Makita EB7650TH [20/172] Fault location

Makita EB7650TH [20/172] Fault location
20
Fault location
Fault System Observation Cause
Engine not starting 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 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
Warm start problems Tank filled ignition spark
existing
Carburetor contaminated, have it cleaned
Engine starts but dies Fuel supply Tank filled Incorrect idling adjustment, 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
Operating time
Item
Before
operation
After
lubrication
Daily
(10h)
30h 50h 200h
Shutdown/
rest
Corresponding
Page
Engine oil
Inspect/clean
10
Replace
*1
17
Tightening parts (bolt,
nut)
Inspect
19
Fuel tank
Clean/inspect
Drain fuel
*3
19
Throttle trigger/
throttle lever
Check function
Stop control lever/
stop switch
Check function
13
Low-speed rotation Inspect/adjust
14
Air cleaner Clean
18
Ignition plug / plug cord Inspect
18
Cooling air duct Clean/inspect
19
Fuel pipe
Inspect
19
Replace
*2
Fuel filter Clean/replace
19
Clearance between
air intake valve and air
discharge valve
Adjust
*2
Oil tube Inspect
*2
Engine overhaul
*2
Carburetor Drain fuel
*3
19
*1 Perform initial replacement after 20h operation.
*2 For the 200 operating hour inspection, request Authorized Service Agent or a machine shop.
*3 After emptying the fuel tank, continue to run the engine and drain fuel in the carburetor.

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