10/15-Hour Maintenance

Clean the spark plug and check the gap at

0.024–0.028 inchthe electrode. (0.6–0.7 mm)

Figure 19

50-Hour Maintenance

	Every 50 hours of operation (more fre-	 Use a hooked wire to extract the fuel filter
	quently in dusty or dirty conditions):	from inside the fuel tank. See Figure 22.
	n Remove the cylinder cover and clean	Remove and replace the filter element.
		Before reinstalling the new filter ele-
	grass and dirt from the cover and
		ment, inspect the condition of all the
	cylinder fins.
		fuel system components (fuel pick-up
	n Remove the cutting attachment, cutting
		line, fuel return line, tank vent line, tank
	attachment holder and gear shaft collar.
		vent, fuel cap and fuel tank). If damage,
	Remove the filler plug from the side
		splitting or deterioration is noted, the
	of the gearcase and press new grease
		unit should be removed from service
	into the gearcase until grease is pushed
		until it can be inspected or repaired by a
	out. Use only lithium-base grease such
		Shindaiwa-trained service technician.
	as Shindaiwa Gear Case Lubricant or

	equivalent. See Figure 20.

Old			New
Old			Grease
Grease			Grease
Grease
			Hooked
			Wire
		Blade	Output
		Blade	Shaft Collar
			Filter Element
Shaft	Bolt	Holder	Holder
Bolt	Guard	A	B
Figure 20			Figure21

Every 10 to 15 hours of operation:

nRemove and clean the spark plug. Adjust the spark plug electrode gap to 0.024 0.028 inch (0.6-0.7 mm). If the spark plug must be replaced, use only an NGK CMR5H or equivalent resistor type spark plug of the correct heat range. See Figure 19.

NOTE:

The NGK CMR5H also meets the require- ments for electro magnetic compliance (EMC).

CAUTION!

Before removing the spark plug, clean the area around the plug to prevent dirt and debris from getting into the engine’s internal parts.

Gearcase Index

Screw

Flexible Shaft

Shaft Tube

Figure 22

3.Slide the gearcase and shield assembly from the shaft tube.

4.Pull the flexible shaft from the shaft tube assembly, and clean the shaft thoroughly in solvent.

5.Inspect the shaft carefully, and replace if worn or damaged. If flexible shaft is worn and needs replacement, liner should also be replaced.

6.Coat the entire length of the shaft with Shindaiwa Premium Gearcase Lube (or equivalent), and reinstall the shaft in the shaft tube assembly.

NOTE:

For extended shaft life, the flexible cable should be reversed end-for-end during the

CAUTION!

Make sure you do not pierce the fuel line with the end of the hooked wire. The line is delicate and can be dam- aged easily.

Lubricate the Flexible Shaft.

Lack of lubrication will cause rapid wear to the flexible shaft and also to the shaft tube liner, resulting in increased vibration and greatly decreased service life. Remove and lubricate the flexible shaft as follows:

1.Loosen the gearcase clamp screw.

2.Remove the gearcase index screw.

reinstallation process.

7.Insert the flexible shaft into the female end of the gearcase pinion.

8.Install the gearcase on the shaft tube in the reverse order of removal.