Gx390 - Honda GX240 Technical Manual

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GX390

Model
Description code
Type
Displacement
Bore x stroke
Net power (SAE J1349)*1
Continuous rated power
Maximum net torque (SAE
J1349)*1
Compression ratio
Fuel consumption
(at continuous rated
power)
Ignition system
Ignition timing
Spark plug
Lubrication system
Oil capacity
Recommended oil
Cooling system
Starting system
Stopping system
Carburetor
Air cleaner
Governor
Breather system
Fuel used
* 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.
© 2010 American Honda Motor Co., Inc — All Rights Reserved
GX390R2 GX390RT2
GCBHK GCBCT
4 stroke, overhead valve, single cylinder, inclined by 25°
88.0 x 64.0 mm (3.5 x 2.5 in)
8.7 kW (11.7 HP) / 3,600 min
7.0 kW (9.4 HP) / 3,600 min
26.5 N·m (2.7 kgf·m, 19.5 lbf·ft) / 2,500 min
3.5 Liters (0.92 US gal, 0.77 Imp gal) / h
C.D.I.(Capacitor Discharge Ignition) type magneto ignition
B.T.D.C. 10° / 1,400 min
BPR6ES (NGK) / W20EPR-U (DENSO)
1.1 Liters (1.16 US qt, 0.97 Imp qt)
SAE 10W-30 API service classification SJ or later
Recoil, Recoil and Starter motor
Ignition primary circuit open
Horizontal type, butterfly valve
Dual element type, Cyclone type, Low profile type
Unleaded gasoline with a pump octane rating 86 or higher
GX390U2 GX390UT2
GCBHK GCBCT
3
389 cm (23.7 cu–in)
-1
(rpm)
-1
(rpm)
8.2 ± 0.2: 1
-1
(rpm)
Forced splash
Forced air
Mechanical centrifugal
Reed valve type
GX390T2
GCBDT
-1
(rpm)
39