The Briggs and Stratton 40G777 Professional Series is a 656 cc (40.0 cu·in) V-twin air-cooled four-stroke internal combustion gasoline engine, manufactured by Briggs and Stratton.
The B&S 40G777 engine has an OHV (overhead valve) design and a vertical PTO shaft. This engine is equipped with float type carburetor and an electronic ignition system. The B&S 40G777 engine used Dual-Clean air cleaner (paper element with a foam pre-cleaner).
The cylinder bore is 75.44 mm (2.97 in) and the piston stroke is 73.40 mm (2.89 in). This engine produced 20.3 PS (14.9 kW; 20 HP) at 3,600 rpm of horsepower.
The breakdown of the engine code is as follows:
- 40 – Displacement
- G – Basic design series
- 7 – Vertical PTO-shaft
- 7 – Plain bearing, Pressure lubrication
- 7 – Electric starter
|Model||B&S 40G777 Professional Series|
|Type||4-stroke, OHV, V-twin|
|Displacement||656 cm 3 (40.0 cu-in)|
|Max. horsepower||20.3 PS (14.9 kW; 20 HP) at 3,600 rpm|
|Fuel system||Float typet carburetor|
|Lubricating system||Full pressure lubrication system with spin-on oil filter|
|Starting system||Electric starter|
|Fuel tank capacity||–|
Cylinder Block and Head
|Bore x Stroke||75.44 mm X 73.40 mm (2.97 x 2.89 in)|
|Number of piston rings (compression / oil):||2 / 1|
|Valves:||4 (2 per cylinder)|
|Max speed||3,600 rpm|
|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 type||API SF, SG, SH, SJ or higher|
Summer: SAE 30, 10W-30
Winter: SAE 5W-30
|Oil capacity (with filter)||1.9 liters (2.01 US.qts, 1.67 Imp. qts)|
|Spark plug||Champion RC12YC|
|Spark plug gap||0.7-0.8 mm (0.0276-0.0315 in)|
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.
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