Briggs & Stratton MS-0750 - SECTION 5 ENGINE ASSEMBLY; INSTALL CRANKSHAFT

Vanguard
TM
Twin-Cylinder OHV Liquid-Cooled Engine
Section 5 - Engine Assembly
Page 57
SECTION 5
ENGINE ASSEMBLY
INSTALL CRANKSHAFT
1. Lubricate mag. bearing and lips of oil seal with
engine oil and install crankshaft.
2. Lubricate and install new governor shaft oil seal in
cylinder. Then lubricate and install governor shaft
, Fig. 136.
Fig. 136
ASSEMBLE PISTON AND CONNECTING
ROD
Lubricate parts with engine oil and assemble #1 piston
and connecting rod, Fig. 137.
1. Offset casting mark on piston must face flywheel
side.
2. “OUT 1” on connecting rod must face PTO side
(opposite notch or casting mark on piston).
a. Install piston pin locks with needle nose pliers.
Fig. 137
Lubricate parts with engine oil and assemble #2 piston
and connecting rod, Fig. 138.
1. Offset casting mark on piston must face flywheel
side.
2. “OUT 2” on connecting rod must face PTO side
(opposite notch or casting mark on piston).
a. Install piston pin locks with needle nose pliers.
Fig. 138
ASSEMBLE PISTON RINGS TO PISTON
Install rings in order shown, Fig. 139. Use ring expander,
Tool
#19340 when installing center and top compression
rings.
1. Install oil ring expander.
a. Install lower scraper ring.
b. Install upper scraper ring
2. Install center compression ring with I.D. mark up.
NOTE: Center compression ring is identified by
black phosphate coating.
3. Install top compression ring with I.D. mark up.
Fig. 139
NOTCH OR
CASTING MARK
TOWARD
FLYWHEEL SIDE
“OUT 1”
CYLINDER #1
NOTCH OR
CASTING MARK
TOWARD
FLYWHEEL SIDE
“OUT 2” CYLINDER #2
TOP
COMPRESSION RING
(BARREL FACE)
SECOND
COMPRESSION RING
(TAPER FACE)
OIL RING
EXPANDER
ID MARK
INDICATES
TOP OF
RING