Zenoah SRTZ2500 manual Maintenance Chart, MA1 Blades MA1,  20 

9. 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
ENGINE	idle adjusting screw	see ■ADJUSTING	✔				replace carburetor
		IDLING SPEED (p.18)					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	✔
SHAFT	cutting parts	replace if	✔
		something's wrong
	gear case	grease		✔
	screws/nuts/bolts	tighten/replace	✔			✔	not adjusting screws

MA1

■BLADES (MA1)

•When refilling the tank or resting, it is often a good idea to use the time to oil the cutting blades.

•If a gap exists between the upper and lower blades, follow the procedure below to adjust them so that they fit more closely together.

1.Loosen lock nut (A) as shown in the diagram.

2.Tighten screw (B) fully, and then turn one-third to one-half of a rotation backward.

3.While holding onto the screw to keep it in position, tighten the lock nut.

4.Check to make sure that the flat washer (C) is loose enough so that it may be turned by pressing on it with a finger.

(1) Upper blade (2) Lower blade

NOTE

Screwing in the screw too tightly may make it impossible for the blades to move. Conversely, not screwing in the screw tightly enough may make the blades of the trimmer feel dull and cause leaves and branches to become caught in the blades of the trimmer.

20 