Check engine oil level. Refer to page 8.
Check air filter. Refer to page 9.
First 10 hours:
Change engine oil. Refer to page 8.
Subsequent:
Refer to the maintenance schedule on page 6.
Wiring Diagram
Bl
(2)
(3)
(1)
(1)
(2)
(3)
SPARK PLUG
IGNITION COIL
Engine switch on the equipment powered by the engine.
Bl Black
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