Briggs and Stratton 294447

Briggs and Stratton 294447The Briggs and Stratton 294447 Vanguard is a 480 cc (29.3 cu·in) V-twin air-cooled four-stroke internal combustion gasoline engine, manufactured by Briggs and Stratton.

The B&S 294447 engine has an OHV (over-head valve) design and a horizontal PTO shaft. This engine is equipped with float type, down-draft carburetor and an electronic ignition system. The B&S 294447 engine used dual element air cleaner.

The cylinder bore is 68.0 mm (2.68 in) and the piston stroke is 66.0 mm (2.6 in). This engine produced 14.1 PS (10.4 kW; 14.0 HP) at 3,600 rpm of horsepower.

The breakdown of the engine code is as follows:

  • 29 – Displacement
  • 4 – Basic design series
  • 4 – Horizontal PTO-shaft
  • 4 – Ball bearing, flange mounting, pressure lubrication
  • 7 – Electric starter

General information

Engine Specifications
Model B&S 294447 Vanguard
Type 4-stroke, L-head, V-twin
Displacement 480 cm 3 (29.3 cu-in)
Max. horsepower 14.1 PS (10.4 kW; 14.0 HP) at 3,600 rpm
Max. torque
Fuel system Float type, down-draft carburetor
Cooling system Forced-air
Ignition system Electronic
Lubricating system Full pressure by gear-driven oil pump
Starting system Electric starter
Fuel used Gasoline
Fuel tank capacity

Cylinder Block and Head

Cylinder block
Compression ratio:
Bore x Stroke 68.0 mm X 66.0 mm (2.68 x 2.60 in)
Sleeve internal diameter 68.000-68.030 mm (2.6772-2.6783 in)
Number of piston rings (compression / oil): 2 / 1
Side clearance Top 0.045-0.076 mm (0.0018-0.003 in)
Second 0.045-0.076 mm (0.0018-0.003 in)
Oil 0.110-0.150 mm (0.0043-0.0059 in)
Ring end gap Top 0.200-0.400 mm (0.0079-0.0157 in)
Second 0.200-0.400 mm (0.0079-0.0157 in)
Oil 0.200-0.400 mm (0.0079-0.0157 in)
Connecting rod small end ID 17.090-17.100 mm (0.6728-0.6732 in)
Piston pin outer diameter 17.070-17.080 mm (0.672-0.6724 in)
Cylinder Head
Valve Arrangement: OHV
Valves: 4 (2 per cylinder)
Valve steam diameter INTAKE 5.950-5.960 mm (0.2343-0.2346 in)
EXHAUST 5.940-5.950 mm (0.2339-0.2343 in)

Tightening torque

Tightening torque specs
Air cleaner base 7.0 Nm; 5.2 ft·lb
Air cleaner support bracket 7.0 Nm; 5.2 ft·lb
Alternator 2.0 Nm; 1.5 ft·lb
Armature 3.0 Nm; 2.2 ft·lb
Blower housings 7.0 Nm; 5.2 ft·lb
Back plate 7.0 Nm; 5.2 ft·lb
Breather 3.0 Nm; 2.2 ft·lb
Carburetor to manifold 7.0 Nm; 5.2 ft·lb
Connecting rod 19.0 Nm; 9.6 ft·lb
Crankcase cover 17.0 Nm; 12.6 ft·lb
Cylinder head 19.0 Nm; 14.1 ft·lb
Cylinder shield 7.0 Nm; 5.2 ft·lb
Exhaust manifold 17.0 Nm; 12.6 ft·lb
Flywheel nut 175.0 Nm; 129.6 ft·lb
Fan Retainer 17.0 Nm; 12.6 ft·lb
Governor lever nut 8.0 Nm; 5.9 ft·lb
Governor control bracket 16.0 Nm; 11.9 ft·lb
Intake manifold to cylinder head 16.0 Nm; 11.9 ft·lb
Oil pump 7.0 Nm; 5.2 ft·lb
Rewind starter (to blower housing) 7.0 Nm; 5.2 ft·lb
Rocker arm lock nut 11.0 Nm; 8.2 ft·lb
Starter motor 16.0 Nm; 11.9 ft·lb
Starter motor thru bolts 6.0 Nm; 4.4 ft·lb
Valve cover 3.0 Nm; 2.2 ft·lb

Service Information

Engine
Max speed 3,600 rpm
Valve clearance
Intake valve clearance 0.10-0.15 mm (0.004-0.006 in)
Exhaust valve clearance 0.10-0.15 mm (0.004-0.006 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) 1.53 L (1.62 US. qt, 1.35 Imp. qt.)
Ignition system
Spark plug Champion RC12YC
Spark plug gap 0.7-0.8 mm (0.0276-0.0315 in)
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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