Briggs and Stratton 281707

Briggs and Stratton 281707The Briggs and Stratton 281707 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 281707 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 281707 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 12.2 PS (9.0 kW; 12.0 HP) at 3,600 rpm of horsepower.

The breakdown of the engine code is as follows:

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

General information

Engine Specifications
ModelB&S 281707
Type4-stroke, L-head, single-cylinder
Displacement465 cm 3 (28.38 cu-in)
Max. horsepower12.2 PS (9.0 kW; 12.0 HP) at 3,600 rpm
Max. torque
Fuel systemCarburetor
Cooling systemForced-air
Ignition systemElectronic
Lubricating systemFull pressure
Starting systemElectric starter
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel tank capacity

Cylinder Block and Head

Cylinder block
Compression ratio:
Bore x Stroke87.3 mm X 77.7 mm (3.44 x 3.06 in)
Sleeve internal diameter87.300-87.400 mm (3.437-3.4409 in)
Number of piston rings (compression / oil):2 / 1
Side clearanceTop0.05-0.12 mm (0.002-0.0047 in)
Second0.05-0.12 mm (0.002-0.0047 in)
Oil0.05-0.12 mm (0.002-0.0047 in)
Ring end gapTop0.15-0.23 mm (0.0059-0.0091 in)
Second0.35-0.45 mm (0.0138-0.0177 in)
Oil0.15-0.25 mm (0.0059-0.0098 in)
Connecting rod small end ID20.330-20.370 mm (0.8004-0.802 in)
Piston pin outer diameter20.290-20.310 mm (0.7988-0.7996 in)
Cylinder Head
Valve Arrangement:L-head (sidevalve)
Valves:2 (4 in total)
Valve steam diameterINTAKE5.920-5.970 mm (0.233-0.235 in)
EXHAUST5.920-5.970 mm (0.233-0.235 in)

Tightening torque specs

Tightening torque specs
Air cleaner base6.0 Nm; 4.4 ft·lb
Alternator2.0 Nm; 1.5 ft·lb
Armature3.0 Nm; 2.2 ft·lb
Blower housings10.0 Nm; 7.4 ft·lb
Blower housing brackets10.0 Nm; 7.4 ft·lb
Breather3.0 Nm; 2.2 ft·lb
Carburetor to intake manifold8.0 Nm; 5.9 ft·lb
Carburetor solenoid5.0 Nm; 3.7 ft·lb
Connecting rod17.0 Nm; 12.6 ft·lb
Control bracket3.0 Nm; 2.2 ft·lb
Crankcase cover25.0 Nm; 18.5 ft·lb
Cylinder head25.0 Nm; 18.5 ft·lb
Cylinder shield5.0 Nm; 3.7 ft·lb
Exhaust manifold / adapter19.0 Nm; 14.0 ft·lb
Flywheel nut135.0 Nm; 100.0 ft·lb
Flywheel fan16.0 Nm; 11.9 ft·lb
Fuel pump10.0 Nm; 7.4 ft·lb
Governor lever nut5.0 Nm; 3.7 ft·lb
Intake manifold to cylinder head10.0 Nm; 7.4 ft·lb
Muffler10.0 Nm; 7.4 ft·lb
Oil drain plug11.0 Nm; 8.1 ft·lb
Oil fill tube10.0 Nm; 7.4 ft·lb
Oil pump cover10.0 Nm; 7.4 ft·lb
Regulator / rectifier5.0 Nm; 3.7 ft·lb
Rewind starter3.0 Nm; 2.2 ft·lb
Rocker ball set screw or nut5.0 Nm; 3.7 ft·lb
Starter clutch88.0 Nm; 65.2 ft·lb
Starter motor16.0 Nm; 11.9 ft·lb
Rocker cover7.0 Nm; 5.2 ft·lb

Service Information

Engine
Max speed3,600 rpm
Valve clearance
Intake valve clearance0.08-0.13 mm (0.003-0.005 in)
Exhaust valve clearance0.13-0.18 mm (0.005-0.007 in)
Oil system
Oil typeAPI 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 plugChampion RJ-19LM
Spark plug gap0.7-0.8 mm (0.0276-0.0315 in)
ATTENTION! Dear visitors, this site is not a trading platform, an official dealer or a spare parts supplier, so we do not have any price lists or spare parts catalogs. We are an information portal and provide the technical specifications of gasoline and diesel engines.

We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. We do not provide advice on technical issues related to the engines operation or repair. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs.

Be the first to comment

Leave a Reply

Your email address will not be published.


*