10
AIR INDEX
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.
The durability description is intended to provide you with information
relating 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 (page 11) for
additional information.
The Air Index Information hang tag/label must remain on the engine
until it is sold. Remove the hang tag before operating the engine.
SPECIFICATIONS TUNEUP SPECIFICATIONS
Specifications may very according to the types, and are subject to
change without notice.
CONSUMER INFORMATION
Honda Publications
These publications will give you additional information for maintaining
and repairing your engine.You may order them from an authorized
Honda engine servicing dealer.
Wiring Diagram
Descriptive Term Applicable to Emissions Durability Period
Moderate 50 hours (0–65 cc)
125 hours (greater than 65 cc)
Intermediate 125 hours (0–65 cc)
250 hours (greater than 65 cc)
Extended 300 hours (0–65 cc)
500 hours (greater than 65 cc)
Dimensions GXV340K2 (DN type) GXV390K1 (DN type)
Length x Width x
Height
17.0 x 15.0 x 16.0 in
(433 x 382 x 406 mm)
Dry weight 32.3 lb (71.2 kg) 33.3 lb (73.4 kg)
Engine type 4-stroke, overhead valve, single cylinder
Displacement 20.6 cu. in (338 cc) 23.7 cu. in (389 cc)
Bore x Stroke 3.2 x 2.5 in (82 x 64 mm) 3.5 x 2.5 in (88 x 64 mm)
Maximum output 11.0 hp @ 3,600 rpm 13.0 hp @ 3,600 rpm
Maximum torque 17.7 ft-lb (24.0 N•m)
@ 2,500 rpm
20.3 ft-lb (27.5 N•m)
@ 2,500 rpm
Fuel consumption 0.51 lb/hph, 340 g/kW•h
Cooling system Forced air
Ignition system Transistorized magneto
Lubrication system Pressure/Forced splash
PTO shaft rotation Counterclockwise (from PTO side)
ITEM SPECIFICATION PAGE
Spark plug gap 0.70 - 0.80 mm (0.028 - 0.031 in) 6
Idle speed 1,400 ± 150 rpm -
Valve clearance (cold) IN: 0.15 ± 0.02 mm
EX: 0.20 ± 0.02 mm
See your authorized
Honda dealer
Other specifications No other adjustments needed.
Shop Manual
This manual covers complete maintenance and
overhaul procedures. It is intended to be used by
a skilled technician.
Parts Catalog This manual provides complete, illustrated parts
lists.