Makita EK7650H, Instruction 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 filter

Gently tap or replace.

Monthly (every 50 operating hours)

Dust bag filter

Clean or replace.

Weekly (every 20 operating hours)

Prefilter

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 filter

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 difficulty

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 filled

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 filled, ignition 

spark existing

Carburetor contaminated, have it cleaned

Engine starts, but dies 

immediately

Fuel supply

Tank filled

Incorrect idling adjustment, suction head or carburetor contaminated

Fuel tank vent defective, fuel supply line interrupted, cable or STOP-

switch faulty

Insufficient 

performance

Several systems may 

simultaneously be 

affected

Engine idling poor

Air filter contaminated, carburetor contaminated, muffler clogged, 

exhaust duct in the cylinder clogged