Makita RBC421L, Original Instruction

Page: 19 / 112

19
STORAGE
– When keeping the machine in storage for a long time, drain fuel from the fuel
tank and carburetor, as follows: Drain all fuel from the fuel tank. Dispose of
properly and in accordance with all local laws.
– Remove the spark plug and add a few drops of oil into the spark plug hole.
Then, pull the starter gently, so that oil covers the engine inside and tighten
the spark plug.
– Clear dirt or dust from the cutter blade and outside of engine, wipe them with
a oil-immersed cloth and keep the machine in a place as dry as possible.
Maintenance schedule
General Engine assembly, screws and
nuts Visual inspection for damage and tightness
Check for general condition and security
After each refuelling Control lever
I-O switch Functional check
Functional check
Daily Air filter
Cooling air duct
Cutting tool
Idling speed
To be cleaned
To be Cleaned
Check for damage and sharpness
Inspection (cutting tool must not move)
Weekly Spark plug
Muffler
Inspection, replace if necessary
Check and if necessary clean the opening
Quarterly Suction head
Fuel tank
To be replaced
To be cleaned
Shuting down procedure Fuel tank
Carburetor Empty fuel tank
Operate until engine runs out of fuel
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 I-O 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, must be cleaned
Engine starts but dies
immediately Fuel supply Tank filled Incorrect idling adjustment, carburetor contaminated
Fuel tank vent defective, fuel supply line interrupted,
cable or I-O 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
Drain fuel
Humidity