The Briggs and Stratton engines that produce 16 horsepower are the vertical and horizontal 14-16 Gross HP V-Twin Horizontal & Vertical Shaft Vanguard engines. Each engine also comes with options for customers. These engines are used in utility vehicles, commercial lawn mowers and golf and turf equipment.
The engine is a V-twin (has two cylinders) with 479 cc (cubic centimeters) (29.23 cu in) of displacement. The bore and stroke of the engine is 2.68 inches (68 mm) by 2.60 inches (66 mm), where the bore is the diameter of the engine cylinder opening and the stroke is the total distance the piston travels up and down. The compression ratio, the ratio of the volume between the piston and the cylinder head before and after a piston stroke, is 8.2 to one.
The engine is air-cooled and the lubrication system uses a spin-on oil filter. The engine block itself is made of aluminum alloy with a cast-iron sleeve and the crankshaft is made from ductile iron. The starter motor uses a rewind or electric start and the engine complies with Environmental Protection Agency (EPA) regulations as of November 2010.
The horizontal version is 10.98 inches (279 mm) long, 16.14 inches (410 mm) wide and 17.24 inches (438 mm) high. The vertical model is 16.89 inches (429 mm) long, 15.91 inches (404 mm) wide and 12.20 inches (310 mm) high.
The engine weighs 72 lbs. (32.7 kg) and it has an oil capacity of 57.5 oz. (1.7 liters).
The technical features that come standard on the 16 hp OHV (overhead valve) engines include a low oil shutdown feature called Oil-Gard, Magnetron electronic ignition to improve the dependability of engine start and lightweight pistons with optimized complaint ring package, which the manufacturer claims reduces wear, emissions, engine noise and oil consumption.
For the horizontal model, an idle-down system is available that lowers revolutions per minute when the engine is not required to produce power. The horizontal model can also feature a key switch, a speed sensor and a tapered, straight key or threaded crankshaft. Options for both the horizontal and the vertical model include a heavy duty or solenoid starter, extra noise mufflers, an oil pressure switch, a cyclonic air cleaner and a high-speed enrichment carburetor. Various alternators are available, from 16 to 25 amps. For California use, the engines can have CARB Compliant Purge Ports to comply with emissions standards as set by the California Air Resources Board.
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