Gx390 - Honda GX240RT2 Service And Repair Manual

SPECIFICATIONS

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
*1: 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.
gx240ut2_gx270ut2_gx340ut2_gx390ut2
GX390R2 GX390RT2
GCBHK GCBCT
4 stroke, overhead valve, single cylinder, inclined by 25°
389 cm3 (23.7 cu–in)
88.0 x 64.0 mm (3.5 x 2.5 in)
8.7 kW (11.7 HP) / 3,600 min-1 (rpm)
7.0 kW (9.4 HP) / 3,600 min-1 (rpm)
26.5 N·m (2.7 kgf·m, 19.5 lbf·ft) / 2,500 min-1 (rpm)
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-1 (rpm)
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
Mechanical centrifugal
Unleaded gasoline with a pump octane rating 86 or higher
GX390U2 GX390UT2
GCBHK GCBCT
8.2 ± 0.2: 1
Forced splash
Forced air
Reed valve type
GX390T2
GCBDT