Dolmar HT-2249 D, Instruction Manual

Page: 15 / 128

15
STORAGE
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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.
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Remove the spark plug and add a few drops of oil into the spark plug hole.
Then, pull the starter gently to confirm that oil film covers the engine inside
and tighten the spark plug.
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Clear dirt or dust from the cutter blade and outside of engine, wipe them with
a oil-immersed cloth and keep the machine at 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
Throttle lever
Safety lock key
I-O switch
Functional check
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)
Every 20 hours
Gear case Supply of grease
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
Ignition system Ignition spark is present Faulty fuel supply or compression system, mechanical defect Engine not starting or
under difficulties
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, suction head (gas
line filter) dirty, fuel supply line bent or interrupted
Inside of engine Cylinder bottom gasket defective, crankshaft seals damaged,
cylinder or piston rings defective
Compression
Outside of engine 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
Incorrect idling adjustment, suction head or carburetor
contaminated
Engine starts but dies
immediately
Fuel supply Tank filled
Fuel tank vent defective, fuel supply line interrupted, cable or
I-O switch faulty
Insufficient
performance
Several
systems may
simultaneously
be affected
Engine idling Air filter contaminated, carburetor contaminated, muffler clogged,
exhaust duct in the cylinder clogged