Makita EB7650TH Handbuch

Models EB7650TH/ EB7650THG/ EB7650WH arePetrol blowers equipped with

75.6cm³ 4-stroke engine in compliance with strict exhaust emission regulations.

These products are ideal for professional use with the following features:

• Higher air speed and larger air volume than our current model BBX7600

for excellent operation efficiency

• 4 damper springs mounted betweenthe engine and the backpack frame

that reduce vibration on the back of operator even during long hours

of operation to reduce operator stress and fatigue

• Cushioning back padding and shoulder straps well-ventilated for effective

sweat evaporation to providemore comfort

Model EB7650TH features tube-mounted throttle while EB7650WH features

hip-mounted throttle. Model EB7650THG is E25 compatible.

Dimensions: mm (“)

Length (L)

332 (13-1/8)

Width 1 (W1)

460 (18-1/8)

Width 2 (W2)

510 (20)

Height (H)

480 (18-7/8)

Model

Specification

EB7650TH/EB7650THG EB7650WH

Engine

Type

4-stroke, single-cylinder, air-cooled

(Makita EH075F1)

Displacement: cm³ (cu.in)

75.6 (4.6)

Fuel

Straightunleaded gasoline*1 (E0 to E10*2)

Max output: kW (PS)

2.7 (3.7) [at 7,000 minˉ¹]

Max torque: N.m

4.4 [at 5,000 minˉ¹]

Speed: minˉ¹ = rpm

at max output power

7,100

at no load

2,800

Engine oil

SAE10W-30,

Class SF or higher ofAPI Classification

(4-stroke engine oil for automobile)

Carburetor

Diaphragm

Starting

system

Easy start (Spring-assisted recoil starter)

Decompression valve

Yes

Spark plug

NGK CMR6A

Primer pump

Yes

Fuel tankcapacity: L(US oz)

1.9 (64)

Throttle location

Tube-mounted

Hip-mounted

Max air

speed:

m/s*3

Long pipe 90

End nozzle 90-60

89 (200)

End nozzle 90-70

81 (181)

Short pipe 90

End nozzle 90-60

90 (201)

End nozzle 90-70

81 (182)

Max air

volume:

m³/min*3

Long pipe 90

End nozzle 90-60

17 (607)

End nozzle 90-70

19 (682)

Short pipe 90

End nozzle 90-60

17 (611)

End nozzle 90-70

19 (682)

Dry weight: kg (lbs)

10.8 (23.8)

11.0 (24.3)

*1 "Straight" means "not mixed with engine oil". *2 EB7650THG: E25 *3Actual measured value

Oil bottle set*4 Flexible pipe End nozzle 90-60 Long pipe 90

Box wrench 16 Swivel pipe End nozzle 90-70

Driver Hose clamp Flat nozzle 90

*4 Withengine oil contained for some countries.

Note: The standard equipment may vary by country or model variation.

Short pipe 90 Hip belt set

ECHNICALINFORMATION

July 2015

OFFICIALUSE

forASC & Sales Shop

P1 /35

PRODUCT

EB7650TH/ EB7650THG/ EB7650WH

Petrol Blower

CONCEPTAND MAINAPPLICATIONS

Model No.

Description

pecification

tandard equipment

ptional accessories

EB7650TH/

EB7650THG

EB7650WH

P 2/ 35

Repair

CAUTION: Repairthe machine in accordance with “Instruction manual” or “Safety instructions”.

Index

[1] NECESSARYREPAIRINGTOOLS P 2

[2] GASKETSAND LUBRICATION P 3

[3] DISASSEMBLY/ASSEMBLY P 4-28

[3]-1. Warning P 4

[3]-2. Blower Section (Band CompletesL and R, Frame and Fan) P 4-9

[3]-3. Throttle Lever Section P10-12

[3]-4. Engine Section (RockerArm, Valve Portion, and Camgear Portion) P 13-17

[3]-5.AirCleaner Case P 17

[3]-6. Carburetor P 18-20

[3]-7. Flywheel P 21

[3]-8. Ignition System P 21-22

[3]-9. Crankcase P 23-27

[3]-10. Completion Inspection Check Points P 28

[1] NECESSARYREPAIRINGTOOLS

Code No. Description Use for

1R005 Retaining ring pliers RT-2N Attaching/removing Cotter (used together with 1R389)

1R070 Tachometer Engine speed check

1R181 Ignition checker Diagnosis of Ignition coil

1R229 1/4”hex. Shank bit for M5 Loosening/tightening M5 Hex socket head bolts

1R288 Screwdriver magnetizer Attaching/removing Cotter

1R306 Ring spring removing jig Attaching/removing Cotter

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

1R389 Cotter removal attachment Attaching/removing Cotter (used together with 1R005)

1R402-A Digital tester Diagnosis of Ignition coil

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[2] GASKETSAND LUBRICATION

・After removing the gaskets, completely remove any residue.

・When reassembling, replace the gaskets with new ones.

・Use parts cleaner orthe like to remove grease fromthe mating surface of Cylinder and Crankcase and then applyLiquid gasket

ThreeBond 1215 as drawn below

・Apply a small amount of 4-stroke engine oil to each part indicated by in the following diagrams when assembling the parts.

・Apply Makita grease NNo.2 to the sealing lips of Oil sealsand outer circumference of O rings 17 and 20 of the anti-icing valve portion

indicated by .

・Apply Makita grease N No.2 tothe outer circumference of the O ring of Elbow.

・When attaching Flywheel, use partscleaner or the like to remove the grease from the tapered part.

Tips of valves

Outer circumference of Camlifter

Outer circumference of Push rods

Outer circumference of O-rings 17

and 20 of the anti-icing valve portion

Remove grease.

Slidingparts insidethe engine

Sealing lips of Oil seals

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[3] DISASSEMBLY/ASSEMBLY

[3]-1. Warning

・There is a risk ofa burn injuryimmediately after the engine is stopped.So wait until the engine has completely cooled

before performing the work.

・Completely remove all fuel from the inside of Fuel tank and Carburetor before performing the work. [No open flames]

・Remove the engine oil before performing the work.

・Perform the work on a solid workbench in a place where dust, dirt, etc. will not enter inside.

・Remember how and where theparts were assembled whendisassembling the product andtake care not to make a mistake

when assembling the product.

Prepare boxes so that you can store the parts in groups when disassembling the product.

・Handle the removed parts carefully and clean and wash them properly.

・If a bolt or screw cannot be loosened, do not applyexcessive force. Use an impact driver or similar tool.

・Be sure to tighten bolts and screws to the specified tightening torque values.

・After assembling the main parts, turn the engine by hand to check that there is no abnormality or looseness.

[3]-2. Blower Section (Band CompletesL and R, Frame and Fan)

Disassembly

(1)Remove Band completes L and R and Hip belt. Remove each of the fixing parts as shown in Fig.1.

Fig.1

Pull out the band as shown above.

Position the buckle vertically

and then remove it.

Turn the center of Lock rivet with

a Phillips screwdriver to loosen it a

little and then remove it.

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P 5/ 35

(2) Loosen three M5x20 Pan head screws and then remove Recoil starter (a). (Fig.2)

(3) Loosen four 5x20Tapping screws and then remove Engine cover (b). (Fig.3)

(4)Remove six M5x16 Hex socket head bolts from the bottom and front of Frame (c). (Fig.4)

(5)Lift up Fuel tank and disconnect the earth wire of Ignition coil from the brass M5-10 Hex nut beneath Fuel tank. (Left photo of Fig.5)

(6) Disconnect Ignition coil at the bullet terminals(d) (Center photo of Fig.5),then disconnect Control cable (e) from Carburetor (f)

(Right photo of Fig.5), and then remove the integrated Control cable (e) and Lead unit from Front volute case (h). In the case of

EB7650WH, remove Control cable (e) from Clip (g). (Center photo of Fig.5)

(7)Remove the engine,Volute case and Fuel tank together and then replace Frame (c).

Fig.4

Fig. 2

(a)

Fig.3

(b)

(c)

Guard

(c)

Loosen this screw

onlywhen removing

Guard.

Fig.5

Disconnect (e) from (f).

(e)

2.Return Throttle

lever to its original

position and remove

the wire end.

1.Pull Throttle lever

and then hold it in

place with a finger.

(f)

Disconnect (e) from (d) and (g).

(d)

For Model EB7650WH,

remove (e) from(g).

(g)

Disconnect thewire from the

earth terminal.

M5-10 Hex nut

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P 6/ 35

(8)Turn four Compression springs 22 (the upper two are shorter than the lower two) used as vibration damper counterclockwise and then

remove them. (Fig.6)

(9)Loosen eleven 5x20Tapping screws and then remove Rear volute case (i). Remove Elbow (j) together with it. (Fig.7)

(10) Loosen the four M6x25 Hex socket head bolts and then remove fan (k). (Fig.8)

(j)

(i)

Fig.6

(h)

(k)

Upper

Lower

Fig.7

Fig.8

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P 7/ 35

Assembly

(1)Tighten the four fan fixing screws in a criss-cross pattern (the order shown in Fig.8).

(2)ScrewCompression springs 22 all the way onto Spring holders. The two shorter ones should be at the top (of Rear volute case) and the

two longer ones should be at the bottom (of Front volute case). (Fig.6)

If Rubber rings at the bottom have been removed, attach them as shown in the photo on the right of Fig.9and then screw the springs

onto Spring holders.

(3)Attach Elbow (a) with the protrusion positioned as shown in Fig.9so that you can rotate Elbowfrom the front

of the machine and then secure Rear volute case (b) with elevenTapping screws 5. (Fig.7)

(4)Attach Frame, then connect Carburetor to Control cable, then connect the bullet terminalsand earth wire of

Ignition coil and then secure Guard. (Figs.4and 5)

Place the bullet terminalsin place as shown in Fig.5 (d) while taking care that it will not become pinched

in the engine cover. Place corrugated tube (c) of Model EB7650THin place as shown in Fig.10.

Protrusion

(b)

Slide Rubber ringall the way onto each

Springholder with the flanged end ofthe

ring facing Front volute case.

(a)

(c)

Place the bullet terminalsand

line filter in this space, if used.

Fig.9

Fig.10

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P 8/ 35

(5)When fitting Engine cover complete (d), follow the instructions described in Fig.11.Make sure that Carburetor gasket is on the inner

side of the rib inside Engine cover complete and that Plug cover is not pinched.

Align the fixing screw boss positions and then fit the cover and secure it in place with the four screws. (Fig.3)

(6) Secure Band completesL and R with the fixing parts by reversing the disassembly procedure shown in Fig.1while taking care not to mix

them up.

Twist the bands;Band complete R by90 degreesclockwise and Band complete Lby 90 degrees counterclockwise viewed from the top,

and then attach them. (Fig.12)

Left

Right

Twist 90 degrees

Carry out disassembly and assembly

with Choke lever raised or t

he lever

will catchon the engine cover.

Insert along the guides

Recoil starter

Three M5x20

Pan head screws

(d)

Oil guard:

Attach before fitting Engine

cover complete.

Cylinder block

assembly

Choke lever

Four 5x20

Tapping screws

Fig.11

Fig.12

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P 9/ 35

(7) When the tubes havebeen disconnected fromFuel tank during disassembly, connect them as shown in Figs.13 and 14.

Outside of FuelTank

Cover the two tubes coming out of Fuel tank, individually, with Spiral tube 6-100, then cover

the tube of Breather (e) with the coil spring 8 and then slideTube guard 20-102 (f) all the way

to cover the tubes.

Fuel tank

Coil spring 8

(e)

Slide (f) all the way

to cover the tubes.

Spiral tube 6-100

Tube 3-370

(transparent blue)

Tube 3-370 (black)

Inside of Fuel Tank

Hose clamp

Filter

Tube 3-370

(black)

Tube 3-370

(transparent blue)

Slide (f) all the way

to cover the tubes.

Fig.13

Fig.14

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P 10/ 35

[3]-3.Throttle Lever Section

EB7650TH

Disassembly

(1) Remove M5x30 thumb screw (a). (Fig.15)

(2) Loosen five 4x18 Tapping screws and then remove Lever case R (b). (Fig.15)

(3) Remove the head of Control cable (c) from Throttle leverA(d) and then remove the lever. (Fig.15)

(4) RemoveThrottle link (e), disconnect the connector of Switch unit, and then replace Switch unit.

(5) Loosen M4x18 Hex socket head bolt and remove Throttle lever B (f). (Fig.16)

Assembly

・Attach Throttle link (e) at the position shown in Fig.16. First secure Throttle lever B (f) with the screw and then turn it counterclockwise

(viewed from the inside) to press the lever of Switch unit and then attachThrottle leverA(d).

(e)

(f) is on the back.

(a)

(b)

(d)

Lever case L

Switch unit

Fig.15

Fig.16

Makita Corporation

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