Ryobi SB720R Manual del operador descargar pdf (Pagina 20)

ROCKER ARM CLEARANCE

NOTE: This requires some disassembly of the engine, tf

you feel unsure or unqualified to perform this,

take the unit to an authorized service center.

Inspect the valve to rocker arm clearance every 50 hours

of operation using a flat feeler gauge.

NOTE: The engine must be cold when checking or

adjusting the valve clearance,

This task should be performed inside, in a clean, dust

free area.

1. Loosen the four (4) screws shown in figure 31.

Engine Cover

6. Remove the screw holding the rocker arm cover with

a large flat blade screwdriver or Torx T25 bit (Fig.

33). Remove the rocker arm cover, and gasket.

Rocker Arm Cover

• Loosen Screws

......... Fig.31 ............

2. Remove the three (3) screws that secure the engine

cover (Figs. 31 and 32),

I[ )1

I1( )11

Back of Engine

........ Fig. 32 .......

3. Disconnect the spark plug wire.

4. Remove the spark plug

5. Remove the engine cover (Fig. 31).

Hole

........ Fig.33 ........

7. Pull the starter rope slowly to bring the piston to Top

Dead Center.

• While looking inthe spark plug hole (Fig. 33), the

piston is at the top of the stroke.

• Both valves are closed.

= Both rocker arms move freely.

If not, repeat this step.

8. Slide the feeler gauge between the rocker arm and

the valve return spring. Measure the clearance

between the valve stem and rocker arm (Fig 34). Do

both intake and exhaust valves.

Rocker Arm

Adjusting Nut

Gasket Feeler Gauge

................... Fig. 34 ...............

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 26

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Ryobi SB720R Manual del operador Pagina 20

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