Briggs & Stratton Twin Cylinder L-Head, Repair Manual

Page: 3 / 171

Sleeve Bore Models: 400400, 400700, 402400, 402700, 404400, 404700, 422400, 422700, 462700
Aluminum Bore Models: 401400, 401700, 421400, 421700
Torque Specifications – All Model Series
Common Specifications – All Model Series
Alternator (to cylinder) 20 in. lbs. (2.0 Nm)
Air Cleaner Base (to carb.) 25 in. lbs. (3.0 Nm)
Armature 25 in. lbs. (3.0 Nm)
Back Plate 150 in. lbs. (17.0 Nm)
Blower Housing 90 in. lbs. (10.0 Nm)
Breather 25 in. lbs. (3.0 Nm)
Carburetor (to manifold) 100 in. lbs. (11.0 Nm)
Carburetor Plug/Solenoid 100 in. lbs. (11.0 Nm)
Connecting Rod 190 in. lbs. (22.0 Nm)
Crankcase Cover/Sump
Horizontal Crankshaft
Crankcase Cover 225 in. lbs. (25.0 Nm)
Base 27 ft. lbs. (37.0 Nm)
Vertical Crankshaft
Steel Cover Plate 250 in. lbs. (28.0 Nm)
Aluminum Cover Plate 27 ft. lbs. (37.0 Nm)
Sump 225 in. lbs. (25.0 Nm)
Cylinder Head 160 in. lbs. (18.0 Nm)
Fan Retainer 150 in. lbs. (17.0 Nm)
Flywheel 150 ft. lbs. (203.0 Nm)
Governor Control Bracket 35 in. lbs. (4.0 Nm)
Governor Lever Nut 100 in. lbs. (11.0 Nm)
Intake Manifold 90 in. lbs. (10.0 Nm)
Spark Plug 200 in. lbs. (22.0 Nm)
Starter Motor 160 in. lbs. (18.0 Nm)
Starter Motor Thru Bolts 50 in. lbs. (6.0 Nm)
Armature Air Gap
Magnetron

Ignition .008” – .012” (0.20 – 0.30 mm)
Breaker Point Ignition .010” – .014” (0.25 – 0.35 mm)
Crankshaft End Play
Vertical Shaft Engines .002” – .026” (0.05 – 0.66 mm)
Horizontal Shaft Engines .004” – .012” (0.10 – 0.30 mm)
**Governed Idle Speed (all models) 1200 – 1400 RPM
Spark Plug Gap .030” (0.76 mm)
Valve Clearance (Cold)
Springs Installed
Intake
.004” – .006” (0.10 – 0.15 mm)
Exhaust .007” – .009” (0.17 – 0.22 mm)
Without Springs
Intake
.006” – .008” (0.15 – 0.20 mm)
Exhaust .009” – .011” (0.22 – 0.28 mm)
** Top Governed Speed: See Briggs & Stratton Service Engine Sales Manual Microfiche MS-6255 or
Sales Manual MS-4052
COMMON SPECIFICATIONS FOR OPPOSED TWIN CYLINDER ENGINES
II