Briggs & Stratton Twin Cylinder L-Head Repair Manual page 4

STANDARD AND REJECT DIMENSIONS – ALL MODEL SERIES
DESCRIPTION
Cylinder
Bore (All)
Out of round: Aluminum Bore
Sleeve Bore
Main Bearing (Magneto)
Cam Bearing (Magneto)
Valve Guide
Valve Stem
Crankcase Cover
Main Bearing (PTO)
Cam Bearing (PTO)
Crankshaft
Crankpin
Magneto Journal
PTO Journal
Camshaft
Journals
Lobes
Intake 14, 16, 18, 20 HP
Intake 12.5 HP
Exhaust 12.5, 14, 16, 18 HP
Exhaust 20 HP
Connecting Rod
Crankpin Bearing
Piston Pin Bearing
Piston Pin
Piston Pin Bearing (Piston)
Piston Rings
Ring End Gap
Aluminum Bore – Top & Center
Oil
Cast Iron Bore – Top & Center
Oil
Ring Side Clearance (All)
STANDARD DIMENSION
3.4365" – 3.4375" (87.28 – 87.31 mm)
1.379" – 1.380" (35.02 – 35.05 mm)
.6252" – .6257" (15.88 – 15.89 mm)
.3145" – .3165" (7.98 – 8.04 mm)
.310" (7.87 mm)
1.379" – 1.380" (35.02 – 35.05 mm)
.6252" – .6257" (15.88 – 15.89 mm)
1.6235" – 1.6243" (41.23 – 41.25 mm)
1.3776" – 1.3784" (34.99 – 35.01 mm)
1.3776" – 1.3784" (34.99 – 35.01 mm)
.624" – .625" (15.85 – 15.87 mm)
1.1525" – 1.1555" (29.27 – 29.35 mm)
1.0575" – 1.0605" (26.86 – 26.93 mm)
1.1225" – 1.1255" (28.50 – 28.58 mm)
1.1525" – 1.1555" (29.27 – 29.35 mm)
1.625" – 1.6255" (41.27 – 41.28 mm)
.8007" – .8011" (20.34 – 20.35 mm)
.8003" – .8005" (20.32 – 20.33 mm)
20.35 mm )
.8005" – .801" (20.33 –
.007" – .017" (.18 – .43 mm)
.007" – .017" (.18 – .43 mm)
.007" – .017" (.18 – .43 mm)
.007" – .017" (.18 – .43 mm)
.0035" – .006" (.09 – .15 mm)
REJECT DIMENSION
3.4405" (87.38 mm)
.0025" (.06 mm)
.0015" (.04 mm)
1.383" (35.12 mm)
.6275" (15.93 mm)
.330" (8.38 mm)
.308" (7.82 mm)
1.383" (35.12 mm)
.6275" (15.93 mm)
1.622" (41.20 mm)
1.376" (34.95 mm)
1.376" (34.95 mm)
.623" (15.82 mm)
1.150" (29.20 mm)
1.055" (26.80 mm)
1.120" (28.45 mm)
1.150" (29.20 mm)
1.627" (41.32 mm)
.802" (20.37 mm)
.799" (20.30 mm)
.802" (20.37 mm)
.035" (.90 mm)
.045" (1.14 mm)
.030" (.76 mm)
.035" (.90 mm)
.009" (.23 mm)
III