REASSEMBLY:
Refer to GX120·GX160·
GX200 Engine Assembly
Information.
REASSEMBLY:
Refer to GX120·GX160·GX200
Engine Assembly Information.
SECOND RING
(BLACK FACED)
PISTON
CRANKCASE COVER, CRANKSHAFT, PISTON
GX240
・
GX270R/RT/T/U/UT Engine Assembly Information
10 mm
(0.4 in)
SECOND RING (BLACK FACED)
OIL RING
PISTON
SIDE RAIL (2)
SPACER
TOP RING (CHROME FACED)
PISTON PIN
CONNECTING ROD
PISTON RINGS
PISTON PIN CLIP (2)
PISTON PIN
CLIP
CUT OUT
OIL RING
(COMBINATION RINGS)
TOP RING
(CHROME FACED)
BALANCER
BALANCER
BALANCER
DRIVE GEAR
(large gear on the
crankshaft)
PUNCH MARKS
CAMSHAFT
PUNCH MARKS
TIMING GEAR
(smaller gear on
the crankshaft)
BALANCER
CRANKSHAFT
REASSEMBLY:
Push in until the bearing touches the crankcase.
Be careful not to damage the oil seal.
TIMING GEAR/
BALANCER GEAR
CONNECTING ROD CAP
REASSEMBLY:
Install with the oil dipper toward the camshaft and
the ribs on the cap and connecting rod aligned.
CAMSHAFT
REASSEMBLY:
Before installing, inspect for worn and weakened springs
and check that the decompressor weight moves smoothly.
REASSEMBLY:
Install with the
triangle mark
toward the
pushrod hole.
PISTON
BALL
BEARING
OIL SEAL
30 x 46 x 8 mm
TRIANGLE MARK
DECOMPRESSOR
WEIGHT
DISASSEMBLY:
When removing, mark so that the IN
and EX sides can be distinguished.
REASSEMBLY:
Install the lifters immediately before
installing the camshaft.
VALVE LIFTER (2)
CONNECTING ROD BOLT (2)
14 N·m (1.4 kgf·m, 10 lbf·ft)
CRANKSHAFT/BALANCER/PISTON
7 x 7 x 33 mm KEY
(L,S type only)
6.3 x 6.3 x 43 mm KEY
(Q type only)
DOWEL PIN (2)
WASHER
GOVERNOR ARM SHAFT
CLIP
BALL BEARING
CRANKCASE GASKET
GOVERNOR WEIGHT HOLDER
WASHER
GOVERNOR
PIN (2)
GOVERNOR WEIGHT (2)
GOVERNOR SLIDER
LOCK PIN
REASSEMBLY:
· Install the lock pin immediately
after installing the governor arm
shaft, and move the shaft to the
cylinder side as shown.
· The lock pin must be installed
with the straight side of the pin
against the groove in the shaft.
REASSEMBLY:
Install inside the case.
REASSEMBLY:
After installing, rotate the shaft to
the cylinder barrel side.
REASSEMBLY:
Install firmly into the shaft groove.
REASSEMBLY:
Spread the governor weights to
install the slider; then check to be
sure the slider moves smoothly.
REASSEMBLY:
Check that the weights move freely.
8 x 35 (7)
24 N·m
(2.4 kgf·m, 17 lbf·ft)
REASSEMBLY:
Before installing, check for wear and
damage of the gear.
CRANKCASE COVER
OIL SEAL
30 x 46 x
8 mm
6 x 16 mm WASHER (Equipped type)
CYLINDER HEAD/VALVES
Refer to GX340
・
GX390K1/R1/T1/U1/UT1 Engine Assembly Information.
REASSEMBLY:
Align the hole of the
starter pulley with the
boss of the cooling fan.
10 mm
FLANGE
NUT
10 N·m
(1.0 kgf·m, 7 lbf·ft)
OIL DRAIN
BOLT (2)
23 N·m (2.3 kgf·m, 17 lbf·ft)
© Honda Motor Co., Ltd. 2009
OIL LEVEL SWITCH
GREAS
GREASE
MARKING
REASSEMBLY:
Install the connecting rod with the long
end toward the triangle-marked side of
the piston.
DRAIN BOLT WASHER
Replace.
CRANKCASE COVER/GOVERNOR
Do not reuse.
WOODRUFF KEY
FLYWHEEL
16 mm FLANGE NUT
TORQUE:
115 N·m
(11.5 kgf·m, 83 lbf·ft)
DISASSEMBLY/
REASSEMBLY:
· Apply oil to the threads.
· Hold the flywheel by
placing a screwdriver
into the pulley.
STARTER PULLEY
REASSEMBLY:
Insert securely into the
two ribs on the crankcase
as shown.
REASSEMBLY:
After installing the flywheel, check to
be sure that the woodruff key is still
in its slot on the crankshaft.
COOLING FAN
BLACK WIRE
NOTICE:
When disassembling and reassembling,
take care not to damage the fan blades.
REASSEMBLY:
Attach by aligning the three lugs
on the rear side of the fan with the three holes
in the flywheel.
(SD, SN, QD
types only)
DISASSEMBLY:
・
Remove the ignition coil before
removing the flywheel.
・
Do not hit the flywheel with a
hammer. Remove with the special
tool.
REASSEMBLY:
Clean the crankshaft tapered surface
before installation.
FLYWHEEL
PULLER
07935-8050004
(Honda's special
tool)
FLYWHEEL/IGNITION COIL
LUG (3)
COOLING FAN
FLYWHEEL
HOLE (3)
ALIGN
6 x 28 (2)
SPARK PLUG CAP
IGNITION COIL
HIGH TENSION CORD
See the shop manual for additional information.
