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2. Universal Atomic 4 - Wikipedia

   en.wikipedia.org/wiki/Universal_Atomic_4

   A Universal Atomic 4, installed in a C&C 29 Mark 1 sailboat. The Universal Atomic 4 is a four-cylinder, gasoline engine produced by the Universal Motor Company between 1949 [1] and 1984 for use as auxiliary power on sailboats. [2] Both 18 horsepower (13 kW) and 30 horsepower (22 kW) versions of the engine were produced. [3]

3. Four-stroke engine - Wikipedia

   en.wikipedia.org/wiki/Four-stroke_engine

   Four-stroke cycle used in gasoline/petrol engines: intake (1), compression (2), power (3), and exhaust (4). The right blue side is the intake port and the left brown side is the exhaust port. The cylinder wall is a thin sleeve surrounding the piston head which creates a space for the combustion of fuel and the genesis of mechanical energy.

4. Marine propulsion - Wikipedia

   en.wikipedia.org/wiki/Marine_propulsion

   Many modern four-stroke medium speed diesel engines have a maximum operating speed of around 500 rpm. High speed: any engine with a maximum operating speed above 1000 rpm. 4-Stroke Marine Diesel Engine System. Most modern larger merchant ships use either slow speed, two stroke, crosshead engines, or medium speed, four stroke, trunk engines.

5. Wisconsin Motor Manufacturing Company - Wikipedia

   en.wikipedia.org/wiki/Wisconsin_Motor...

   All Wisconsin's products were 4-cycle and they had power outputs from 2.4 to 65.9 horsepower (2 to 49 kW). There were single, inline two, V-two, and V-four cylinder models. The engines were designed for outdoor field service in industries including agriculture, construction, marine, oil-field equipment and railway maintenance. [6]

6. Two- and four-stroke engines - Wikipedia

   en.wikipedia.org/wiki/Two-_and_four-stroke_engines

   The four-stroke engine is more efficient when running at full throttle, while the opposite is the case for the two-stroke engine. When a small car under heavy load runs at half speed, the engine automatically switches to the two-cycle mode, which is then more efficient. The research on this showed a 27% reduction in fuel consumption. [8] [9]

7. Total-loss oiling system - Wikipedia

   en.wikipedia.org/wiki/Total-loss_oiling_system

   These engines were designed to have a total-loss lubrication system, with the motor oil held in a separate tank from the fuel in the vehicle, and not pre-mixed with it as with two-cycle engines, but mixed within the engine instead while running. Castor oil was often used because it lubricates well at the high temperatures found in air-cooled ...