Necessary Repairing Tools | Makita EK7651H, EK7650H specification

P 2/ 19

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

Code No.	Description	Use for
1R003	Retaining ring pliers ST-2N for External ring	removing Lock off lever
1R005	Retaining ring pliers RT-2N for Internal ring	removing Cotter

1R030	Bearing setting pipe 25-17.2	press-fitting Ball bearing 6203LLU into Cutting device

1R223	Torque wrench shaft 20-90N·m	assembling Clutch complete to Crankshaft
1R224	Ratchet head 12.7 (for 1R223)	assembling Clutch complete to Crankshaft
1R224	Ratchet head 12.7 (for 1R223)

1R288	Screwdriver magnetizer	removing/ assembling Cotter
1R290	Hexalobular bit VT-27 (6.35mm)	removing/ assembling Hexalobular bolt
1R291	Retaining ring S and R pliers	removing/ installing Retaining ring R-40
1R308	Spring pin extractor 4.0	removing Pin 5 from Rocker arm assembly

1R311	Retaining ring pliers	removing Tubes
1R364	Flywheel puller	removing Flywheel

1R366	Feeler gauge set	adjusting the gap between Ignition coil and Flywheel,
1R366	Feeler gauge set	Rocker arm assembly and Valve section, Spark plug
		Rocker arm assembly and Valve section, Spark plug
1R372	Crank shaft lock bolt M10	holding the position of Piston/ preventing Crankshaft from
1R372	Crank shaft lock bolt M10	being rotated
		being rotated
1R389	Cotter removal attachment	removing Exhaust / Intake valve system

---	Socket/ Socket bit 17	removing/ installing Clutch

---	Socket/ Socket bit 24	removing/ installing Clutch
---	Wire brush	cleaning Spark plug

---	Hex wrench 2.5	assembling/ removing / adjusting M5 Hex socket head bolt
---	Wrench 8	holding M5x9 Hex nut

[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.

EK7650H, EK7651H specifications

The Makita EK7650H and EK7651H are robust and powerful cut-off saws designed for professional contractors and construction workers. These models are ideal for cutting through concrete, masonry, asphalt, and other tough materials with precision and efficiency. Their advanced engineering and innovative features set them apart in the competitive landscape of power tools.

One of the standout features of both models is the 4-stroke engine technology, which provides a significant reduction in emissions and noise compared to traditional 2-stroke engines. This makes them environmentally friendly while also allowing for longer operating times without the need for frequent fuel refills. The powerful 6.6 HP engine delivers exceptional cutting performance, enabling users to tackle even the most challenging jobs.

The EK7650H and EK7651H are equipped with a “Fast Start” technology that allows for easy starting, reducing the effort required to get the saw up and running. This is especially useful for users who need to work quickly and efficiently on-site. Additionally, the saws feature an automatic choke that enhances starting reliability in various weather conditions.

Comfort and usability are central to the design of these models. The dual anti-vibration technology minimizes vibrations during operation, significantly reducing user fatigue. The ergonomic handle provides a secure grip, allowing for greater control during cutting tasks. This is particularly beneficial for prolonged use in demanding work environments.

Another key characteristic of the Makita EK7650H and EK7651H is their versatility. They are designed to accommodate various blade sizes, which gives users flexibility in choosing the right blade for specific applications. The saws also feature an integrated dust management system that helps keep the work area clean, enhancing visibility and safety.

Both models come with an adjustable cutting depth feature, enabling users to achieve precise cuts for various materials. The easy-to-access air filter and fuel system ensure simple maintenance, extending the life of the saws.

In summary, the Makita EK7650H and EK7651H are powerful, efficient, and user-friendly cut-off saws that cater to the needs of professional users. With their advanced features, including a 4-stroke engine, ergonomic design, and versatility in blade sizes, these saws are indispensable tools for anyone looking to perform cutting tasks with precision and ease.