RedMax CHT2250 manual Maintenance

CHT2250

8. 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
	System/components	Procedure		25	50	100	Note
			Before	hours	hours	hours
			use	after	after	after
	fuel leaks, fuel spillage	wipe out	✔
	fuel tank, air filter, fuel filter	inspect/clean	✔	✔			replace, if necessary
ENGINE	idle adjusting screw	see adjusting	✔				replace carburetor
		idling speed					if necessary
	spark plug	clean and readjust			✔		GAP : 0.6 ~ 0.7 mm
		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	✔
SHAFT	cutting parts	replace if	✔
		something’s wrong
	gear case	grease		✔
	screws/nuts/bolts	tighten/replace	✔			✔	not adjusting screws
	debris guard	make sure to attach	✔

MA1

WARNING

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

■AIR FILTER

•The air filter, if clogged, will reduce the engine performance. Check and 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. (MA1)

(1) Air filter

MA3

.025 in

0.655mm

specified by RedMax. (MA3)

•REPLACEMENT PLUG IS CHAMPION RCJ6Y OR NGK BPMR7A.

IMPORTANT

•Note that using any spark plug other than those designated may result in the engine failing to operate properly or in the engine becoming overheated and damaged.

•To install the spark plug, first turn the plug until it is finger tight, then tighten it a quarter turn more with a socket wrench.

MA2

US-12

■FUEL FILTER

•When the engine runs short of fuel supply, check the fuel cap and the fuel filter for blockage. (MA2)

(1) Fuel filter

■SPARK PLUG

•Starting failure and mis-firing are often caused by a fouled spark plug. Clean the spark plug and check that the plug gap is in the correct range. For a replacement plug, use the correct type

TIGHTENING TORQUE:

87~121 in-lbs

(9.8~13.7 N.m.)

■MUFFLER

WARNING

•Inspect periodically, the muffler for loose fasteners, any damage or corrosion. If any sign of exhaust leakage is found, stop using the machine and have it repaired immediately.

•Note that failing to do so may result in the engine catching on fire.