Briggs & Stratton 115400, Manual

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223
12
Replace piston if rej ect dimensio ns are
exceeded.
See SECTION 14- ENGINE
SPECIFICATIONS.
Measure Piston Ring End Gap
1. Insert the top ring into the cylinder about
an inch below the surface of the head ([ A ]
Fig. 8).
2. Measu re gap with feeler gauge ([ B ] Fig. 8)
as shown.
Fig. 8
3. Repeat this process for the 2nd ring.
INSPECT CONNECTING ROD
Inspect Connecting Rod Bearings
Replace the connecting rod if either bearing is
scored, scuffed or otherwise damaged.
1. Measure the crank pin be aring ( A ) and the
piston pin bearing ([ B ] Fig. 9).
2. Use a telescoping gauge at approximate
120° intervals and record the readings to
get an average dimension, as shown i n
Fig. 9.
3. Replace rod if either measurement
exceeds tolerances.
See SECTION 14- ENGINE SPECIFICATIONS.
Fig. 9
ASSEMBLE PISTON AND
CONNECTING ROD
Piston Pin Installation
1. Orient the connecting rod and piston as
shown in (Fig. 10).
2. Align the letters “MAG” ([ A ] if used) on the
connecting rod with the notch or arrow
([
B ] Fig. 10) on the piston.
Fig. 10
3. If piston uses two pin locks, install one
lock into the groove at this time.
4. Oil the piston pin and slip through piston
bore and connecting rod pin bearing.
5. Install remaining pin lock to secure
assembly.
NOTE: (085400, 115400, 117400, 118400,
185400, 235400, 245400)
These pistons do