Briggs & Stratton 276535, 271172, 270962, CE8069, 273521 manual Main Bearing

REJECT DIMENSIONS	STANDARD SIZE	REJECT SIZE
CYLINDER
Main Bearing	1.6248 in. (41.27 mm)	1.629 in. (41.38 mm)
Camshaft Bearing	.5011 in. (15.88 mm)	.504 in. (12.80 mm)
Bore Diameter	3.701 in. (94.01 mm)	3.705 in. (94.11 mm)
Bore Out-Of-Round	N/A	.0015 in. (.04 mm)
CYLINDER HEAD
Valve Guide	.237 in. (6.02 mm)	.240 in. (6.10 mm)
Intake Valve Stem Diameter	.235 in. (5.97 mm)	.233 in. (5.92 mm)
Exhaust Valve Stem Diameter	.235 in. (5.97 mm)	.233 in. (5.92 mm)
CYLINDER COVER
Main Bearing	1.6248 in. (41.27 mm)	1.629 in. (41.38 mm)
Camshaft Bearing	.501 in. (12.72 mm)	.504 in. (12.80 mm)
CRANKSHAFT
Crank Pin Journal	1.6235 in. (41.24 mm)	1.6225 in. (41.21 mm)
Mag-Side Journal	1.6235 in. (41.24 mm)	1.6225 in. (41.21 mm)
PTO-Side Journal	1.6235 in. (41.24 mm)	1.6225 in. (41.21 mm)
Eccentrics	2.681 in. (68.10 mm)	2.6793 in. (68.05 mm)
CAMSHAFT
Mag-Side Journal	.499 in. (12.67 mm)	.498 in. (12.65 mm)
PTO-Side Journal	.499 in. (12.67 mm)	.498 in. (12.65 mm)
Intake Lobes	1.240 in. (31.49 mm)	1.234 in. (31.34 mm)
Exhaust Lobes	1.240 in. (31.49 mm)	1.234 in. (31.34 mm)
CONNECTING ROD
Crank Pin Bearing	1.100 in. (37.06 mm)	1.102 in. (27.99 mm)
Piston Pin Bearing	.6258 in. (15.89 mm)	.6268 in. (15.92 mm)
COUNTERWEIGHT SYSTEM
Pivot Shaft Bore	1.100 in. (37.06 mm)	1.102 in. (27.99 mm)
Counterweight Pin Bore	1.100 in. (37.06 mm)	1.102 in. (27.99 mm)
Link Pin	1.100 in. (37.06 mm)	1.102 in. (27.99 mm)
Connector Link Bore	1.100 in. (37.06 mm)	1.100 in. (27.99 mm)
Eccentric Bearing	.6258 in. (15.89 mm)	.6268 in. (15.92 mm)
PISTON
Piston Pin	.6247 in. (15.86 mm)	.6242 in. (15.85 mm)
Piston Pin Bearing	.6258 in. (15.89 mm)	.6268 in. (15.92 mm)
Ring End Gap (Top)	.006-.010 in. (.15-.35 mm)	.020 in. (.51 mm)
Ring End Gap (Middle)	.012-.020 in. (.30-.51 mm)	.030 in. (.76 mm)
Ring End Gap (Oil Control)	.020-.025 in. (.50-.63 mm)	.035 in. (.89 mm)
Ring Land Clearance (Top)	.002-.003 in. (.05-.08 mm)	.004 in. (.10 mm)
Ring Land Clearance (Middle)	.002-.003 in. (.05-.08 mm)	.004 in. (.10 mm)
Ring Land Clearance (Oil Control)	.002-.003 in. (.05-.08 mm)	.004 in. (.10 mm)

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