Briggs & Stratton 115400, Manual

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11
BALANCING SYSTEMS
Rotating Counterweight System
(161400, 185400, 235400, 245400)
This system uses a geared counterweight ( A )
that rotates opposite the crankshaft
counterweight (
B ), Fig. 8.
Fig. 8
Removal/Inspection
1. Remove cylinder cover. See SECTION
10- CYLINDERS, COVERS AND
SUMPS.
2. Turn crankshaft until all timing marks are
aligned.
3. Remove counterweight.
4. Measure and inspect the counterweight
shaft journals ( E ) and gear teeth ([ F ] Fig.
9). Replace shaft if worn beyond
tolerances.
5. Measure both counterweig ht bearings.
6. Replace the cylinder cover or cylinder if
corresponding bearing is beyond
tolerances.
For reject size dimensi ons, see SECTION 14-
ENGINE SPECIFICATIONS.
Fig. 9
Installation
Refer to Fig. 10.
1. Turn crankshaft to align timing marks ( G )
on cam gear and crankshaft timing gea r.
2. Install counterweight ( D ) into cyli nder.
3. Align timing mark on counterweight gear
with second mark on crankshaft timing
gear (
H ).
4. Install cylinder cover.
Fig. 10