Zenoah HB250 manual Maintenance Chart, AIR Cleaner, Cleaning AIR Filter, Fuel Filter

Maintenance

Maintenance, replacement, or repair of the emission control device and systems may be performed by any non-road engine repair establishment or individual.

■ MAINTENANCE CHART

			every	every	every
			25	50	100
system/compornent	procedure	before	hours	hours	hours	note
		use	after	after	after
fuel leaks, fuel spillage	wipe out	✔
fuel tank, air filter, fuel filter	inspect/clean	✔	✔			replace, if necessary
idle adjusting screw	see ■ADJUSTING	✔				replace carburetor
	IDLING SPEED (p.11)					if necessary
spark plug	clean and readjust			✔		GAP: .025in(0.6~0.7mm)
	plug gap					replace, if necessary
cylinder fins, intake air cooling vent	clean		✔
muffler, spark arrester, cylinder exhaust port	clean			✔
throttle lever, ignition switch	check operation	✔
screws/nuts/bolts	tighten/replace	✔			✔	not adjusting screws

WARNING

•Make sure that the engine has stopped and is cool before performing any service to the blower. Contact with rotating blower fan or hot muffler may result in a personal injury.

■AIR CLEANER

•Check the air cleaner every 25 hours of use or more frequently if used under dusty conditions. A clogged air filter may increase fuel consumption while cutting down the engine power. Never operate the blower without the air filter or with a deformed filter element because unfiltered dusty air will quickly ruin the engine.

CLEANING AIR FILTER:

Clean the filter element in warm, soapy water as required. Dry completely before installing. If the element is broken or shrunk, replace with a new one.

Air Filter

■FUEL FILTER

•A clogged fuel filter may cause poor acceleration of the engine. Check periodically to see if the filter is clogged with dirt. The filter can be taken out of the fueling port using a small wire hook. Disconnect the filter assembly from the fuel pipe and unhook the retainer to disassemble it. Clean the components with gasoline.

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