Briggs & Stratton 405777 Series Manual page 83

ENGINE DISASSEMBLY
Drain oil, remove oil filter and remove engine from
equipment. Remove spark plugs. Remove cylinder heads.
See Section 5. Remove flywheel, disconnect stop switch
wires at armatures and remove armatures. See Section 2.
1. Remove the following parts, Fig. 1.
a. Back plate
b. Air guide
c. Starter motor
d. Oil filltube and dipstick
e. Stop switch wiring harness
f. Breather and oil vapor collector
g. Alternator
2. Remove oil pump. Fig. 2.
a. Oil pump cover
b. Inner rotor
c. Outer rotor
d. Drive shaft
3. Remove sump and discard gasket, Fig. 3.
a. Remove governor gear and thrust washer.
4. Rotate crankshaft and camshaft until timing marks align
and remove camshaft, Fig. 4.
a. Remove tappets.
TSM
G
A
D
E
Fig. 1 − Remove Back Plate And Starter Motor
C
B
Fig. 2 − Remove Oil Pump
GOVERNOR GEAR
Fig. 3 − Remove Sump
Fig. 4 − Align Timing Marks
F
B
C
D
A
TIMING MARKS
3