Model 20

Model 20 Engine by Briggs & Stratton Racing
General Specifications
Model NumberI/C
Type202400
Displacement305
Bore3.120
Stroke2.438
Compression Ratio8.0 to 1

Technical / Torque Specifications

Description Wrench / socket size Torque
A/C Support Screw (Cartridge)3/8"55 in-lbs (6.2 Nm)
A/C backplate (nuts to carb studs, panel & cartridge a/c)7/16"55 in.lbs (6.2 Nm)
Alternator (stator)_"20 in.lbs. (2.2 Nm)
Armature5/16"25 in.-lbs (2.8 Nm)
Blower Housing3/8"85 in-lbs (9.6 Nm)
Carburetor Studs (to cyl head)E-590 in.lbs. (10.2 Nm)
Connecting Rod5/16"100 in.lbs(11.2 Nm)
Control Bracket to cylinder3/8"100 in.lbs (11.3 Nm)?
Crankcase Cover_"200 in.lbs. (22.6 Nm)
Cylinder Shield_"35 in.lbs. (3.9 Nm)
Flywheel1 1/8"110 ft-lbs (149.1 Nm)
Flywheel Fan_"60 in-lbs (6.8 Nm)
Fuel Tank3/8"95 in-lbs (10.7 Nm)
Governor Nut3/8"40 in.lbs (4.5 Nm)
Head Bolts_"220 in.lbs (25.0 Nm)
Muffler Bolts (exhaust Port)_"165 in-lbs (18.6 Nm)
(bracket)3/8"120 in-lbs (13.6 Nm)
Muffler Guard5/16"30 in.lbs (3.4 Nm)
Muffler Deflectors_"30 in.lbs (3.4 Nm)
Oil Drain Plugs3/8" Square Drive (internal)125 in.lbs.(14.0 Nm)
Oil Fill plugs 40 in-lbs (4.5 Nm)
Oil Fill Tube5/16"20 in-lbs (2.3 Nm)
Oil Minder Electronics Box_"40 in-lbs (4.5 Nm)
Oil Minder Float5/16"30 in-lbs (3.4 Nm)
Rewind5/16"30 in.lbs (3.4 Nm)
Rocker Arm8mm100 in.lbs. (11.2 Nm)
Rocker Arm Adjustment ScrewT-40 
Rocker Arm Lock Nut13 mm60 in.lbs (6l6 Nm)
Spark Plug5/8" mm Deept180 in.lbs (20.0 Nm)
Starter Guard_"25 in-lbs (2.8 Nm)
Starter Motor_" or T-40140 in-lbs (15.8 Nm)
Starter Thru Bolts5/16"50in.lbs (5.6Nm)
Valve Cover3/8"55 in.lbs. (6.2 Nm)

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Machine Name= BRIGG-CW-WEB03