Makita EK7651H, EK7650H dimensions DISASSEMBLY/ASSEMBLY 4-8. Engine, Lead unit

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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.

Fig. 68

Fig. 69

1R366

 

Hex wrench 2.5

 

Wrench 8

Lead unit

 

M6x30

M5 Hex

Hexalobular

socket

socket head

head bolt

bolt

M5x9

 

Hex nut

 

Fig. 70

Fig. 71

 

Plug cord

 

Lead unit

Lead wire holders on Cylinder cover

Plug cord and

Tube

Terminal of Ignition coil

Lead wire holders

on Cylinder cover

Image 18
Contents Specification Optional accessoriesStandard equipment Necessary Repairing Tools RepairEpair LUBRICANT/ Adhesive ApplicationBelt 5-800, Cutting device DisassemblingAssembling Starter assembly Clutch, Ratchet Adjustment the GAP Between Ignition Coil and Flywheel Flywheel, Ignition coilDisassembling Flywheel Complete Disassembling Ignition Coil Carburetor Adjustment of Carburetor After Replacement Throttle lever Engine blockDISASSEMBLY/ASSEMBLY 4-7. Engine block Engine Arm has to be close to Repair Oil ring Assembling Engine BlockDISASSEMBLY/ASSEMBLY 4-8. Engine Lead unitTightening torque specifications Ignition systemChecking Spark Plug

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.