Briggs & Stratton 405777 Series - Adjust Valves; Install Cylinder Head

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INSTALL CYLINDER HEAD
1. Place cylinder head gasket over alignment dowels on
cylinder block, Fig. 22.
Fig. 22 − Install Cylinder Head Gasket
ALIGNMENT
DOWELS
2. Install cylinder head assembly, Fig. 23.
a. Torque head bolts in sequence shown to 220 in.
lbs. (25.0 Nm).
3. Install push rods. Make sure push rods are inserted in
recess in tappets.
Note: Intake push rods are aluminum.
Fig. 23 − Install Cylinder Head Assembly
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4. Compress valve springs and insert push rods into re-
cess in rocker arm adjustment screws, Fig. 24.
Fig. 24 − Install Push Rods
ADJUST VALVES
1. Set No. 1 cylinder at 1/4” (6.4mm) past TDC, compres-
sion stroke.
a. Adjust valves and check, Fig. 25.
Valve Clearance (cold) IN and
EX .005” (0.13 mm)
b. Torque jam nut and adjusting screw to 60 in. lbs.
(7.0 Nm).
2. Set No. 2 cylinder at 1/4” (6.4mm) past TDC, compres-
sion stroke.
a. Repeat for No. 2 cylinder.
Fig. 25 − Adjust Valve Clearances
TSM