Dolmar MS-250.4, MS-251.4 instruction manual Operating time

Operating time	Before	After	Daily				Shutdown	Corres-po
				30h	50h	200h
	operation	lubrication	(10h)				/rest	nding P
Item
Inspect/clean	○							11
Engine oil
Replace					○*1			17

Tightening parts	Inspect	○							19
(bolt, nut)
	Clean/inspect	○							―
Fuel tank
	Drain fuel							○*3	20
Throttle lever	Check function		○						13
Stop switch	Check function		○						13
Cutting blade	Inspect	○	○						9
Low-speed rotation	Inspect/adjust		○						15
Air cleaner	Clean		○						18
Ignition plug	Inspect		○						19
Cooling air duct	Clean/inspect		○						19
	Inspect		○						19
Fuel pipe
	Replace					◎*2			―
Gear-case grease	Refill			○					19
Fuel filter	Clean/replace				○				19
Clearance between air intake	Adjust					◎	*2		―
valve and air discharge valve
Engine overhaul						◎*2			―
Carburetor	Drain fuel							○*3	20

*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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