Honda GX390UT2 User Manual

SPECIFICATIONS
GX270
*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.
Model GX270R2 GX270RT2 GX270U2 GX270UT2
Description code GCBMK GCBGT GCBMK GCBGT
Type 4 stroke, overhead valve, single cylinder, inclined by 25°
Displacement 270 cm3 (16.5 cu–in)
Bore x stroke 77.0 x 58.0 mm (3.0 x 2.3 in)
Net power (SAE J1349)*1 6.3 kW (8.4 HP) / 3,600 min-1 (rpm)
Continuous rated power 5.1 kW (6.8 HP) / 3,600 min-1 (rpm)
Maximum net torque (SAE J1349)*1 19.1 N·m (1.94 kgf·m, 14.1 lbf·ft) / 2,500 min-1 (rpm)
Compression ratio 8.5: 1
Fuel consumption
(at continuous rated power)
2.4 Liters (0.63 US gal, 0.53 Imp gal) / h
Ignition system C.D.I.(Capacitor Discharge Ignition) type magneto ignition
Ignition timing B.T.D.C. 10° / 1,400min-1 (rpm)
Spark advancer performance B.T.D.C. 10°- 20°
Spark plug BPR6ES (NGK) / W20EPR-U (DENSO)
Lubrication system Forced splash
Oil capacity 1.1 Liters (1.16 US qt, 0.97 Imp qt)
Recommended oil SAE 10W-30 API service classification SJ or later
Cooling system Forced air
Starting system Recoil, Recoil and Starter motor
Stopping system Ignition exciter coil circuit open
Carburetor Horizontal type, butterfly valve
Air cleaner Dual element type, Cyclone type, Oil bath type, Low profile type
Governor Mechanical centrifugal
Breather system Reed valve type
Fuel used Unleaded gasoline with a pump octane rating 86 or higher
Reduction case oil capacity
(1/2 reduction with clutch)
0.3 Liters (0.32 US qt, 0.26 Imp qt)
Clutch
(1/2 reduction
with clutch)
Type Centrifugal
Engagement start 1,800 min-1 (rpm)
Lock 2,200 min-1 (rpm)
gx240ut2_gx270ut2_gx340ut2_gx390ut2

Honda GX390UT2 Specifications

General

Brand	Honda
Model	GX390UT2
Category	Engine
Language	English