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British Seagull 102 Plus
1959 - 1960



259

Description

The 102 Plus is a small, single-cylinder outboard engine produced by British Seagull since the mid-1950s. It is part of a large series of two-stroke marine engines built by the company for over fifty years. Thanks to their simple construction and renowned reliability, these engines have been widely used since the 1930s as both main and auxiliary engines on various types of pleasure craft. The 102 Plus features a large, four-bladed propeller, with a diameter of 330 mm. It is not a high-speed engine, but rather a power unit designed for a versatile use, capable of providing strong thrust and good efficiency at low speeds, up to approximately 8 knots. The 102 Plus is equipped with a freewheel mechanism and a clutch, which allows the propeller to be disconnected from the engine.

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Technical specifications

ManufacturerBritish Seagull Co., Poole (Dorset), United Kingdom, 1959–1960
Type102 Plus
DescriptionSingle-cylinder two-stroke outboard marine engine, with cast iron cylinder, aluminium alloy cylinder head and transmission housing
Stroke40 mm
Bore57 mm
Displacement102 cm³
Max. power output5 hp
Specific power output49.0 hp/litre
Induction systemcrankcase scavenged system with loop scavenging, with inlet and exhaust ports formed in the cylinder
Fuel feeding systempetrol-fed, with single-barrel carburettor
Ignition systemsingle spark plug supplied by a high-tension magneto
Cooling systemliquid-fed, forced by a centrifugal pump
Lubrication systempetrol–oil mixture (1:10 by volume)
Starting systemManual recoil starting by rope wound around the flywheel
Mass22 kg
Power-to-mass ratio4.4 kg/hp
Propeller transmission ratio4:1 through a reduction drive with a pair of bevel gears


Application

Small recreational boats

 

By kind donation of the heirs of Giuseppe Carrano

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