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10/15-hour maintenance, Hour maintenance – Shindaiwa 81604 User Manual

Page 12

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Every 10 to 15 hours of operation:

Remove and clean the spark plug. Adjust

the spark plug electrode gap to 0.04

0.08 inch (0.6-0.7 mm). If the spark

plug must be replaced, use only an

NGK BPMR6A or equivalent resistor

type spark plug of the correct heat

range. See Figure 19.

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.

10/15-Hour Maintenance

Figure 19

NOTE:

The NGK

BPMR6A

also meets the require-

ments for electro magnetic compliance (EMC).

Every 50 hours of operation (more

frequently in dusty or dirty conditions):

Remove the cylinder cover and clean

grass and dirt from the cover and cylin-

der fins.

Remove the cutting attachment, cutting

attachment holder and gear shaft collar.

Remove the filler plug from the side

of the gearcase and press new grease

into the gearcase until grease is pushed

out. Use only lithium-base grease such

as Shindaiwa Gear Case Lubricant or

equivalent. See figure 0.

50-Hour Maintenance

Use a hooked wire to extract the fuel filter

from inside the fuel tank. See figure 1.

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.
. Remove the gearcase index screw.
. Slide the gearcase and shield assembly

from the shaft tube.

4. Pull the flexible shaft from the shaft tube

assembly, and clean the shaft thorough-

ly 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

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.

Gearcase Index

Screw

Shaft Tube

Flexible Shaft

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.

Figure 22

New

Grease

Figure 20

Old

Grease

Shaft

Bolt

Bolt

Guard

Holder

A

Holder

B

Output

Shaft Collar

Blade

Remove and replace the filter element.

Before reinstalling the new filter ele-

ment, inspect the condition of all the

fuel system components (fuel pick-up

line, fuel return line, tank vent line, tank

vent, fuel cap and fuel tank). If damage,

splitting or deterioration is noted, the

unit should be removed from service

until it can be inspected or repaired by a

Shindaiwa-trained service technician.

XST021

Clean the

spark plug and

check the gap

at the electrode.

0.024–0.028 inch

(0.6–0.7 mm)

Figure 21

Filter Element

Hooked

Wire

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