Tuneup Specifications
GX610/620/670
ITEM
SPECIFICATION
Spark plug gap
0.70 0.80 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 (Refer to page 7 ).
U. S.
Except
U. S.
Engine oil
SAE 10W-30, API SJ or SL, for general use.
Refer to page 8.
Spark plug
ZGR5A (NGK)
J16CR-U (DENSO)
Maintenance
Before each use:
Check engine oil level. Refer to page 7.
Check air filter. Refer to page 9.
First 20 hours:
Change engine oil. Refer to page 8.
Subsequent:
Refer to the maintenance schedule on page 6.
18
MAINTENANCE
−
Refer to page 10
−
±
150 rpm
See your authorized
Honda dealer
±
0.02 mm
See your authorized
±
0.02 mm
Honda dealer
No other adjustments needed.
Pump octane rating 86 or higher
Research octane rating 91 or higher
Pump octane rating 86 or higher
Wiring Diagrams
3 A Charge Coil and Switch Box Type
20 A Charge Coil and Switch Box Type
ENGLISH
OFF
ON
START
Bl
Black
Br
Brown
Y
Yellow
O
Orange
Bu
Blue
Lb
Light blue
G
Green
Lg
Light green
R
Red
P
Pink
W
White
Gr
Gray
(A)
MAIN FUSE
(B)
ENGINE SWITCH
(C)
CONTROL BOX
(D)
OIL ALERT UNIT
(E)
OIL LEVEL SWITCH
(F)
FUEL CUT
SOLENOID
(G)
STARTER MOTOR
(H)
BATTERY
(I)
CHARGE COIL (3A)
(J)
LEFT IGNITION
COIL
(K)
LEFT SPARK PLUG
(L)
RIGHT IGNITION
COIL
(M)
RIGHT SPARK PLUG
(N)
ENGINE STOP DIODE
(O)
RECTIFIER
OFF
ON
START
Bl
Black
Br
Brown
Y
Yellow
O
Orange
Bu
Blue
Lb
Light blue
G
Green
Lg
Light green
R
Red
P
Pink
W
White
Gr
Gray
(A)
MAIN FUSE
(B)
ENGINE SWITCH
(C)
CONTROL BOX
(D)
OIL ALERT UNIT
(E)
OIL LEVEL SWITCH
(F)
FUEL CUT
SOLENOID
(G)
STARTER MOTOR
(H)
BATTERY
(I)
CHARGE COIL (3A)
(J)
LEFT IGNITION
COIL
(K)
LEFT SPARK PLUG
(L)
RIGHT IGNITION
COIL
(M)
RIGHT SPARK PLUG
(N)
ENGINE STOP DIODE
(O)
REGULATOR/
RECTIFIER