Briggs & Stratton Twin Cylinder L-Head Repair Manual page 154

2. Lubricate cylinder bores and crankpin and rotate
crankshaft until it as at bottom of stroke.
3. Install #1 piston with notch on piston toward
flywheel side, Fig. 4.
a. Push piston down by hand until connecting
rod is seated on crankpin.
4. Assemble connecting rod cap to rod with match
marks aligned.
5. Install rod screws and washers.
Repeat procedure for other piston and connecting rod
assembly.
NOTE: ENGINE MODELS 400000 – 420000:
With piston and connecting rod assem-
blies installed, the oil hole in the #1
connecting rod must face toward the cam
gear. The oil hole in the #2 connecting rod
must face away from the cam gear, Fig. 5.
NOTE: ENGINE MODELS 462770: With piston
and connecting rod assemblies installed,
make sure the machined relief areas on
the connecting rod and cap are together
and facing cam gear, Fig. 6.
13
NOTCH
FLYWHEEL
SIDE
Fig. 4 – Install Piston And Connecting Rod
CYL. #2
NO. 1 ROD
WITH HOLE
TOWARD
CAM GEAR
Fig. 5 – Installing Connecting Rods –
Models 400000-420000
RELIEF AREA
MUST FACE
CAM GEAR
Fig. 6 – Installing Connecting Rods – Model 462770
OIL HOLE
OPPOSITE
CAM GEAR
FLYWHEEL
SIDE
CYL. #1
3