Product Manual

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ENGLISH
Wiring Diagrams
Quick Reference Information
Tuneup Specifications
ITEM SPECIFICATION MAINTENANCE
GX240/GX270/GX340/GX390
With Oil Alert and Electric Starter
With Oil Alert and Without Electric Starter
19
Fuel
Engine oil
Reduction
case oil
Spark plug
Maintenance
SAE 10W-30, API SJ or later, for general use.
Refer to page 8.
Same oil as engine oil, see above (applicable
types).
Before each use:
Check engine oil level. Refer to page 9.
Check reduction case oil (applicable types).
Refer to page 9.
Check air filter. Refer to page 10.
First 20 hours:
Change engine oil. Refer to page 9.
Change reduction case oil (applicable types).
Refer to page 10.
Subsequent:
Refer to the maintenance schedule on page 7.
W20EPR-U (DENSO)
BPR6ES (NGK)
U.S.
Except
U.S.
Pump octane rating 86 or higher
Research octane rating 91 or higher
Pump octane rating 86 or higher
Unleaded gasoline (Refer to page 8)
Spark plug gap
Idle speed
Valve clearance
(cold)
Other
specifications
1,400 150 rpm
IN: 0.15 0.02 mm
EX: 0.20 0.02 mm
0.7 0.8 mm
(0.028 0.031 in)
Refer to page: 12
Refer to page: 13
See your
authorized
Honda dealer
No other adjustments needed.
CONTROL BOX
RECTIFIER
ENGINE SWITCH
OIL LEVEL SWITCH
CHARGING COIL
SPARK PLUG
STARTER MOTOR
STARTER SOLENOID
BATTERY (12 V)
Black
Yellow
Blue
Green
Red
White
Brown
Orange
Light blue
Light green
Pink
Gray
Br
O
Lb
Lg
P
Gr
Bl
Y
Bu
G
R
W
FUSE
Type with Oil Alert unit
IGNITION COIL
CIRCUIT PROTECTOR
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
10/08/24 15:00:57 32Z8R600_019