Briggs & Stratton Twin Cylinder L-Head, Руководство по ремонту

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