Tuneup Specifications; Quick Reference Information; Wiring Diagrams - Honda Car Engine GX340 Owner's Manual

Tuneup Specifications

GX240/GX270/GX340/GX390
ITEM SPECIFICATION
Spark plug gap 0.7 0.8 mm −
(0.028 0.031 in)
Idle speed 1,400
Valve clearance IN: 0.15
(cold) EX: 0.20
Other
specifications

Quick Reference Information

Fuel Unleaded gasoline
U.S.
Except
U.S.
Engine oil SAE 10W-30, API SJ or later, for general use.
Refer to page 8.
Reduction Same oil as engine oil, see above (applicable
case oil types).
Spark plug BPR6ES (NGK)
W20EPR-U (DENSO)
Maintenance 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.
MAINTENANCE
Refer to page: 12
−
± 150 rpm Refer to page: 13
± 0.02 mm See your
± 0.02 mm authorized
Honda dealer
No other adjustments needed.
(Refer to page 8)
Pump octane rating 86 or higher
Research octane rating 91 or higher
Pump octane rating 86 or higher

Wiring Diagrams

With Oil Alert and Electric Starter
With Oil Alert and Without Electric Starter
(1) CONTROL BOX
(2) RECTIFIER
(3) FUSE
(4) CIRCUIT PROTECTOR
(5) ENGINE SWITCH
(6) OIL ALERT UNIT
(7) Type with Oil Alert unit
(8) OIL LEVEL SWITCH
Bl Black Br
Y Yellow O
Bu Blue Lb
G Green Lg
R Red P
W White Gr
ENGLISH
(9) CHARGING COIL
(10) IGNITION COIL
(11) SPARK PLUG
(12) STARTER MOTOR
(13) STARTER SOLENOID
(14) BATTERY (12 V)
(15) Type without Oil Alert unit
Brown
Orange
Light blue
Light green
Pink
Gray
19