Makita EK7651H User Manual

24
Maintenance chart
Item Inspecting Regularity
Engine oil Inspection/clean Before commencing work
Replace Initially, after 20 operating hours, and
subsequently every 30 operating hours
Wheel, tightening bolt, hood Visual inspection Before commencing work
Throttle system Functional check Before commencing work
Air lter Gently tap or replace. Monthly (every 50 operating hours)
Dust bag lter Clean or replace. Weekly (every 20 operating hours)
Prelter Rinse off coarse dirt in running water or
replace, and apply oil.
Daily (every 8 operating hours)
Spark plug Visual check
…
Clean, adjust, or replace Implement as you think proper
V-belt Visually inspect status of wear (take
care about excessive tension at time of
replacement).
Before commencing work
Fuel tank lter Visually inspect, and replace depending on
level of dirtiness.
Implement as you think proper
Nuts and bolts Visually inspect, and correct. Before commencing work
Be sure to use designated and genuine parts and consumables.•
Fault location
Fault System Observation Cause
Cutting disc does not
start turning
Clutch Engine runs Damage to clutch
Engine does not start
or with difculty
Ignition system Ignition spark O.K. Fault in fuel supply or compression system, mechanical defect
No ignition spark STOP-switch operated, wiring fault or short circuit, spark plug or
connector defective, ignition module faulty
Fuel supply Fuel tank lled Incorrect choke position, carburetor defective, fuel supply line bent or
blocked, fuel dirty
Compression system No compression when
pulled over
Cylinder bottom gasket defective, crankshaft seals damaged, cylinder
or piston rings defective or improper sealing of spark plug
Mechanical fault Starter not engaging Broken starter spring, broken parts inside of the engine
Clutch Contamination
adheres to clutch and
around parts
Ratchet spring contaminated and opened, have it cleaned
Warm start problems Carburetor Tank lled, ignition
spark existing
Carburetor contaminated, have it cleaned
Engine starts, but dies
immediately
Fuel supply Tank lled Incorrect idling adjustment, suction head or carburetor contaminated
Fuel tank vent defective, fuel supply line interrupted, cable or STOP-
switch faulty
Insufcient
performance
Several systems may
simultaneously be
affected
Engine idling poor Air lter contaminated, carburetor contaminated, mufer clogged,
exhaust duct in the cylinder clogged

Makita EK7651H Specifications

General

Depth	780 mm
Width	310 mm
Height	455 mm
Weight	12900 g
Product type	Petrol abrasive saw
Product color	Black, Blue
Sound power level	104.6 dB
Cutting speed	80 m/s
Blade diameter	350 mm
Idle speed (max)	4300 RPM
Cutting depth (90º)	122 mm
Sound pressure level	92.7 dB
Sound level uncertainty	2.5 dB
Engine type	4-stroke engine
Engine power	4.1 hp
Uncertainty K	2 m/s²
Fuel tank capacity	1.1 L
Vibration emission	2.7 m/s²
Engine displacement	75.6 cm³
Arbor diameter	20 mm
Idle speed (min)	9100 RPM
Anti-vibration system	Yes
Engine number of strokes	4
Air filtration stages quantity	5
Motor power	4.5 hp
Power source	Gasoline
Motor rated power	3.3 kW