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The oil collects in sump (1), is withdrawn continuously by scavenge pump (2) and travels to the oil tank (3), where gases entrained in the oil separate and the oil cools. Gases (6) are returned to the engine sump. Pressure pump (4) forces the de-gassed and cooled oil (5) back to the engine's lubrication points (7).
These range from 2-, 3-, and 4-cylinder models generating 15 to 135 horsepower (11 to 101 kW) suitable for hulls up to 17 feet (5.2 m) in length to powerful V6 and V8 cylinder blocks rated up to 627 hp (468 kW)., [2] with sufficient power to be used on boats of 37 feet (11 m) or longer.
Core plugs are usually thin metal cups press fitted into the casting holes, but may be made of rubber or other materials. The most common metal plugs used in automotive engines are made from plated mild steels, stainless steels, brass or bronze. In some high-performance engines the core plugs are large diameter cast metal threaded pipe plugs. [3]
Piston engine with an automatically actuated intake valve (in red), and a cam-activated exhaust valve (in blue) The poppet valve is different from both slide and oscillating valves. Instead of sliding or rocking over a seat to uncover a port, the poppet valve lifts from the seat with a movement perpendicular to the plane of the port. The main ...
Expansion plugs are bronze to better fight corrosion. The head gasket's metal O-ring is also more corrosion resistant. [2] Examples of the opposite of a marinised car engine also exist, e.g. the 6,2 or 6,5 liter Detroit Diesel V8 engine found in Chevrolet and GMC utility vehicles was originally a marine engine adapted for automotive use.
Another example is the oil pan of an engine. The oil is used to lubricate the engine's moving parts and it pools in a reservoir known as its sump, at the bottom of the engine. Use of a sump requires the engine to be mounted slightly higher to make space for it. Often though, oil in the sump can slosh during hard cornering, starving the oil pump.