Briggs & Stratton 270962, 271172, CE8069, 276535, 273521 manual

6

Figure 18

NOTE: Do not torque each screw in one step as it may result in a warped cylinder head. Step- torque all screws to approximately 1/3 of final torque value, then to 2/3 final torque value, then finish at final torque value.

3.Install push rod guide and rocker arm studs (models 97700, 99700). Torque studs to values listed in Section 12 - Engine Specifications.

-OR-

4.Install rocker arm studs (models 110000, 120000, 150000). Torque to values listed in Section 12 - Engine Specifications.

NOTE: Early production of vertical models 110000 and 120000 require a jam nut to be threaded approximately half way up the threads of the stud before installation into the head.

5.Install push rods through guides and into same positions as removed. Ensure rods are seated in valve tappets. Place valve stem caps (if used) on valve stems.

6.Place rocker arms and rocker balls on rocker arm studs (Figure 19). Install rocker arm screws and/or lock nuts on studs and tighten until there is zero clearance between the valve stem caps and the rocker arms.

Figure 19

7.Rotate crankshaft at least twice to ensure proper movement of the push rods and rocker arms.

8.Adjust valve clearance per Section 1, then install a new rocker cover gasket and the rocker cover. Torque screws to values listed in Section 12 - Engine Specifications.

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