Briggs and Stratton 289707

Briggs and Stratton 289707The Briggs and Stratton 289707 is a 465 cc (28.38 cu·in) single-cylinder air-cooled four-stroke internal combustion gasoline engine, manufactured by Briggs and Stratton.

The B&S 289707 engine has an L-head (side valve) design and a vertical PTO shaft. This engine is equipped with float type carburetor and an electronic ignition system. The B&S 286707 engine used a paper air filter with a foam pre-cleaner.

The cylinder bore is 87.30 mm (3.44 in) and the piston stroke is 77.7 mm (3.06 in). This engine produced 12.6 PS (9.3 kW; 12.5 HP) at 3,600 rpm of horsepower.

The breakdown of the engine code is as follows:

  • 28 – Displacement
  • 9 – Basic design series
  • 7 – Vertical PTO-shaft
  • 0 – Plain bearing
  • 7 – Electric starter

General information

Engine Specifications
Model B&S 289707
Type 4-stroke, L-head, single-cylinder
Displacement 465 cm 3 (28.38 cu-in)
Max. horsepower 12.6 PS (9.3 kW; 12.5 HP) at 3,600 rpm
Max. torque
Fuel system Carburetor
Cooling system Forced-air
Ignition system Electronic
Lubricating system Full pressure
Starting system Electric starter
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel tank capacity

Cylinder Block and Head

Cylinder block
Compression ratio:
Bore x Stroke 87.3 mm X 77.7 mm (3.44 x 3.06 in)
Sleeve internal diameter 87.300-87.400 mm (3.437-3.4409 in)
Number of piston rings (compression / oil): 2 / 1
Side clearance Top 0.05-0.12 mm (0.002-0.0047 in)
Second 0.05-0.12 mm (0.002-0.0047 in)
Oil 0.05-0.12 mm (0.002-0.0047 in)
Ring end gap Top 0.15-0.23 mm (0.0059-0.0091 in)
Second 0.35-0.45 mm (0.0138-0.0177 in)
Oil 0.15-0.25 mm (0.0059-0.0098 in)
Connecting rod small end ID 20.330-20.370 mm (0.8004-0.802 in)
Piston pin outer diameter 20.290-20.310 mm (0.7988-0.7996 in)
Cylinder Head
Valve Arrangement: L-head (sidevalve)
Valves: 2
Valve steam diameter INTAKE 5.920-5.970 mm (0.233-0.235 in)
EXHAUST 5.920-5.970 mm (0.233-0.235 in)

Tightening torque specs

Tightening torque specs
Air cleaner base 6.0 Nm; 4.4 ft·lb
Alternator 2.0 Nm; 1.5 ft·lb
Armature 3.0 Nm; 2.2 ft·lb
Blower housings 10.0 Nm; 7.4 ft·lb
Blower housing brackets 10.0 Nm; 7.4 ft·lb
Breather 3.0 Nm; 2.2 ft·lb
Carburetor to intake manifold 8.0 Nm; 5.9 ft·lb
Carburetor solenoid 5.0 Nm; 3.7 ft·lb
Connecting rod 17.0 Nm; 12.6 ft·lb
Control bracket 3.0 Nm; 2.2 ft·lb
Crankcase cover 25.0 Nm; 18.5 ft·lb
Cylinder head 25.0 Nm; 18.5 ft·lb
Cylinder shield 5.0 Nm; 3.7 ft·lb
Exhaust manifold / adapter 19.0 Nm; 14.0 ft·lb
Flywheel nut 135.0 Nm; 100.0 ft·lb
Flywheel fan 16.0 Nm; 11.9 ft·lb
Fuel pump 10.0 Nm; 7.4 ft·lb
Governor lever nut 5.0 Nm; 3.7 ft·lb
Intake manifold to cylinder head 10.0 Nm; 7.4 ft·lb
Muffler 10.0 Nm; 7.4 ft·lb
Oil drain plug 11.0 Nm; 8.1 ft·lb
Oil fill tube 10.0 Nm; 7.4 ft·lb
Oil pump cover 10.0 Nm; 7.4 ft·lb
Regulator / rectifier 5.0 Nm; 3.7 ft·lb
Rewind starter 3.0 Nm; 2.2 ft·lb
Rocker ball set screw or nut 5.0 Nm; 3.7 ft·lb
Starter clutch 88.0 Nm; 65.2 ft·lb
Starter motor 16.0 Nm; 11.9 ft·lb
Rocker cover 7.0 Nm; 5.2 ft·lb

Service Information

Engine
Max speed 3,600 rpm
Valve clearance
Intake valve clearance 0.08-0.13 mm (0.003-0.005 in)
Exhaust valve clearance 0.13-0.18 mm (0.005-0.007 in)
Oil system
Oil type API SF, SG, SH, SJ or higher
Recommended oil Summer: SAE 30, 10W-30
Winter: SAE 5W-30
Oil capacity (with filter) 1.42 L (1.5 US. qt, 1.25 Imp. qt.)
Ignition system
Spark plug Champion RJ-19LM
Spark plug gap 0.7-0.8 mm (0.0276-0.0315 in)
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