Models No. EK7650H, EK7651H

Description Power Cutters 305mm (12"), 355mm (14")

CONCEPT AND MAIN APPLICATIONS

Models EK7650H and EK7651H are the world???s first 4-stroke power cutters. Their main features are:

???Low fuel consumption, low noise and clean exhaust emission achieved by 4-stroke engine

???Easy start-up with Automatic decompression, Primer pump and

On/off choke combination switch with automatic half-throttle lock

???Low-vibration system with damper springs to absorb vibration from engine to integrated front and rear handles.

Each wheel diameter is:

305mm (12") for model EK7650H 355mm (14") for model EK7651H

Dimensions: mm (")

Specification

Standard equipment

Tool kit (Socket wrench 13-16, Hexalobular wrench, Slotted screwdriver and Tool bag)

Oil bottle (containing 220ml engine oil)

Water supply kit

Adapter ring (for some countries only)

Note: The standard equipment for the tool shown above may vary by country.

Optional accessories

Filter set

Trolley kit

Oil bottle set (10 bottles of 220ml engine oil)

Diamond wheel

Abrasive cut-off wheel

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Repair

CAUTION: Repair the machine in accordance with ???Instruction manual??? or ???Safety instructions???.

Warning: Follow the instructions described below in advance before repairing:

???Wear gloves.

???Remove the cutting tool from the unit.

???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 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 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.

[1] NECESSARY REPAIRING TOOLS

[2] GASKET

Once Gasket is removed:

(1)Clean up the mating surface where the gasket was installed to maintain its sealing performance.

(2)Replace it with a new one.

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epair

[3] LUBRICANT/ ADHESIVE APPLICATION

Apply the following grease/ oil to protect parts and product from unusual abrasion.

Note: After assembly, supply 220cc of 4-cycle engine oil from the inlet of machine before trial run.

When disassembling the engine, put ThreeBond 1215 to the matching surface of Crank case and Cylinder block. (Fig. 66)

Cylinder block

133

134

Starter assembly

Crankcase

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Repair

[4] DISASSEMBLY/ASSEMBLY [4]-1. V-belt 5-800, Cutting device

DISASSEMBLING

(1)Loosen two M8 Hex nuts slightly with Wrench 13-16 of a standard accessory. (Fig. 2)

(2)Release the tension on V-belt 5-800 by turning M6 Tensioning screw counterclockwise with Screwdriver. The position of M6 square nut shows the tension level; as it comes close to the minus mark, the belt tension is relieved. (Fig. 2)

(3)When Water supply set is on the machine, remove it. (Fig. 3)

Holder (Fig. 2) can be removed from Belt cover by turning clockwise/ counterclockwise to 90?? .

(4)Remove two M8 Hex nuts, then separate Belt cover and Hood section from the machine. (Fig. 4)

(5)When Hood section is disassembled:

1.Face the blade installation side of Spindle toward the ram of Arbor press.

2.Press Spindle out of Cutting device. Ball bearing 6203LLU is removed together with Spindle. (Fig. 5)

(6)Remove Retaining ring R-40 from Cutting device with 1R291, and then press the other 6203LLU out of Cutting device. (Fig. 6)

Water supply set

Holder

Belt cover

M6 Tension screw

M8 Hex nut (2 pcs.)

Cutting device

Hood section

V belt 5-800 Belt cover

M8 Hex nut (2 pcs.)

Fig. 6

Ball bearing 6203LLU

Arbor press

Spindle

Cutting device

Note: Another Ball bearing 6203LLU and Retaining ring R-40 are left in Cutting device as drawn

in Fig. 6.

One of Ball bearing 6203LLU

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Repair

[4] DISASSEMBLY/ASSEMBLY

[4]-1. V-belt 5-800, Cutting device (cont.)

ASSEMBLING

Assemble their parts by reversing the disassembly procedure.

(1)Assemble one of Ball bearing 6203LLU to Cutting holder, then snap Retaining ring R-40 into the groove of Cutting device to secure the bearing.

(2)Insert Spindle into the other Ball bearing 6203LLU, then assemble them to Cutting device until they stop.

Note: Use two 1R030 as drawn in Fig. 7 so that their inner retainers of Ball bearings 6203LLU can be held without load to the other portions.

This retains the proper tensions to their inner retainers.

(3)Insert Lock shaft into the place of Cutting device, then set Sliding disc and Impact plate. Push Lock shaft from Belt cover side toward Blade installation side until the top bumps against Impact plate. (Fig. 8)

(4)Belt tension must be adjusted by turning M6 Tension screw clockwise until M6 Hex nut is aligned to a line between plus mark and minus mark. (Fig. 9.)

(5)Holder of Water supply set can be set to Belt cover by turning clockwise/ counterclockwise to 90?? .

Fig. 7

1R030 to hold the inner retainer of Ball bearing 6203LLU

1R030 to hold the inner retainer of Ball bearing 6203LLU

Fig. 8

[Belt cover side]

Impact plate

Align the flat end of Impact plate to that of Hood complete.

Lock shaft

[Blade installation side]

Fig. 9

Holder

Belt cover

M6 Tension screw

Repair

[4] DISASSEMBLY/ASSEMBLY

[4]-2. Starter assembly

DISASSEMBLING

(1)Loosen three M5x19 - Hexalobular socket head bolts, then remove Starter assembly. (Fig. 10)

(2)When Starter rope is not broken;

1.Make a slack of Starter rope then hook it on U-shaped notch of Reel. (Fig. 11)

2.Be sure to loosen the spiral spring force by turn Reel clockwise to spin Starter rope around Reel before the step (3). (Fig. 11)

(3)Loosen M6x20 Set screw with Phillips screwdriver No. 3. (Fig. 11)

(4)When Reel is removed from Starter case, insert a index finger carefully to the reverse side of Reel and then remove Reel from Starter case with Spiral spring attached. (Fig. 12.)

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Fig. 10

M5x19 - Hexalobular socket head bolt (3 pcs.)

Starter assembly (gray portion)

ASSEMBLING

(1)If Spiral spring pops out of Reel, put it back in place by setting

the outer end of Spiral spring in place in Reel first, then by winding

Spiral spring counterclockwise towards the center of Reel. (Fig. 13)

(2)Apply a little amount of Makita grease N No.2 to the whole surface of Spiral spring.

(3)Put Starter rope through Starter case complete.

After passing the one end through Starter knob and Rope stopper, tie the end as drawn in Fig. 14. Then cover the top of Starter knob with Cap.

After passing the other end from the hole of Starter case to Reel, tie the end in Reel.

(4)Wind Starter rope around Reel for the 2/3 length (When the whole length is 1m, wind 66cm.)

(5)While setting the inner end of Spiral spring into the center slot of Starter case, assemble Reel to Starter case properly.

(6)Tighten M6x20 Set screw with Phillips screwdriver No. 3. (Fig. 11)

(7)Make a slack of Starter rope then hook it on U-shaped notch of Reel. (Fig. 11) Turn Reel counterclockwise to spin Starter rope around Reel.

Important: Make sure that the proper spring force is effective to Starter assembly by turning Starter knob by hand and it can be returned back to the original position. (Fig. 15)

Even if Starter rope is pulled to the full, there is room to rotate Reel because of Spiral spring performance.

Fig. 13

Reel

Fig. 14

Fig. 15

Set the outer end of

Spiral spring here.

Spiral spring

Cap

Rope stopper

Starter knob Hole of Starter case

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Repair

[4] DISASSEMBLY/ASSEMBLY

[4]-3. Clutch, Ratchet

DISASSEMBLING

(1)Remove Cutting device. Refer to the clause of [4]-1.

(2)Loosen three M5x12 Hexalobular socket head bolts, then remove Clutch cover together with Starter assembly. (Fig. 16)

(3)Loosen three M5x16 Hexalobular socket head bolts with 1R290 and Cordless impact driver, and remove Ratchet complete. (Fig. 17)

(4)Remove M10-17 Hex lock nut by turning it counterclockwise by using Cordless impact driver with Socket bit.

(5)Turn the hexagonal portion of Clutch holder clockwise by using Cordless impact driver with Socket bit.

Clutch complete is removed.

Note: Clutch holder has a left hand thread.

(6)Remove Clutch drum assembly by hand. No tools are required. Remove Retaining ring R-35 from Clutch drum with 1R005. Press down Ball bearing 6003LLU in Clutch drum.

Fig. 16

Clutch cover

Starter assembly

U-shaped notch of Reel

M5x12 Hexalobular socket head bolt (3 pcs.)

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DISASSEMBLING FLYWHEEL COMPLETE

(1)Loosen four M5x30 - Hexalobular socket head bolts, then remove Fan cover. (Fig. 22)

(2)Remove M10 Flange nut from Crankshaft by turning counterclockwise

by using Cordless impact driver with 14mm flats width Socket bit. (Fig. 23)

(3) Mount 1R364 on Flywheel complete, then put Screwdriver through the center shaft of IR364. (Fig. 24)

(4)While holding the one of M6 bolts and center bolt with Water pump pliers to prevent 1R364 from being rotated, turn Screwdriver clockwise.

When Flywheel is removed from Crankshaft, a snap sound is heard because of their tapered fit.

M5x30 - Hexalobular socket head bolt (4 pcs.)

M6 bolt of 1R364

Water pump pliers

(1)Remove grease from Crankshaft complete.

(2)After aligning the key slot of Flywheel complete with Woodruff key in the keyway of Crankshaft complete, mount Flywheel complete onto Crankshaft complete. (Fig. 25)

(3)Assemble the rest by reversing the disassembly procedure.

Woodruff key in key way of

Crankshaft complete

Key slot of

Flywheel complete

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Repair

[4] DISASSEMBLY/ASSEMBLY

[4]-4. Flywheel, Ignition coil (cont.)

DISASSEMBLING IGNITION COIL

(1)Loosen M6x15 Thumb screw, then remove Top cover. (Fig. 27)

(2)Loosen four M5x40 Hexalobular socket head bolts, then remove Filter cover complete (Fig. 28) and Air filter. (Fig. 29)

(3)Loosen M5x16 Hexalobular socket head bolt, then remove Cylinder cover. Remove Plug cord of Ignition coil assembly from Cylinder cover. (Fig. 30)

(4)Remove Flag terminal on Lead unit end from Ignition coil with care to the breaking of Lead unit.

Note: It is recommend to apply ???the principle of leverage.??? Without being forced to pull, put the long noses of Pliers on the edge of Ignition coil and lever up the flag terminal. (Fig. 31)

(5)Loosen two M5x16 Hexalobular socket head bolts, and then remove Ignition coil. Refer to Fig. 26. Important: Unless the disassembling is necessary for repair, do not touch the bolts of Ignition coil.

In case of disassembling them, the hard work ???ADJUSTMENT THE GAP BETWEEN

IGNITION COIL AND FLYWHEEL??? will be required.

Air filter

5.5x20 Hexalobular tapping screw
Grip cover
Fig. 32
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Repair

[4] DISASSEMBLY/ASSEMBLY

[4]-5. Carburetor

(1) After completion of the steps (1) and (2) on [4]-4, remove Grip cover by loosening 5.5x20 Hexalobular tapping screw. (Fig. 32)

(2) Loosen two M5x45 Hexalobular socket head bolts, then remove Carburetor and Filter gasket from Carburetor mount. (Figs. 33 and 34)

Note: Use 1R311 to hold/ pinch Tubes to lever it up for easy removing.

Do not use the sharp edged Pliers that causes damage to Tubes. (Fig. 35)

(3) Remove Contact spring. (Fig. 36)

(4)Carburetor WT can be disassembled as shown in Fig. 37.

Note: ??? Check the components??? shrinkage, hardening or breakage due to aged deterioration. If any, replace it with a new one.

???Carburetor for some countries is different from Carburetor WT. (Fig. 37) The components cannot be supplied individually because of the regulation for compliance with standards.

(5)Before mounting the inner parts of Pump body assembly in place, make sure that the tip of Inlet needle valve is neither worn nor deformed.

Note: The inner parts are not available individually. If you need some of the inner parts, order Pump body assembly.

(6)Make sure that Inlet screen is not clogged, then set it back in place.

(7)Spray carburetor cleaner in all the fuel lines of Carburetor, then after several minutes, wash out dirt and debris with clean gasoline.

Filter bracket

M5x45 Hexalobular socket head bolt

Fig. 35

Fig. 36

Tank complete

Contact spring

Fig. 37

Inner parts of Pump body assembly

Metering lever pin Screw

Metering Spring lever

Inlet needle valve

Screw assembly (4 pcs.)

Metering cover

assembly

Metering diaphragm

assembly

Metering diaphragm gasket

Inlet screen

Limiter cap

Pump body assembly

Pump diaphragm

Pump gasket

Pump body assembly

Spring

Idle adjust screw Screw

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Repair

[4] DISASSEMBLY/ASSEMBLY

[4]-5. Carburetor (cont.)

ADJUSTMENT OF CARBURETOR AFTER REPLACEMENT

Pull throttle lever fully after a while engine running at idle position. When there is Fig. 38 a problem with the engine quick acceleration, adjust H needle (Fig. 38) as follows:

(1)Warm up the engine by pulling the throttle lever fully for one minute.

(2)Keep engine idling and do fine adjustment of the idling speed by turning

Fix the assembled part drawn in Fig. 39 with Lead wire holder in Tank complete

Fig. 41

Repair

[4] DISASSEMBLY/ASSEMBLY

[4]-6. Throttle lever

DISASSEMBLING

(1)Remove Pin 5 from the grooves on Tank complete by levering it up with a slotted screwdriver. (Fig. 42)

(2)Expand the hinge portion for Throttle lever on Tank complete with 1R003. (Fig. 43)

Throttle lever section can be removed as drawn in Fig. 44.

Throttle lever

Lock off lever

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Fig. 42

Pin 5

[4]-7. Engine block

DISASSEMBLING

Note: ??? It is highly recommended to drain the oil system of Engine block before starting disassembling because the oil remaining there will drip out to delay your operation.

???When Piston section is repaired, it is necessary to remove Engine from Tank complete.

(1)Remove Hood section. Refer to Fig. 4 of [4]-1.

(2)Remove Carburetor. Refer to [4]-5.

Refer to Fig. 45 and do the following steps (3), (4), (5).

(3)Remove three Tubes??? ends that come from Cylinder block complete as follows:

???Tube 3-170 with Clamp to Rocker cover

???Tube 3-130 to Hose joint in Seal

???Tube 3-75 to Hose joint in Seal

(4)Remove Tube 5-70 with Clamp from Rocker cover.

(5)Loosen Hose clamp 30 then remove Suction line from Cylinder block complete.

Fig. 45

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Repair

[4] DISASSEMBLY/ASSEMBLY

[4]-7. Engine block (cont.)

DISASSEMBLING

(6) Remove four M6x30 Hexalobular socket head bolts that fasten Front handle, Tank complete and Engine. (Fig. 46) Engine block can be removed. (Fig. 47)

Fig. 46

Fig. 47

Front handle

Engine block

Tank complete

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Repair

[4] DISASSEMBLY/ASSEMBLY

[4]-8. Engine

DISASSEMBLING

(1)Remove Clutch complete and Clutch drum. Refer to [4]-3.

(2)Remove Flywheel. Refer to [4]-4. If necessary, remove Ignition coil.

(3)Loosen five M6x25 Hexalobular socket head bolts, then remove Cutting arm from Cylinder block complete. (Fig. 48)

(4)Remove Exhaust muffler from Cylinder block complete.

Note: Although Spark arrester can be removed from Exhaust muffler, it is not permitted to replace Spark arrester only because it functions as the integrated part with Exhaust muffler.

(5) Remove Oil case from Cylinder block complete. (Fig. 49)

Note: Unless you repair Exhaust valves, Cam lifters, and Rocker arms, do the following steps. It is not necessary to remove Cylinder block from Crank case (Fig. 49)/ Carburetor from Cylinder block complete (Refer to Fig. 34.)

(6)Remove two M6x20 Hexalobular socket head bolts on the upper side of Exhaust muffler.

Remove two M5x25 Hexalobular socket head bolts then separate Rocker cover complete from Cylinder head complete. (Fig. 50)

(7)Loosen Hose clamp then remove Suction line from Cylinder head complete. (Refer to Fig. 41)

(8)Remove Cylinder head complete from Cylinder block, then pull out two Push rods. (Fig. 51)

Note: Do not failure to mix them up. It is recommend to distinguish Exhaust push-rod and Intake push-rod.

(9)Remove Cam gear cover (Fig. 52).

(10)Remove Cam lifter L and Cam lifter R. Then, remove Cam gear complete by pulling out Pin 5. (Fig. 53)

Fig. 50

Fig. 51

M6x35 Hexalobular socket head bolt (4 pcs.)

Cylinder head complete

Push rod (for exhaust system) Push rod (for intake system)

Cylinder block

Cam gear cover

M5x16 Hexalobular socket head bolt (4 pcs.)

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Repair

[4] DISASSEMBLY/ASSEMBLY

[4]-8. Engine (cont.)

DISASSEMBLING

Note: Cam gear assembly functions as automatic decompression valve system.

Valve is slightly open to release the compressed air in Engine at the starting time, before moving fly weight by centrifugal effects. It means the insufficient setting of Cam gear assembly will cause engine stall/ extreme reaction force at engine running due to too much load by the compressed air.

(11)Remove Pin 5 that sets Rocker arm assembly in place on Cylinder head complete. (Fig. 54) Use 1R308 to push out Pin 5.

The distinction of Rocker arm assembly and Push rods (for use of the exhaust system/ intake system) enables you shortens the repair process (Gap adjustment between Rocker arms and Retainers is even difficult, however, you can adjust it by using 1R366. Refer to Fig. 68.

Fig. 54

Pin 5

Cylinder head complete

Important: Disassemble the parts in the room on Cylinder head complete before removing it and clean the clogged portions in the following steps. You may repair successfully without doing the step (5) and later in the next page.

(1)Remove Rocker cover complete, then push out Pin 5 on hinge for Rocker arms with 1R308 and remove Rocker arms. (Refer to Figs. 50 and 54)

(2)Remove Spark plug. Turn Flywheel until Piston comes to the upper dead point by looking through Spark plug hole on Cylinder head complete.

Note: Align the rib as a mark on Flywheel with the rib on Cylinder block as drawn in Fig. 55.

(3)Insert a bent Lead wire #16 into Combustion chamber through Spark plug hole so that Valves do not fall into Combustion chamber. (Fig. 56)

(4)While compressing Compression spring 11 by pushing Retainer with 1R003 attached with 1R389, remove Cotter by a thin bit magnetized by 1R288.

Routes in Cylinder head complete, the upper surface on Valves and the room on Cylinder head complete can be clean through removal of four Cotters, two Retainers, and two Compression springs 11.

Fig. 55

Rib on Cylinder block

[viewed from the upper side of the room]

Fig. 57

Retainer (2 pcs.)

Cotter (4 pcs.)

Compression

spring 11 (2 pcs.)

Cylinder head complete

Note: Intake valve has to be close to this hole of Cylinder head complete.

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Repair

[4] DISASSEMBLY/ASSEMBLY

[4]-8. Engine (cont.)

DISASSEMBLING

Important: When Intake/ Exhaust valves have to be replaced, remove Cylinder head complete. (Refer to previous page.)

(5)Loosen eleven Hexalobular socket head bolts on the bottom of Crank case (Fig. 58), then remove Crank case from Cylinder block. As Liquid gasket makes Cylinder block stick on Crank case, insert and twist a slotted screwdriver between the clearance. (Fig. 59)

Scrape away Liquid gasket on the mating surface.

(6)Pull out the assembled part of Crank shaft and Piston from Cylinder block. (Fig. 60)

(7)Remove one of Ring spring 12 with a thin slotted screwdriver, then push Piston pin from the opposite with care so as not to damage the other Ring spring 12. (Fig. 61)

The following parts mentioned in Fig. 62 can be replaced individually. When the rest parts have to be replaced, Crankshaft complete is required.

Woodruff key 4

Oil seal 17 Piston

Insert a thin slotted screwdriver from the depression on the rib around Piston pin hole.

Slotted screwdriver

Cylinder block

Ring spring 12

Oil seal L

Flat washer 41

Crankshaft

complete*

*The components cannot be supplied individually.

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Repair

[4] DISASSEMBLY/ASSEMBLY

[4]-8. Engine (cont.)

ASSEMBLING ENGINE BLOCK

Note: Be sure to apply Makita grease N No.2/ 4-cycle engine oil in accordance with [3] LUBRICANT APPLICATION.

(1)Connect Piston with Crankshaft complete by inserting Piston pin into place; there is no front/back to Piston.

(2)Secure Piston pin by mounting Ring spring 12 onto each end of Piston pin.

Note: The ring gap of Ring spring 12 can be positioned at any angle to Piston pin.

(3)Install Oil ring in the grooves of Piston; Side rail first, Spacer next, then the other Side rail.

Important: Be sure to fit the three rings with the ring gaps at 120 degrees to one another as shown in the left of Fig. 63.

(4)Install Second ring first then Top ring in the groove of Piston.

Important 1: Be sure to fit the two rings with the ring gaps at 180 degrees to each other as shown in the right of Fig. 63.

Important 2: Second ring has a taper face and must be installed with the large diameter facing Oil ring. (Fig. 64)

Distinguishing between Top ring and Second ring & Discriminating the larger diameter of Second ring:

If both of the two rings are new and unused,

???You can distinguish from their appearances; there is a red marking on the side face of Second ring as shown in Fig. 65 while not on the side face of Top ring.

???You can face the large diameter of Second ring by placing Second ring with the red marking on your right and with the ring gap near you as shown in Fig. 65.

If both of the two rings are used and the white marking of Second ring is rubbed off, carefully press the side face of the two rings to the inner wall surface of Cylinder. You will be able to distinguish the two rings or to discriminate the large diameter of Second ring through the differences in contact feelings that the different side faces make.

(4) Remove oil/grease from the mating surface of Cylinder block and Crankcase.

Then apply ThreeBond 1215 to the mating surface of Crankcase as shown in Fig. 66. Note: ThreeBond 1215 must not be applied to Oil supply routes.

Apply 4-cycle engine oil to the cylinder portion of Cylinder block, and then while compressing Piston rings, mount Cylinder block onto Crankcase.

(6)Tighten eleven Hexalobular socket head bolts in a crisscross pattern. (Refer to Fig. 58.)

(7)Do not forget to set Exhaust port spacer in place on Muffler installation side of Cylinder head complete. (Fig. 67)

Fig. 63

Second ring

red marking

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Repair

[4] DISASSEMBLY/ASSEMBLY

[4]-8. Engine (cont.)

DISASSEMBLING

(8)Assemble Cam gear section by reversing the disassembly procedure. (Refer to Fig. 53 and 52.)

(9)Move Piston to the upper dead point in Cylinder block by turning Crankshaft slowly and carefully by hand.

(10)Adjust the gap between Rocker arms and Exhaust valve section/ Intake valve section as follows:

A.Put 0.1mm or 0.15mm leaf of 1R366 on Valve section. (Fig. 68)

B.While holding M5x9 Hex nut by Wrench 8, turn M5 Hex socket head bolt with Hex wrench 2.5. (Fig. 68)

C.Check the gap.

(11)After pretightening the nuts and bolts, turn Crankshaft complete by hand to move Crank portion two or three turns, check the gap again, if the proper gap is obtained, tighten the nuts and bolts firmly.

(12)Lead unit that comes from Stop switch has to be fastened to Cylinder block with 6x30 Hexalobular socket head bolt. (Fig. 69)

(13)Plug cord and Tube have to be fixed with Lead wire holders on Cylinder cover. (Fig. 70) And then, Plug cord has to be fixed with Lead wire holders on Cylinder cover to route it without slacking toward Flywheel. (Fig. 71)

Lead unit connected with Ignition coil has to be fixed with the Lead wire holders as drawn in Fig. 71.

Lead wire holders on Cylinder cover

Plug cord and

Tube

P 19/ 19

Repair

[4] DISASSEMBLY/ASSEMBLY

[4]-9. Ignition system (cont.)

CHECKING SPARK PLUG

WARNING !!

???When a spark is produced, high-voltage current is delivered from Ignition coil to Spark plug. It is, therefore, 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 (if any) from the electrodes and the ceramic insulator around