Briggs & Stratton Twin Cylinder L-Head, Repair Manual

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2
INSTALL CRANKSHAFT
Install Crankshaft And Camshaft – Plain
Bearing Models
Lubricate crankshaft, tappets, camshaft journals and
lobes with engine oil. Assemble timing gear to
crankshaft.
1.
Install tappets.
2. Install crankshaft into cylinder.
3. Align timing marks and install camshaft, Fig. 1.
Fig. 1 – Install Crankshaft – Plain Bearing Models
CAM-
SHAFT
TIMING
MARK
(DOT)
CRANKSHAFT
TIMING
MARK
Install Crankshaft And Camshaft – Ball
Bearing Models
Lubricate crankshaft, tappets, camshaft journals and
lobes with engine oil.
NOTE: On ball bearing crankshafts, the gear
teeth are covered by the ball bearing. The
timing mark is located on the #2 crankpin.
1. Install tappets.
2. Align timing mark on #2 crankpin with timing mark
on camshaft and insert both into cylinder.
Fig. 2 – Install Crankshaft – Ball Bearing Models
TIMING
MARK
ON
CAMSHAFT
CRANKPIN
TIMING
MARK
#2
CRANKPIN
INSTALL PISTON AND CONNECTING ROD
NOTE: Install #1 piston and connecting rod first.
1. Oil piston rings, piston skirt, and compress rings
with Ring Compressor, Tool #19230, Fig. 3.
a.
Place piston and ring compressor upside
down on bench with projections on compres-
sor facing up.
b. Tighten ring compressor evenly until rings are
fully compressed.
c. Then loosen ring compressor very slightly so
that compressor can be rotated on piston skirt
while holding connecting rod.
Fig. 3 – Compressing Rings
COMPRESSOR SHOULD BE ABLE TO ROTATE
WHILE HOLDING CONNECTING ROD
PROJECTIONS