Marine propulsion – Means for accomodating or moving engine fluids – Cooling for engine
Patent
1997-03-19
2000-07-18
Basinger, Sherman
Marine propulsion
Means for accomodating or moving engine fluids
Cooling for engine
114 5551, 123 9031, 440111, B63H 2138
Patent
active
060899328
ABSTRACT:
A small watercraft includes a four-cycle engine which is arranged within a hull of the watercraft to enhance ventilation of and air induction into the engine. The hull includes at least one air duct which opens into an engine compartment within the hull at a level below an upper rim of the flywheel. A case cover of the flywheel assembly acts as a guide to direct at least a portion of the air flow, which enters the engine compartment at this location, upward over the engine and toward the engine's air intake. The engine also can be oriented to angle its output shaft relative to a keel line of the hull in order to provide ample space for a sufficiently sized flywheel assembly, as well as to decrease the distance between the bottom of the watercraft and the axis of the impeller shaft. As a result, the length from the gullet inlet and to the impeller is shortened to improve pumping efficiency and thus enhance thrust performance.
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Hattori Toshiyuki
Nanami Masayoshi
Basinger Sherman
Yamaha Hatsudoki Kabushiki Kaisha
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