Makita EM4351UH ユーザーズマニュアル

Follow the instructions described below in advance before repairing:

• Wear gloves.

• Remove the cutting tool from the unit, and if it is a saw blade, attach the blade cover to the blade.

• 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. 

• 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 "[4]-15. 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.

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Description

Code No.

Use for

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. 

(1) Apply a little amount of Makita grease N No. 2 to Spiral spring in Recoil starter and the spline ends of Shaft in 

      Shaft pipe complete.

(2) When the inside of Gear case is cleaned, supply 11g of Makita grease N No. 2 from the grease inlet.

(3) Apply 4g of Makita grease N No. 1 to the entire portion of Shaft in Shaft pipe complete.

(4) Once Engine is disassembled, remove oil/grease from the mating surface of Cylinder and Crankcase complete, 

      then apply ThreeBond 1215/1216 to the mating surface for the reassembly. 

Retaining ring pliers ST-2 for External ring

1R004

press-fitting Cutter shaft set into Ball bearing 6000DDU

press-fitting Clutch drum into Ball bearing 6004LLU/6003LLU

Bearing setting pipe 20-12.2

1R028

removing Spiral bevel gear 14 from Ball bearing 609ZZ

Bearing setting pipe 28-20.2

1R031

removing/ installing Retaining rings 

Retaining ring pliers RT-2N for Internal ring

1R005

removing/ installing Cotter by using 1R389

removing Ball bearing 6000DDU from Cutter shaft complete

Bearing setting plate 10.2

1R033

removing Ball bearings

Gear extractor (Large)

1R045

Retaining ring pliers RT-2E for Internal ring

1R006

removing/ installing Retaining rings

Air density tester

1R127

diagnosing Carburetor

Round bar for arbor 20-100

1R247

removing Clutch drum complete from Clutch case

Round bar for arbor 8-50

1R282

removing Spiral bevel gear 14 from Ball bearing 6000ZZ and 

6000

removing Piston pin

Round bar for arbor 12-50

1R286

press-fitting Clutch drum complete into Clutch case

Retaining ring S and R pliers

1R291

removing/ installing Retaining rings

Torque wrench shaft 7-23N.m

tightening Bolts to specified torque

1R219

Torque wrench shaft 2-6N.m

1R254

Flywheel puller

1R364

removing Flywheel

Feeler gauge set

1R366

adjusting Ignition coil, Spark plug

Cotter removal attachment

1R389

removing/ installing Cotter by using 1R005

10mm Hex socket bit

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removing/ installing Flywheel

14mm Hex socket bit

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removing/ installing Clutch

Wire brush

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cleaning Spark plug