Makita EB5300TH Operating instructions

April 2017
Ver.1
PETROL BLOWER
EB5300TH (TUBE-MOUNTED THROTTLE)
EB5300THG (TUBE-MOUNTED THROTTLE)
EB5300WH (HIP-MOUNTED THROTTLE)
REPAIR MANUAL

2 / 71
1CONTENTS
1CONTENTS .............................................................................................................................................................2
2SAFE HANDLING OF THE MACHINE................................................................................................................3
3REPAIR ....................................................................................................................................................................3
3-1 Necessary repairing tools..................................................................................................................................3
3-2 Gaskets and lubrication.....................................................................................................................................4
4REPAIR WORK.......................................................................................................................................................6
4-1 Before starting repair work...............................................................................................................................6
4-1-1 Draining fuel tank, removing Pipes and Nozzle.......................................................................................6
4-2 Blower Section..................................................................................................................................................7
4-2-1 Removing Band complete L/R and Cushion.............................................................................................7
4-2-2 Removing Frame, Compression spring 22 (Damper spring), Fan 243 and Front volute case..................8
4-3 Recoil starter...................................................................................................................................................11
4-3-1 Disassembling Recoil starter ..................................................................................................................11
4-3-2 Disassembling/Assembling of Spiral spring...........................................................................................13
4-3-3 Assembling Recoil starter.......................................................................................................................14
4-3-4 Disassembling Fuel tank.........................................................................................................................16
4-3-5 Assembling Fuel tank .............................................................................................................................17
4-3-6 Disconnecting Control cable...................................................................................................................18
4-4 Control lever...................................................................................................................................................19
4-4-1 Disassembling Control lever (for Model EB5300TH)............................................................................19
4-4-2 Assembling Control lever (for Model EB5300TH)................................................................................21
4-4-3 Disassembling Control arm (for Model EB5300WH)............................................................................23
4-4-4 Assembling Control arm (for Model EB5300WH).................................................................................26
4-5 Engine section.................................................................................................................................................28
4-5-1 Disassembling Engine.............................................................................................................................28
4-5-2 Disassembling Muffler ...........................................................................................................................29
4-5-3 Assembling Muffler................................................................................................................................29
4-5-4 Disassembling Engine (continued).........................................................................................................30
4-5-5 Disassembling Carburetor.......................................................................................................................32
4-5-6 Assembling Carburetor...........................................................................................................................33
4-5-7 Disassembling Air Cleaner plate.............................................................................................................35
4-5-8 Assembling Air Cleaner plate.................................................................................................................35
4-5-9 Disassembling Engine (continued).........................................................................................................36
4-5-10 How to use 1R181 Ignition checker........................................................................................................44
4-5-11 Important steps in assembling Engine ....................................................................................................47
4-5-12 Assembling Blower section to Engine section........................................................................................58
4-5-13 Connecting Control cable to Blower body (for Model EB5300WH).....................................................60
4-5-14 Connecting Control cable to Blower body (for Model EB5300TH).......................................................61
4-6 Key points of completion inspection ..............................................................................................................65
5TIGHTENING TORQUE SPECIFICATIONS.......................................................................................................66
6CIRCUIT DIAGRAM ............................................................................................................................................67
6-1 EB5300WH (Hip throttle model) ...................................................................................................................67
6-2 EB5300TH (Tube throttle model)...................................................................................................................67
7WIRING DIAGRAM .............................................................................................................................................68
7-1 Lever case or Arm section ..............................................................................................................................68
7-1-1 EB5300TH (Tube throttle model)...........................................................................................................68
7-1-2 EB5300WH (Hip throttle model)............................................................................................................69
7-2 Front volute case section.................................................................................................................................70
7-2-1 Routing of Corrugated tube ....................................................................................................................71

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2SAFE HANDLING OFTHE MACHINE
Read the instruction manual of this product and follow the instructions for safe repair.
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 MATERIALKEEP FIRE
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 an impact driver.
Tighten the bolts and the screws to the specified torque as shown in "5 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.
3REPAIR
3-1 Necessary repairing tools
Code No.
Description
Use for
1R005
Retaining ring pliers RT-2N
attaching/removing Cotter (Use with 1R389.)
1R014-A
Hex head bit H3-150
loosening/tightening M4 Hex socket head bolts
1R015-A
Hex head bit H4-150
loosening/tightening M5 Hex socket head bolts
1R016-A
Hex head bit H5-150
removing Muffler
1R070
Tachometer
checking engine speed
1R127
Air density tester
checking Carburetor
1R181
Ignition checker
checking Ignition coil
1R288
Screwdriver magnetizer
attaching/removing Cotter
1R310
Spring pin extractor 6.0
inserting Check valve
1R311
Retaining ring pliers
removing/inserting tubes
1R364
Flywheel puller
removing Flywheel
1R366
Feeler gauge set
adjusting gaps of Spark plug, Rocker arm, and
Ignition coil
1R372
Crank shaft lock bolt M10
locking Crankshaft
1R389
Cotter removal attachment
attaching/removing Cotter (Use with 1R005.)
1R402-A
Digital tester
checking Switch
1R402-B
Alligator clip set for tester
use with 1R402-A

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3-2 Gaskets and lubrication
When you remove Gasket, be sure to remove gasket residue.
When reassembling the machine, replace Gaskets with new ones.
Use parts cleaner or the like to remove grease from the mating surface of Cylinder and Crankcase and then apply
Liquid gasket ThreeBond 1215.
Fig. 1
Note
When removing grease, do not directly spray parts cleaner to the rubber portion. Be sure to soak a rag with parts
cleaner and remove grease.
Surface where ThreeBond 1215
should be applied
Oil passage
Note
Liquid gasket should not be come into
here.

5 / 71
When attaching Flywheel, use parts cleaner or the like to remove the grease from the tapered portion.
Lubricant
Amount
Makita grease FA. No.2
a little
4-stroke engine oil
a little
Fig. 2
Outer
circumference of
Cam lifter
Outer circumference of Push
rods
Tips of valves and sliding
portion of Valve stem
Sliding parts inside the engine,
Sealing lips of Oil seals
Remove grease.

6 / 71
4REPAIR WORK
4-1 Before starting repair work
4-1-1 Draining fuel tank, removing Pipes and Nozzle
1Remove Fuel tank cap assembly, and then
drain Fuel tank.
Tips
Drain Carburetor as much as possible by pushing
Primer pump repeatedly.
Drain the oil when the machine is disassembled down
to Engine block. (Refer to Fig. 60.)
Fig. 3
2Remove Intermediate pipe (Long pipe or Short pipe)
from Swivel pipe complete [1].
Fig. 4
3Remove M5x30 Thumb screw [2] fastening Control
lever ass’y [1].
Fig. 5
4Loosen Hose clamp 100 [1] to remove Cable holder [2]
and Flexible pipe [3]. Control lever ass’y can now be
removed.
[3]
[1]
[2]
[2]
[1]
[1]

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4-2 Blower Section
4-2-1 Removing Band complete L/R and Cushion
As for the REPAIR WORK of Cam gear, Muffler, Air cleaner plate, Carburetor, Insulator and Ignition coil, refer to
4-5-1.
Fig. 6
1Release Buckle [1] on Band complete from the top of
Frame as follows: with a tool such as long-nose pliers,
turn Buckle 90 degrees, then pull it out through the slot
of Frame. Release the other three Buckles from the
bottom of Frame in the same way.
Fig. 7
2Lock rivet [1] fastening Band complete to Frame can
be removed by turning the center lock pin [2] of the
rivet counterclockwise with a Phillips screwdriver to
lift up the pin.
Tips
If the center lock pin [2] spins freely and cannot be
lifted up, turn the pin while lifting up Band complete
as shown on the left. (Remember this tip also when
removing Cushion.)
Lock rivet [1] can be removed from Band complete.
If it is removed, however, be careful not to lose the
center lock pin [2] because the pin will become easy
to fall off and get lost.
Fig. 8
3Remove Cushion [1] from Frame by removing four
Lock rivets [2] with a Phillips screwdriver; first
remove the two rivets indicated by arrow 1, then
remove the two indicated by arrow 2.
1
2
[1]
[2]
1
2
[1]
[2]
[1]
[1]

8 / 71
4-2-2 Removing Frame, Compression spring 22 (Damper spring), Fan 243 and Front volute case
Fig. 9
1Remove Frame by removing six M5x16 Hex socket
head bolts [1] as shown on the left.
Note
To prevent the engine section from falling down, put
the machine on a workbench with the Recoil starter
side down.
In the case of 5300WH, before removing Frame [2],
it is necessary to disconnect Control cable and Lead
unit from the engine section and to remove Control
arm. (Refer to 4-4-3.)
Do not fail to remove the two bolts fastening Fuel
tank.
Fig. 10
2Remove four Compression springs 22 (damper springs)
[1] by turning them counterclockwise.
Note
Two different Compression springs 22 are used:
Two black ones [2] on the Cushion side of Frame
Two silver ones [3] on the bottom side of Frame
Be careful not to mix up the two springs.
Fig. 11
3Remove ten 5x20 Tapping screws [1] to remove Rear
volute case [2]. Elbow [3] is removed at the same time.
Note
Remove the screws located on both sides of Elbow [3]
last of all to prevent Elbow [3] from falling down.
[3]
[2]
[1]
[1]
[2]
[3]
[2]
[1]
[1]

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Fig. 12
4Remove four M6x25 Hex socket head bolts [1] to
remove Fan 243 [2].
Fig. 13
5Remove three M5x20 Hex socket head bolts [1] to
remove Recoil starter [2].
Fig. 14
6Remove five 5x20 Tapping screws [1] to remove
Engine cover complete [2].
7Remove Plug cover [3].
Fig. 15
8Disconnect two Straight terminals [1] of Lead unit.
Note
When you pull off Straight terminal [1], do not hold the
lead wire of Lead unit or the wire will be broken. Be sure
to slide the cover tube and hold the metal body of the
terminal.
[1]
[1]
[3]
[2]
[1]
[1]
[2]
[2]
[1]

10 / 71
Fig. 16
9Remove two 4x14 Tapping screws [2] fastening
Control cable [1], and remove two Strain relieves [3].
Fig. 17
10 Loosen two M5x20 Thumb screws [1] to remove Air
cleaner cover [2] andAir cleaner element [3].
Fig. 18
11 Remove Fuel tube 3-370 (black) [1] from Carburetor
[2] with 1R311.
Fig. 19
12 Remove Fuel tube 3-370 (clear) [1] from Primer pump
[2], and then remove Fuel tank.
Fig. 20
13 Remove two 5x20 Tapping screws [1].
[1]
[2]
[1]
1R311
1R311
[1]
[2]
[1]
[2]
[3]
[2]
[3]
[1]

11 / 71
Fig. 21
14 Remove six M6x25 Hex socket head bolts [1] to
remove Front volute case [2].
4-3 Recoil starter
4-3-1 Disassembling Recoil starter
1Follow Fig. 13 to remove Recoil starter.
Note
Be sure to wear leather gloves to protect your hands.
Fig. 22
2Pull Starter knob [3] approximately 200mm, then hold
Reel [1] so that it does not rotate back and then pull out
Starter rope [4] from the triangular gap between Recoil
starter [2] and Reel [1].
Fig. 23
3Hook Starter rope [1] on the U-shaped notch of Reel
[2], and then turn Reel [2] clockwise to release the
tension from Spiral spring.
Note
Once the tension is released from Spiral spring, do not
turn Reel [2] clockwise any further or Spiral spring will
be deformed.
Fig. 24
4Remove Set screw [1] to remove Collar [2], Swing arm
[3] assembly and Friction spring [4].
[1]
[2]
[3]
[4]
[1]
[2]
[4]
[3]
[1]
[2]
[1]
[2]
[1]

12 / 71
Fig. 25
5Remove two Swing arms [1] from Collar [2].
[1]
[2]

13 / 71
4-3-2 Disassembling/Assembling of Spiral spring
Fig. 26
1Take Reel [2] out of Recoil starter [1].
Tips
Remove Reel [2] carefully so that the inside end of Spiral
spring [3] is removed from Recoil starter [1] and placed
in Reel [2].
Fig. 27
2When Spiral spring [1] is removed for repair or
accidentally pops out of Reel [2], fit it back in place as
follows:
1Hook the outer end of the spring into the notch [3] of
Reel [2].
2Rewind the spring.
Tips
When rewinding Spiral spring [1], keep pressing it down
to prevent it from popping out.
3Apply Makita grease FA No.2 to the whole portion of Spiral spring.
[2]
[1]
[3]
[2]
[1]
[3]

14 / 71
4-3-3 Assembling Recoil starter
Fig. 28
1Pass one end of Starter rope [1] through Starter knob
[2] and Rope stopper [3], and then tie a knot in the end
of the rope.
Note
Be sure to wear leather gloves to protect your hands.
Face the protruding side of Rope stopper [3] towards
Starter knob [2].
Tie the knot in Starter rope [1]. Each length (a)
should be approximately 10mm.
2Wind the other end of Starter rope on Reel, leaving approximately 200mm unwound.
Fig. 29
3Put Reel [1] into Recoil starter [3]. When assembling
them together, be sure to look in the center hole of Reel
[1] to engage the inner end of Spiral spring [2] with the
hook of Recoil starter [3].
Fig. 30
4Install Friction spring, and then fasten Collar and
Swing arm assembly to Reel with Set screw [1].
[1]
[1]
[2]
[3]
[2]
[1]
[3]
a
a

15 / 71
Fig. 31
5Hook Starter rope [1] on the U-shaped notch of Reel
[2], and then turn Reel [2] counterclockwise at least
three turns to increase the tension on Spiral spring.
Note
Do not turn Reel [2] clockwise or Spiral spring will be
deformed.
6Unhook Starter rope from the U-shaped notch to let Reel wind up Starter rope into Recoil starter.
Fig. 32
7Make sure that Starter rope [1] is wound up with an
optimum tension.
Note
Starter knob [2] should get upright by itself if you let go
of it, and Reel should turn approximately one more turn
even after Starter rope [1] is pulled to the full.
Fig. 33
8Check Swing arms for correct operation.
They should be raised when you pull Starter knob [1],
and should be lowered down back to the initial position
when you release Starter knob [1].
[1]
[1]
[1]
[2]
[1]
[2]

16 / 71
4-3-4 Disassembling Fuel tank
Fig. 34
1Remove Fuel tank cap assembly [1] and Tube guard
20-102 [2].
Note
Be careful not to break Cap holder [3] of Fuel tank cap
assembly [1]. Be sure to hook your finger on Cap holder
[3], and then pull it out of Fuel tank.
Fig. 35
2Push Grommet [1] into Fuel tank [2] with a Phillips
screwdriver or the like, and then pull Tubes out of the
fuel filler opening with 1R311.
Note
Be sure to clean Grommet [1].
[1]
[2]
[1]
[2]
[3]

17 / 71
4-3-5 Assembling Fuel tank
Fig. 36
1Pass Tubes through Grommet.
Fig. 37
2With a slotted screwdriver, assemble Grommet [1] to
Fuel tank.
Note
The clear Tube should be placed to the fuel filler opening
side, and all the three Tubes should be on the red dotted
line.
Fig. 38
3Install Tube guard 20-102 [1] and Fuel tank cap
assembly [2].
[1]
[2]
[1]
145mm
165mm

18 / 71
4-3-6 Disconnecting Control cable
1Disconnect two Straight terminals and remove two Strain relieves. (Refer to Fig. 15 and Fig. 16.)
Fig. 39
2With a slotted screwdriver, pry up the locking tab to
remove Carburetor cover [1].
Fig. 40
3Turn Throttle [1] clockwise and hold it there with your
finger. Then remove the end of Control cable from
Swivel [2], and then pull it off from Adjust screw [3].
[1]
[2]
[3]
[1]

19 / 71
4-4 Control lever
4-4-1 Disassembling Control lever (for Model EB5300TH)
1According to 4-1-1, remove M5x30 Thumb screw.
Fig. 41
2Remove five 4x18 Tapping screws [1] to remove Lever
case R [2].
Fig. 42
3Remove Throttle lever A [1] and Compression spring 4
[2] from Lever case L [3], and then disconnect the
barrel nipple of Control cable from Throttle leverA
[1].
Fig. 43
4Release the corrugated tube, and remove Leaf spring A
[1]/ B [2] with long-nose pliers.
Tips
Remove Flag receptacles while releasing lock with a
slotted screwdriver or the like.
Fig. 44
5Remove M4x20 Hex socket head bolt [1] to remove
Throttle link [2] and Throttle lever B [3]. In this step,
Flat washer 12 [4] is also removed.
[1]
[2]
[3]
[4]
[1]
[2]
[1]
[2]
[3]
[1]
[2]

20 / 71
6Pull Control cable and Lead unit out of Corrugated
tube.
Tips
First, pull out the wire of Control cable, and then one by
one, pull out the two lead wires (with Straight terminal)
of Lead unit.