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

REJECT DIMENSIONS	STANDARD SIZE	REJECT SIZE
CYLINDER
Main Bearing	1.3795 in. (35.04 mm)	1.383 in. (35.13 mm)
Camshaft Bearing	.5011 in. (15.88 mm)	.504 in. (12.80 mm)
Bore Diameter	3.437 in. (87.30 mm)	3.441 in. (87.40 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	1.3795 in. (35.03 mm)	1.383 in. (35.13 mm)
Camshaft Bearing	.501 in. (12.72 mm)	.504 in. (12.80 mm)
CRANKSHAFT
Crank Pin Journal	1.098 in. (27.89 mm)	1.097 in. (27.86 mm)
Mag-Side Journal	1.3775 in. (35.00 mm)	1.376 in. (34.95 mm)
PTO-Side Journal	1.3775 in. (35.00 mm)	1.376 in. (34.95 mm)
Eccentrics	2.2045 in. (55.91 mm)	2.202 in. (55.93 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	1.2505 in. (31.76 mm)	1.2525 in. (31.81 mm)
Piston Pin Bearing	.8006 in. (20.33 mm)	.802 in. (20.37 mm)
COUNTERWEIGHT SYSTEM
Bearings	2.207 in. (56.05 mm)	2.210 in. (56.13 mm)
PISTON
Piston Pin	.7998 in. (20.31 mm)	.799 in. (20.29 mm)
Piston Pin Bearing	.8006 in. (20.33 mm)	.802 in. (20.37 mm)
Ring End Gap (Top)	.006-.009 in. (.15-.23 mm)	.030 in. (.76 mm)
Ring End Gap (Middle)	.014-.018 in. (.35-.45 mm)	.030 in. (.76 mm)
Ring End Gap (Oil Control)	.006-.010 in. (.15-.25 mm)	.030 in. (.76 mm)
Ring Land Clearance (Top)	.002-.005 in. (.05-.12 mm)	.007 in. (.18 mm)
Ring Land Clearance (Middle)	.002-.005 in. (.05-.12 mm)	.007 in. (.18 mm)
Ring Land Clearance (Oil Control)	.002-.005 in. (.05-.12 mm)	.007 in. (.18 mm)
STARTER ROPE
Rope Size	#5.5	N/A
Rope Length	63.0 “ (1.6 meters)	N/A

12

171