Makita BHX2500 instruction manual Fault location

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			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			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, have it 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 STOP-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
Operating time		Before		After	Daily	30h	50h	200h	Shutdown	Corres-po
Item		operation		lubrication	(10h)				/rest	nding P
Engine oil	Inspect/clean	○								10
	Replace						○*1			15
Tightening parts	Inspect	○								17
(bolt, nut)
Fuel tank	Clean/inspect	○								―
	Drain fuel								○*3	17
Throttle lever	Check function			○
Stop switch	Check function			○						13
Low-speed rotation	Inspect/adjust				○					13
Air cleaner	Clean				○					16
Ignition plug	Inspect				○					16
Cooling air duct	Clean/inspect				○					17
	Inspect				○					17
Fuel pipe
	Replace							◎*2		―
Fuel filter	Clean/replace						○			17
Clearance between air intake	Adjust							◎*2		―
valve and air discharge valve
Oil tube	Inspect							◎*2
Engine overhaul								◎*2		―
Carburetor	Drain fuel								○*3	17

*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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