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Briggs and Stratton 422707 Engine

General Technical Data

Briggs and Stratton 422707 Engine Specifications

Engine Model - Briggs and Stratton 422707
Engine Type - 4-cycle opposed twin cylinder vertical shaft air-cooled gasoline engine
Number of Cylinders - 2
Displacement, cu.in (cc) - 42.33 (694)
Cylinder Bore, in (mm) - 3.44 (87.0)
Piston Stroke, in (mm) - 2.28 (58.0)
Rated Engine Power, hp (kW) - 18.0 (13.3)
Rated Engine Speed, rpm - 3600
Idle Speed, rpm - 1200-1400
Maximum Torque, Nm (ft-lbs) - 38.6 (28.6)
Torque Speed, rpm - 2600
Cylinder Bore Type - Cast iron sleeve
Lubrication System - Full pressure
Air Cleaner - Paper cartridge with a foam pre-cleaner
Cooling System - Forced air
Ignition System - Flywheel magneto
Starting System - Electric starter
Electrical System Rating, Volts - 12

Fuel System

Fuel System Type - Carburetor
Carburetor Type - Float
Governor Type - Mechanical
Fuel Type - Gasoline

Briggs and Stratton 422707 Maintenance Data

Cylinder Block and Valves

Cylinder Bore Inside Diameter (Maximum), in (mm) - 3.4405 (87.38)
Cylinder Head (Max. Out of Flatness), in (mm) - 0.004 (0.10)
Valve Clearance (Intake), in (mm) - 0.004-0.006 (0.10-0.15)
Valve Clearance (Exhaust), in (mm) - 0.007-0.009 (0.18-0.23)

Engine Oil and Filters

Engine Oil Type (Summer) - SAE 30, 10W-30
Engine Oil Type (Winter) - SAE 5W-30
API Service Classifications - SC, SD, SE or higher
Oil Capacity, qts (L) - 1.75 (1.70)
Oil Filter Part Number - 492932S
Air Filter Element Part Number - 394019

Ignition System

Spark Plug Type - Champion RJ-12, AC R-46, Autolite 308
Spark Plug Gap, in (mm) - 0.03 (0.76)
Point Gap, in (mm) - 0.020 (0.51)
Spark Plug Torque, Nm (lb-ft) - 22 (16.3)

Service Intervals

Service Air Filter Pre-Cleaner - Every 25 hours
Change Engine Oil - Every 50 hours
Check and Adjust Spark Plug - Every 50 hours
Change Engine Oil Filter - Every 100 hours
Replace Air Filter - Every 100 hours
Check Carburetor Adjustment - Every 100 hours
Replace Spark Plug - Every 100 hours
Check Valve Clearance - Every 200 hours

Briggs and Stratton 422707 Service Data

Cylinder Block

Cylinder Bore Inside Diameter (Standard), in (mm) - 3.4365-3.4375 (87.28-87.31)
Cylinder Bore Inside Diameter (Maximum), in (mm) - 3.4405 (87.38)
Cylinder Bore (Out-Of-Round), in (mm) - 0.0015 (0.04)
Main Bearing Bore Diameter (Cylinder Block), in (mm) - 1.379-1.380 (35.02-35.05)
Main Bearing Bore Diameter (Crankcase Cover), in (mm) - 1.379-1.380 (35.02-35.05)
Camshaft Bearing Bore Diameter (Cylinder Block), in (mm) - 0.6252-0.6257 (15.88-15.89)
Camshaft Bearing Bore Diameter (Crankcase Cover), in (mm) - 0.6252-0.6257 (15.88-15.89)
Crank Pin Journal Outside Diameter (Standard), in (mm) - 1.6235-1.6243 (41.23-41.25)
Crank Pin Journal Outside Diameter (Wear Limit), in (mm) - 1.622 (41.20)
Crankshaft Journal Outside Diameter (Magneto Side), in (mm) - 1.3776-1.3784 (34.99-35.01)
Crankshaft Journal Outside Diameter (PTO Side), in (mm) - 1.3776-1.3784 (34.99-35.01)
Crankshaft End Play, in (mm) - 0.002-0.026 (0.05-0.66)
Camshaft Journals Outside Diameter (Standard), in (mm) - 0.624-0.625 (15.85-15.87)
Camshaft Journal Outside Diameter (Wear Limit), in (mm) - 0.623 (15.82)
Connecting Rod Big End Inside Diameter (Standard), in (mm) - 1.625-1.6255 (41.27-41.28)
Connecting Rod Big End Inside Diameter (Wear Limit), in (mm) - 1.627 (41.32)
Connecting Rod Small End Inside Diameter (Standard), in (mm) - 0.8007-0.8011 (20.34-20.35)
Connecting Rod Small End Inside Diameter (Wear Limit), in (mm) - 0.802 (20.37)

Cylinder Head and Valves

Cylinder Head (Max. Out of Flatness), in (mm) - 0.004 (0.10)
Intake Valve Clearance, in (mm) - 0.004-0.006 (0.10-0.15)
Exhaust Valve Clearance, in (mm) - 0.007-0.009 (0.18-0.23)
Valve Guide Inside Diameter (Standard), in (mm) - 0.3145-0.3165 (7.98-8.04)
Valve Guide Inside Diameter (Wear Limit), in (mm) - 0.330 (8.38)
Intake Valve Stem Outside Diameter (Standard), in (mm) - 0.310 (7.87)
Intake Valve Stem Outside Diameter (Wear Limit), in (mm) - 0.308 (7.82)
Exhaust Valve Stem Outside Diameter (Standard), in (mm) - 0.310 (7.87)
Exhaust Valve Stem Outside Diameter (Wear Limit), in (mm) - 0.308 (7.82)
Cam Lobes (Intake), in (mm) - 1.1525-1.1555 (29.27-29.35)
Cam Lobes (Exhaust), in (mm) - 1.1225-1.1255 (28.50-28.58)

Piston and Piston Rings

Piston Pin Outside Diameter (Standard), in (mm) - 0.8003-0.8005 (20.32-20.33)
Piston Pin Outside Diameter (Wear Limit), in (mm) - 0.799 (20.30)
Piston Pin Bearing Inside Diameter (Standard), in (mm) - 0.8005-0.801 (20.33-20.35)
Piston Pin Bearing Inside Diameter (Wear Limit), in (mm) - 0.802 (20.37)
Top Ring End Gap (Standard), in (mm) - 0.007-0.017 (0.18-0.43)
Top Ring End Gap (Wear Limit), in (mm) - 0.030 (0.76)
Second Ring End Gap (Standard), in (mm) - 0.007-0.017 (0.18-0.43)
Second Ring End Gap (Wear Limit), in (mm) - 0.030 (0.76)
Oil Ring End Gap (Standard), in (mm) - 0.007-0.017 (0.18-0.43)
Oil Ring End Gap (Wear Limit), in (mm) - 0.035 (0.90)
Piston Ring Side Clearance (Standard), in (mm) - 0.0035-0.0060 (0.09-0.15)
Piston Ring Side Clearance (Wear Limit) - 0.009 (0.23)

Briggs and Stratton 422707 Torque Specifications

Air Cleaner Base to Carb, Lb-ft (Nm) - 2.2 (3.0)
Alternator to Cylinder, Lb-ft (Nm) - 1.5 (2.0)
Armature, Lb-ft (Nm) - 2.2 (3.0)
Blower Housings, Lb-ft (Nm) - 7.4 (10.0)
Breather, Lb-ft (Nm) - 2.2 (3.0)
Carburetor to Intake Manifold, Lb-ft (Nm) - 8.1 (11.0)
Carburetor to Solenoid, Lb-ft (Nm) - 8.1 (11.0)
Connecting Rod, Lb-ft (Nm) - 16.3 (22.0)
Crankcase Sump/Cover, Lb-ft (Nm) - 18.5 (25.0)
Cylinder Head, Lb-ft (Nm) - 13.3 (18.0)
Fan Retainer, Lb-ft (Nm) - 12.6 (17.0)
Flywheel Nut, Lb-ft (Nm) - 150.0 (203.0)
Governor Lever Nut, Lb-ft (Nm) - 8.1 (11.0)
Intake Manifold to Cylinder Head, Lb-ft (Nm) - 7.4 (10.0)
Spark Plug, Lb-ft (Nm) - 16.3 (22.0)
Starter Motor, Lb-ft (Nm) - 13.3 (18.0)