Dolmar PE-251 instruction manual Storage, Maintenance schedule, Fault location

STORAGE

–When the machine is 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 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. Drain fuel Humidity

–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	Visual inspection for damage and tightness
	nuts	Check for general condition and security
After each refuelling	Control lever	Functional check
	I-O switch	Functional check
Daily	Air filter	To be cleaned
	Cooling air duct	To be cleaned
	Cutting blade	Check for damage and sharpness
	Idling speed	Inspection (cutting blade must not move)
Weekly	Spark plug	Inspection, replace if necessary
	Muffler	Check and if necessary clean the opening
Quarterly	Suction head	To be replaced
	Fuel tank	To be cleaned
Shuting down procedure	Fuel tank	Empty fuel tank
	Carburetor	Operate until engine runs out of fuel

Fault location

Fault	System	Observation	Cause
Engine not starting or with	Ignition system	Ignition spark O.K.	Fault in fuel supply or compression system, mechanical
difficulty			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	Cylinder bottom gasket defective, crankshaft seals
		pulled over	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	Carburetor contaminated, must be cleaned
		existing
Engine starts but dies	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	Engine idling poor	Air filter contaminated, carburetor contaminated, muffler
	may simultaneously		clogged, exhaust duct in the cylinder clogged
	be affected

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