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Hour maintenance (continued) 135-hour maintenance – Shindaiwa 81604 User Manual

Page 13

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1

Gearcase Protector

(P/N 72958-16210)

Nut

Inspect the Gearcase Protector

The metal gearcase protector (p/n 7958-

1610) is installed to protect the gearcase

flange from damage when working close to

sidewalks or other abrasive surfaces, and

should be routinely inspected for damage

or excessive wear.
When replacing the protector, inspect to be

sure that both of the protector mounting

screws are firmly tightened and each screw

is locked in place with a nut as shown.

CAUTION!

The D-shaped shim washer must be

positioned with its flat edge toward the

shaft tube.

D-shaped

Shim Washer

Flat

(toward tube)

Shaft

Tube

Gearcase

26024

Figure 23

Figure 24

50-Hour Maintenance (continued)

135-hour Maintenance

Every 135 hours of operation,

remove and clean the muffler.

WARNING!
Never operate this trimmer

with a damaged or missing muffler or

spark arrester! Operating with missing

or damaged exhaust components is

a fire hazard, and can also damage

your hearing!

1. Remove the spark plug boot.
. With a mm hex wrench remove the 1

muffler cover and engine cover screws

and the engine cover. See Figure 5.

. With a Phillips type screwdriver remove

the 5 screws holding the spark arrester

screen and cover to the muffler. See

Figure 5.

4. Remove the screen and clean it with a

stiff bristle brush.

5. With a 4 mm hex wrench remove the

muffler bolts and the muffler.

See Figure 5.

6. Inspect the cylinder exhaust port for any

carbon buildup.

7. Gently tap the muffler on a wood surface

to dislodge any loose carbon.

Engine Cover

Screws

IMPORTANT!

If you note excessive carbon buildup, consult

with an authorized Shindaiwa servicing

dealer.

8. Reassemble the spark arrester, muffler

and engine cover in the reverse order of

disassembly.

Figure 25

Muffler

Cover

Engine

Cover

Muffler

Cover Screw

Spark Arrester

Screen

Muffler

Gasket

Muffler

Spark Arrester

Cover

Gasket

Screws

Muffler

Screws

Outlet

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