Yard-man YM26SS User Manual download pdf (Page 23)

10. If the clearance is not within specification:

a. Turn the adjusting nut using a 5/16 inch (8 mm)

wrench or nut driver (Fig. 42).

• To increase clearance, turn the adjusting nut

counterclockwise.

• To decrease clearance, turn the adjusting nut

clockwise.

b. Recheck both clearances, and adjust as necessary.

11. Reinstall the rocker arm cover using a new gasket.

Torque the screw to 20–30 in•

lb (2.2–3.4 N•m).

NOTE: A rocker arm cover gasket, Part # 791-182099

can be purchased from your local authorized

dealer.

12. Reinstall the engine cover. Check alignment of the

cover before tightening the screws. Tighten screws.

13. Replace the muffler cover. Slip the long tabs on the

muffler cover into the engine cover. Slide the

notches on the side of the muffler cover over the

tabs on the engine cover and snap into place

(Fig. 38).

14. Check the spark plug and reinstall. See Replacing

the Spark Plug in the Maintenance and Repair

Instructions section.

15. Replace the spark plug wire.

9. Slide the feeler gauge between the rocker arm and

the valve return spring. Measure the clearance

between the valve stem and rocker arm (Fig 42).

Do both intake and exhaust valves.

Adjusting Nuts

Feeler Gauge

Rocker Arms

Gasket

Fig. 42

Fig. 43

The recommended clearance for both intake and

exhaust is .003 – .006 in. (.076 – 0.152 mm). Use a

standard automotive .005 in. (0.127 mm) feeler gauge.

The feeler gauge should slide between the rocker arm

and valve stem with a slight amount of resistance,

without binding (Fig. 43).

Feeler Gauge

Adjusting Nut

Rocker Arm

.003–.006 in.

(.076–0.152 mm)

Valve Stem

SECTION 7: MAINTENANCE AND REPAIR INSTRUCTIONS

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 91 92

Comments to this Manuals

No comments

Yard-man YM26SS User Manual Page 23

Comments to this Manuals

Related products and manuals for Gardening equipment Yard-man YM26SS