50-Hour Maintenance (continued)

CAUTION!

The D-shaped shim washer must be positioned with its flat edge toward the shaft tube.

Gearcase

Shaft

Tube

D-shaped

 

Shim Washer

Flat 26024

 

Figure 23

(toward tube)

 

Inspect the Gearcase Protector

The metal gearcase protector (p/n 72958- 16210) 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.

Nut

 

Gearcase Protector

Figure 24

(P/N 72958-16210)

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.

2.With a 3 mm hex wrench remove the 1 muffler cover and 3 engine cover screws and the engine cover. See Figure 25.

3.With a Phillips type screwdriver remove the 5 screws holding the spark arrester screen and cover to the muffler. See Figure 25.

4.Remove the screen and clean it with a stiff bristle brush.

5.With a 4 mm hex wrench remove the 3 muffler bolts and the muffler.

See Figure 25.

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

Engine

 

 

 

Cover

 

 

 

Screws

 

 

 

 

 

 

 

 

 

Muffler

 

 

 

 

Cover

 

 

 

 

Muffler

 

 

 

Cover Screw

 

 

 

 

Muffler

 

 

 

Muffler

Screws

 

 

 

 

 

 

 

Gasket

Screws

 

 

 

 

 

Muffler

Spark Arrester

Spark Arrester

Outlet

 

Gasket

Screen

Cover

 

Figure 25

 

 

 

 

 

8. Reassemble the spark arrester, muffler

IMPORTANT!

If you note excessive carbon buildup, consult

and engine cover in the reverse order of

disassembly.

with an authorized Shindaiwa servicing

 

dealer.

 

 

 

13

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Image 13
Shindaiwa 81645 manual Inspect the Gearcase Protector, With an authorized Shindaiwa servicing, Dealer

81645 specifications

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