Makita PM7651H Manual

March 2016
TECHNICAL INFORMATION
OFFICIAL USE
for ASC & Sales Shop
Specification
Engine
Max output: kW (PS)
Max torque: N·m
Specification Model
Fuel
Type
Displacement: mL (cu.in.)
Dry weight*3: kg (lbs)
2.7 (3.7) at 7,000 rpm
Max rotation speed at no load: min-ı= rpm 7,400
4.4 at 5,000 rpm
4-stroke
PM7651H
YesCompliance with exhaust emission regulations
14.1 (31.1)
Engine oil SAE10W-30 oil,
Class SF or higher of API Classification
75.6 (4.61)
Straight unleaded gasoline*1(E0 to E10)
*1 "Straight" means "not mixed with engine oil".
*2 With nozzle
*3 With Straight pipe 380, without Hip belt
DiaphragmCarburetor
YesRotation limiter
Model PM7651H is a Petrol mist blower powered by 75.6mL
4-stroke engine, and developed based on the current model PM7650H.
The modifications from the current model PM7650H are as follows:
● Compliance with EU standards
• Lock-off button on the handle
• Without lock-on function for throttle
• Non-removable tank cap with retaining strap
• Gap between strainer and tank is 2mm or less
● Throttle lever with 3-stage switching function
● Anti-static throttle lever
Dimensions: mm (")
Width (W)
Height (H)
Length (L)
440 (17-1/4)
420 (16-1/2)
595 (23-1/2)
CONCEPT AND MAIN APPLICATIONS H
W
L
Yes (Mechanical)
Starting system
Decompression
Easy start
(Spring-assisted recoil starter) No
CMR6ASpark plug
YesPrimer pump
1.8 (61)Fuel tank capacity: L (US oz)
15.0 (507)Solution tank capacity: L (US oz)
16.0 (52)Max spray range (horizontal): m (ft)
85Max air speed: m/s
14.1 (497)Max air volume*2: m³/min
1 / 41
Petrol Mist Blower
Model No. PM7651H
Description

OFFICIAL USE
for ASC & Sales Shop
2 / 41
Standard equipment
Oil bottle*1
Box wrench
Hand strap
Flexible pipe
Hose clamp 76 (x4)
Hose clamp 100 (x1)
Hip belt set*2
Straight pipe 630*2
Straight pipe 380*2
Bent pipe 630*2
End pipe 200*2
End pipe 450*2
Flat pipe*2
Nozzle 0.8*2
Tube 10-500*2
*1 With engine oil contained for some countries
*2 Depends on destinations.
Note: The standard equipment may vary by country or model variation.
Optional accessories
Straight pipe 630
Straight pipe 380
Bent pipe 630
End pipe 200
End pipe 450
Flat pipe
Hose clamp set
Oil bottle set (inc. 220mL engine oil)
Air cleaner element
Nozzle 0.8
Nozzle 0.7
Nozzle 0.5
Hip belt set
O ring set

1INDEX
1INDEX.......................................................................................................................................................................................... 3
2CAUTION .................................................................................................................................................................................... 5
3HANDLING OF GASKET.......................................................................................................................................................... 5
4NECESSARY REPAIRING TOOLS ........................................................................................................................................... 5
5LUBRICANT AND ADHESIVE APPLICATION ...................................................................................................................... 6
5-1 Several sections.................................................................................................................................................................... 6
5-2 Cylinder block section.......................................................................................................................................................... 7
6REPAIR ........................................................................................................................................................................................ 8
6-1 Nozzle section...................................................................................................................................................................... 8
6-1-1 Disassembling ............................................................................................................................................................. 8
6-1-2 Assembling.................................................................................................................................................................. 8
6-2 Cock section......................................................................................................................................................................... 9
6-2-1 Disassembling ............................................................................................................................................................. 9
6-2-2 Assembling................................................................................................................................................................ 10
6-3 Pipe section ........................................................................................................................................................................ 11
6-3-1 Disassembling ........................................................................................................................................................... 11
6-3-2 Assembling................................................................................................................................................................ 11
6-4 Engine cover complete, Recoil, Fuel tank.......................................................................................................................... 12
6-4-1 Disassembling ........................................................................................................................................................... 12
6-4-2 Assembling................................................................................................................................................................ 13
6-5 Control cable ...................................................................................................................................................................... 14
6-5-1 Disassembling ........................................................................................................................................................... 14
6-5-2 Assembling................................................................................................................................................................ 14
6-6 Tank complete (Chemical tank) ......................................................................................................................................... 15
6-6-1 Disassembling ........................................................................................................................................................... 15
6-6-2 Assembling................................................................................................................................................................ 16
6-7 Blower section.................................................................................................................................................................... 17
6-7-1 Disassembling ........................................................................................................................................................... 17
6-7-2 Assembling................................................................................................................................................................ 18
6-8 Frame section ..................................................................................................................................................................... 19
6-8-1 Disassembling ........................................................................................................................................................... 19
6-8-2 Assembling................................................................................................................................................................ 19
6-9 Ignition system................................................................................................................................................................... 20
6-9-1 Checking plug cap..................................................................................................................................................... 20
6-9-2 Checking Spark plug ................................................................................................................................................. 20
6-9-3 Checking of Ignition coil........................................................................................................................................... 21
6-9-4 Checking of Ignition coil (cont.) ............................................................................................................................... 22
6-9-5 Removing Ignition coil.............................................................................................................................................. 23
6-9-6 Mounting Ignition coil............................................................................................................................................... 23
6-9-7 Removing Flywheel complete................................................................................................................................... 24
6-9-8 Mounting Flywheel complete.................................................................................................................................... 24
6-10 Starter unit.......................................................................................................................................................................... 25
6-10-1 Disassembling Recoil starter ..................................................................................................................................... 25
6-10-2 Assembling Recoil starter.......................................................................................................................................... 25
6-11 Carburetor section .............................................................................................................................................................. 27
6-11-1 Removing Carburetor................................................................................................................................................ 27
6-11-2 Disassembling/Cleaning Carburetor.......................................................................................................................... 27
6-11-3 Assembling Carburetor ............................................................................................................................................. 29
6-11-4 Vacuum leak test of Carburetor ................................................................................................................................. 29
6-11-5 Mounting Carburetor................................................................................................................................................. 29
6-11-6 Adjusting Carburetor................................................................................................................................................. 30
6-12 Stop switch......................................................................................................................................................................... 31
6-12-1 Checking Stop switch................................................................................................................................................ 31
6-13 Fuel tube section ................................................................................................................................................................ 31
6-13-1 Fuel tube routing ....................................................................................................................................................... 31
6-14 Engine block ...................................................................................................................................................................... 32
6-14-1 Engine block section ................................................................................................................................................. 32
3 / 41

6-15 Engine block ...................................................................................................................................................................... 37
6-15-1 Cylinder head section ................................................................................................................................................ 37
6-15-2 Adjustment of valve clearance .................................................................................................................................. 39
6-15-3 Assembling of Muffler exhaust and Insulator complete............................................................................................ 39
6-16 Final check......................................................................................................................................................................... 40
7TIGHTENING TORQUE SPECIFICATIONS .......................................................................................................................... 41
4 / 41

2CAUTION
Repair the machine in accordance with “Instruction manual” or “Safety instructions.
Follow the instructions described below in advance before repairing:
· Wear gloves.
· When the engine is hot from use, cool down the engine enough or you can get burned.
· Remove remaining fuel from Fuel tank and Carburetor completely. [FLAMMABLE MATERIAL KEEP FIR E AWAY ]
· Remove Spark plug cap from Spark plug.
· Repair the engine on a stable workbench and in a clean workplace kept as free of dust and debris as possible.
· In order to avoid wrong reassembly, draw or write down where and how the parts are assembled, and what are the parts.
It is also recommended to have boxes ready to keep disassembled parts by group.
· Handle the disassembled parts carefully. Clean and wash them properly.
· If some bolts and screws are too tight, use Impact driver.
· Tighten the bolts and the screws to the specified torque as shown in "7 TIGHTENING TORQUE SPECIFICATIONS".
· Each time after you mounted a main part of the engine such as the piston, check if it moves smoothly without abnormal noise by
manually turning the crankshaft.
· After completion of reassembly, check for loose parts or abnormal noise and vibration by manually turning the crankshaft.
3HANDLING OF GASKET
Once Gasket is removed:
[1] Clean up the mating surfaces where the gasket was installed to maintain its sealing performance.
[2] Replace the removed Gaskets with new ones. Do not reuse them.
4NECESSARY REPAIRING TOOLS
Code No.
Description
Use for
1R070
Tachometer
measuring engine rpm
1R127
Air density tester
diagnosing Carburetor
1R181
Ignition checker
diagnosing Ignition coil
1R223
Torque wrench shaft 20-90N·m
tightening Nut that holds Flywheel
1R268
Spring pin extractor M3
disassembling Band
1R286
Round bar for Arbor 12-50
removing Piston pin
1R288
Screwdriver magnetizer
removing Cotter
1R364
Flywheel puller
removing Flywheel
1R366
Feeler gauge set
adjusting Ignition coil, Spark plug, Rocker arm
1R372
Crank shaft lock bolt M10
holding Flywheel
1R389
Cotter removal attachment
assembling/removing Va l v e (used together with 1R005)
1R402-A
Digital tester
diagnosing Stop switch and Ignition coil
-
Hex socket bit 14
mounting/removing Flywheel
-
Wire brush
cleaning Spark plug
5 / 41

5LUBRICANT AND ADHESIVE APPLICATION
Apply the following lubricants and adhesives.
5-1 Several sections
Lubricant
Amount
Makita grease FA No.2
a little
4-stroke engine oil
a little
Outer circumference
of O ring 93
Elbow
Spiral spring
Any lubricants
are available.
Nozzle cap
Top adapter
Diffusion
cover
Intake valve
Exhaust valve
Retainer
Cotter
Compression
spring 11
Cylinder head
complete
Valve guide
Cam lifter R
with a cross bar
Camgear assy
Pin 5
Note: short
Cam lifter L
Pin 5
Note: long
Fig. 5-1-1
Fig. 5-1-2
Fig. 5-1-3
Fig. 5-1-4
Fig. 5-1-5
6 / 41

5-2 Cylinder block section
Use parts cleaner or the like to remove grease from the mating surface of Crankcase to Cylinder block, and then apply ThreeBond
1215 or 1216 as shown below.
Oil route
Note: ThreeBond 1215 or 1216
should not be come into here.
Surface where
ThreeBond 1215 or
1216 should be applied
Fig. 5-2-1
7 / 41

6REPAIR
6-1 Nozzle section
6-1-1 Disassembling
6-1-2 Assembling
Assemble by reversing the disassembly procedure.
Fig. 6-1-1-1
[1] Remove Hose clamp 14 with remove Tube 10-500 (or Tube 10-250) from Nozzle adapter complete.
[2] Remove M5x18 Pan head screw to release Hose clamp 76, and remove Nozzle adapter complete, Straight pipe and Top
adapter.
[3] Remove Diffusion cover from Top adapter by turning it counterclockwise.
Fig. 6-1-1-2
[4] Remove 4x20 Tapping screw, and remove Sleeve 25
from Top adapter.
Fig. 6-1-1-3
[5] Remove O ring 28 from Sleeve 25.
Top adapter
Sleeve 25
4x20 Tapping screw
Sleeve 25
O ring 28
Fig. 6-1-1-4
[6] Remove Nozzle 4.5 from Nozzle adapter complete with
a slotted screwdriver.
Nozzle 4.5
Fig. 6-1-1-5
[7] Remove PT 3x10 Tapping screw bind, and remove
Nozzle cap from Nozzle adapter complete.
[8] Remove O-ring 12 from Nozzle cap.
[9] Remove Pin 5.5 and Compression spring 3 from Nozzle
adapter complete.
Apply Makita grease FA
No.2.
Top adapter
Diffusion cover
M5x18 Pan head screw
Nozzle adapter
complete
Straight pipe
Hose clamp 14
Tube 10-500 or Tube 10-250
Hose clamp
76
Compression
spring 3
Nozzle cap
PT 3x10 Tapping
screw bind
O-ring 12
Apply Makita grease
FA No.2.
Pin 5.5
Nozzle adapter
complete
Nozzle adapter
complete
8 / 41

6-2 Cock section
6-2-1 Disassembling
Fig. 6-2-1-1
[1] Release two Hose clamps 76, and remove Cock body
and Strainer case.
Cock body
Front side
Strainer case
Hose clamp 76 (2 pcs.)
Fig. 6-2-1-2
[2] The components of Cock section are as follows:
Cock
body
Strainer case
3x16 Tapping screw
(2 pcs.)
O-ring 12
Cap hose
Joint strainer
Pliers
Tube 10-500
Hose clamp 14
Hose clamp 14
Hose clamp 14
Tube 10-750
Fig. 6-2-1-3
[3] Remove 4x18 Tapping screw, and remove Cock lever.
4x18 Tapping screw
Cock lever
Cock
Fig. 6-2-1-4
[4] Screw 4x18 Tapping screw into Cock, and remove Cock
by holding it with long-nose pliers.
[5] Remove O-ring 9.
O-ring 9
Cock
4x18 Tapping screw
9 / 41

6-2-2 Assembling
[1] Assemble by reversing the disassembly procedure.
Fig. 6-2-2-1
[2] Apply Makita grease FA No.2 a little on the
outer circumference of Cock and O-ring 9.
Fig. 6-2-2-2
[3] Insert Cock into Cock body and turn it with pliers as shown below,
and assemble Cock lever with 4x18 Tapping screw.
O-ring 9
Cock
(1)
(2)
(3)
4x18 Tapping screw
Cock lever
Fig. 6-2-2-3
[4] Assemble Cock section to Straight pipe.
Straight pipe
Cock section
10 / 41

6-3 Pipe section
6-3-1 Disassembling
6-3-2 Assembling
Assemble by reversing the disassembly procedure.
Fig. 6-3-1-2
[2] Disconnect Tube 10-750.
[3] Release Hose clamp 76, and remove Straight pipe by
turning it.
Fig. 6-3-1-3
[4] Release Hose clamp 76, and remove Swivel pipe
complete and Flexible pipe complete.
Hose clamp 76
Swivel pipe
complete
Tube 10-750
Straight pipe
Swivel pipe
complete
Hose clamp 76
Flexible pipe
complete
Fig. 6-3-1-4
[5] Loosen M5x30 Thumb screw, and remove Control lever
assembly from Swivel pipe complete.
Fig. 6-3-1-5
[6] Release Hose clamp 100, and remove Elbow and
Flexible pipe complete.
Swivel pipe
complete
M5x30 Thumb
screw
Control lever assembly
Elbow
Hose clamp 100
Flexible pipe
complete
Fig. 6-3-1-1
[1] Overall view of Pipe section is as follows:
Fig. 6-3-1-2
Fig. 6-3-1-3, Fig. 6-3-1-4
Fig. 6-3-1-5
11 / 41

6-4 Engine cover complete, Recoil, Fuel tank
6-4-1 Disassembling
Fig. 6-4-1-1
[1] Remove three M5x20 Pan head screws, and remove
Recoil.
M5x20 Pan head
screw (3 pcs.)
Recoil
Fig. 6-4-1-2
[2] Remove four 5x20 Tapping screws, and remove Engine cover complete.
5x20 Tapping screw
(4 pcs.)
Engine cover
complete
12 / 41

6-4-2 Assembling
Assemble by reversing the disassembly procedure.
Fig. 6-4-1-3
[3] Remove the fuel tubes of Tube assembly from Carburetor and Primer pump. (Fig. 6-4-1-4)
[4] Remove three M6x12 Pan head screws, and remove Fuel Tank. (Fig. 6-4-1-5)
Fig. 6-4-2-1
Note:
· When connecting the fuel tubes of Tube assembly to Carburetor and Primer pimp, do not confuse them. Be sure to connect the
black one to Carburetor and the transparent blue one to Primer pump. (Fig. 6-4-1-4)
· When mounting Engine cover, be careful not to bend nor pinch the breather pipe. (Fig. 6-4-1-6)
· Do not forget to pass the fuel tubes of Tube assembly through the slit of Engine cover. (Fig. 6-4-2-1)
Engine cover, viewed
from the rear
Slit of Engine cover
Fig. 6-4-1-6
Breather
pipe
Fig. 6-4-1-4
Carburetor
Black fuel tube of
Tube assembly
Transparent blue
fuel tube of Tube
assembly
Primer pump
M6x12 Pan head screw (3 pcs.)
Fig. 6-4-1-5
Tube assembly
Fuel tank
13 / 41

6-5 Control cable
6-5-1 Disassembling
6-5-2 Assembling
Note: Be careful not to bend Control cable.
[1] Pass the inner cable of Control cable through Adjust screw and Adjust nut, then route it in the groove of Swivel and then hook
the cable end on Swivel. (Fig. 6-5-1-5)
[2] Put Control cable in the space between Volute case and Air cleaner cover complete. (Fig. 6-5-1-4)
[3] Fix Control cable and the high voltage cable of Ignition coil in the cable holder of Volute case 2.
Be sure to fix Control cable first, then the high voltage cable.
Make sure that Control cable is tight and vertically straight. (Fig. 6-5-1-3)
[4] Connect the bullet terminal of ON/OFF switch cords securely. (Fig. 6-5-1-2)
[5] Hold Cable tube to Elbow with a new Wire band that holds. (Fig. 6-5-1-1)
[2] Remove Control cable and ON/OFF switch cords from the hook of Volute case 2, then disconnect the bullet terminal of
ON/OFF switch cords. (Fig. 6-5-1-2)
[3] Remove Control cable and the high voltage cable of Ignition coil from the wire holder of Volute case 2. (Fig. 6-5-1-3)
[4] Pull Control cable out of the space between Volute case and Air cleaner cover complete. (Fig. 6-5-1-4)
[5] Remove Control cable from Carburetor. (Fig. 6-5-1-5)
Fig. 6-5-1-1
[1] Cut and remove Wire band with cutting pliers.
Wire band
Volute case
Air cleaner case complete
Control
cable
Control
cable
Inner cable
Swivel
Cable end
Adjust screw
Adjust nut
Carburetor
Control cable
High voltage
cable
Wire holder
Hook
Bullet terminal
Control cable
ON/OFF switch cord
of Switch complete
Fig. 6-5-1-2
Fig. 6-5-1-3
Fig. 6-5-1-4
Fig. 6-5-1-5
14 / 41

6-6 Tank complete (Chemical tank)
6-6-1 Disassembling
Fig. 6-6-1-1
[1] Remove Hose clamp 14, and remove Tube 10-750 from Joint strainer.
Fig. 6-6-1-2
[2] Remove Hose clamp 14, and remove Tube 10-300 from
Pressure pipe.
Hose clamp 14
Tube 10-300
Pressure pipe
Fig. 6-6-1-3
[3] Remove four E-4 Stop rings with small pliers and pull
out Pin 5 by tapping it with 1R268 to remove band R/L.
Note: Be careful not to lose E-4 Stop rings.
Use 1R268 to pull out.
Pin 5
E-4 Stop ring
Band R/ L
Fig. 6-6-1-4
[4] Remove five M5x12 Pan head screws, remove Cushion.
[5] Remove two M6x30 Pan head screws, remove Tank holders and Tank complete.
Note: Be careful not to lose Flat washers 6 and Compression springs 20.
[6] Remove four M6x30 Pan head screws, remove Tube cover and Tank complete.
Note: Be sure to hold Engine because it may fall down.
Cushion
M5x12 Pan head screw (5 pcs.)
M6x30 Pan head screw (4 pcs.)
Remove Tube cover.
Tube 10-420
Tube cover
Tank
complete
M6x30 Pan head screw
(2 pcs.)
Flat washer 6
(2 pcs.)
Tank complete
Tank holder
Compression
spring 20
Joint strainer
Hose clamp 14
Tube 10-750
15 / 41

6-6-2 Assembling
Assemble by reversing the disassembly procedure.
[7] Remove Hose clamp 14, and remove Sponge 12 by disconnecting Tube 10-300 from Joint 1. (Fig. 6-6-1-5)
[8] Remove Strap by removing Joint 1 and Grommet from the top of Tank complete. (Fig. 6-6-1-5 and Fig. 6-6-1-6)
[9] Remove Hose clamp 14, and remove Tube 10-500 from Joint 1 and Mixing body upper. (Fig. 6-6-1-6 and Fig. 6-6-1-7)
[10] Remove two M5x12 Pan head screws, and remove Mixing body upper from Mixing body lower. (Fig. 6-6-1-7)
[11] Remove Check valve and Flat washer 10 from Mixing body lower. (Fig. 6-6-1-7)
Note: Be sure not to lose Flat washer 10.
Fig. 6-6-1-5
Strap is hooked to
Joint 1.
Hose clamp 14
Tube 10-500
Strap
Tank cap assembly
Hose clamp 14
Joint 1
Grommet
Tube 10-300
Sponge 12
Fig. 6-6-1-6
Hose clamp 14
Tube 10-500
Mixing body
upper
Mixing
body lower
Check valve
M5x12 Pan
head screw
(2 pcs.)
Flat washer 10
Fig. 6-6-1-7
Joint 1
Grommet
Hose clamp 14
Tube 10-420
Fig. 6-6-1-8
Tank complete
16 / 41

6-7 Blower section
6-7-1 Disassembling
Fig. 6-7-1-2
[3] Remove two Tank holders from the threaded rods of Volute case 1 with a wrench.
[4] Pull out two Compression springs 20, then remove the other two Tank holders.
Fig. 6-7-1-1
[1] Remove two M6x20 Pan head screws, and remove Frame complete.
[2] Remove Lower frame holder and Compression spring 17 from Frame holder.
M6x20 Pan head
screw (2 pcs.)
Frame holder
Lower frame
holder
Compression
spring 17
Frame complete
Fig. 6-7-1-3
[5] Remove three 5x20 Tapping screws, and remove Fan guard.
[6] Remove nine 5x20 Tapping screws and two M5x65 Pan head screws, and remove Volute case 1 from Volute case 2.
Note: Be sure not to lose M5 Hex nut.
Fan guard
5x20 Tapping
screw (9 pcs.)
M5x65 Pan head screw (2
pcs.)
Note: The other M5 Hex
nut is in the back.
Volute case 1
Elbow
5x20 Tapping
screw (3 pcs.)
Compression
spring 20
Threaded rod of Volute case 1
Tank holder
17 / 41

6-7-2 Assembling
Assemble by reversing the disassembly procedure.
Fig. 6-7-1-4
[7] Remove O ring 93 from Elbow.
Fig. 6-7-1-5
[8] Remove 4x18 Tapping screw, and remove Pressure pipe
from Volute case 1.
Note: Be sure not to lose Flat washer 4.
O ring 93
Apply Makita grease
FA No.2.
Elbow
Pressure pipe
Flat Washer 4
4x18 Tapping screw
Volute case 1
Fig. 6-7-1-6
[9] Remove Frame holder from Volute case 2.
[10] Remove four M6x40 Hex socket head bolts, and
remove Impeller.
Fig. 6-7-1-7
[11] Remove six M6x30 Hex socket head bolts, and remove
Volute case 2 and Engine.
[12] Remove Base L and Base R from Volute case 2.
Impeller
Volute case 2
M6x40 Hex socket
head bolt
(4 pcs.)
Frame
holder
Base R
Volute case 2
M6x30 Hex
socket head bolt
(6 pcs.)
Fig. 6-7-2-1
The order of tightening screws is as follows:
(1)
(2)
(9)
(3)
(4)
(5)
(6)
(7)
(8)
(10)
(11)
5x20 Tapping
screw (9 pcs.)
Volute case 1
Elbow
M5x65 Pan head screw (2
pcs.)
Note: The other M5 Hex
nut is in the back.
Engine
Base L
18 / 41

6-8 Frame section
6-8-1 Disassembling
6-8-2 Assembling
Assemble by reversing the disassembly procedure.
Fig. 6-8-1-1
Remove six M4x25 Pan head screws, and remove Guard from Frame complete.
Guard
Frame complete
M4x25 Pan head
screw (6 pcs.)
19 / 41

6-9 Ignition system
6-9-1 Checking plug cap
[1] Remove Plug cap from Spark plug, then check the continuity between Plug cap spring and the ground (earth) terminal of
Ignition coil with 1R402-A. (Fig. 6-9-1-1)
[2] If there is no or intermittent continuity, check the continuity between Ignition cable and Plug cap spring by following the steps
described below.
(1) Apply spray lubricant in Plug cap, pull out Plug cap by turning it. (Fig. 6-9-1-2)
(2) Check if Plug cap spring is properly connected to Ignition cable. If not, connect them properly.
Also check Plug cap for any crack. If Plug cap is cracked, replace it with a new one.
(3) Insert Plug cap spring in the center of Ignition cable. Then using small pliers, put them back into Plug cap carefully not
to disconnect Plug cap spring from Ignition cable.
(4) Make sure that Plug cap spring is firmly connected to Ignition cable by doing the same as you did in step (1).
6-9-2 Checking Spark plug
Fig. 6-9-2-1
Fig. 6-9-1-1
Fig. 6-9-1-2
Plug cap
Ground (earth)
terminal or
metal part of
the machine
Spark plug
Plug cap spring
(located in Plug
cap)
Ignition cable
Ignition coil
Plug cap
Plug cap
spring
High voltage
cable
Spray lubricant
WARNING!!
· When a spark is produced, high-voltage current is delivered from Ignition coil to Spark plug. Therefore, it is very dangerous to
pull Recoil starter knob with your hand on Ignition cable. Be sure to keep your hands off from Ignition cable when checking
for spark.
· Fuel is extremely flammable and fuel vapors are explosive. Therefore, clean up spilled fuel before starting to check for spark.
Also, be careful not to do the check near Carburetor.
[1] Remove Plug cap from Spark plug, then Spark plug
from Cylinder head complete with the supplied socket
wrench.
Note: If the electrodes of Spark plug are wet, wipe them with
a rag then dry them with an air blower.
[2] Using a wire brush, carefully clean up carbon deposits
from the electrodes and the ceramic insulator around the
center electrode.
[3] Adjust the electrode gap to 0.6 to 0.7mm by inserting
0.7mm Feeler gauge set of 1R366 into the gap and
carefully bending the side electrode.
Electrode gap
must be 0.6 to
0.7mm.
Center electrode
Side electrode
20 / 41