Ships – Motorized self-propelled waterski or waterscooter-type vehicle – Having hull compartment drain or vent
Patent
1999-09-27
2000-12-12
Avila, Stephen
Ships
Motorized self-propelled waterski or waterscooter-type vehicle
Having hull compartment drain or vent
440 88, B63B 3573
Patent
active
061583685
ABSTRACT:
A small planing personal watercraft including a hull, a straddle-type seat atop the deck of the hull, and a four cycle engine located internally of the hull is provided with one or more engine air intake tubes extending approximately horizontally in the hull in its normal flotation position. A carburetor supplying fuel to the engine intake air is located in the intake tube with a pivoting throttle valve located in the carburetor. The pivot axis of the throttle valve is oriented vertically relative to the carburetor and intake tube. An access opening is provided above the engine and various fuel control elements are disposed so they are readily accessible through the access opening. A carburetor may have an integrated fuel pump located on the upper side of the carburetor, fuel lines may be located on the upper side of the carburetor and a throttle control linkage including a cable sheave may be located on the top side of the carburetor, all of which will be readily available for expedited maintenance through the access opening above the engine. If the carburetor utilizes a fuel bowl having a float therein for controlling flow of fuel to the bowl, the pivot axis of the float may be oriented horizontally in a fore and aft direction or may extend transversely of the hull to avoid pitching or rolling motions affecting undesired flow of fuel into the fuel bowl. Precise control over fuel delivery is thus provided to enable maintenance over engine emissions.
REFERENCES:
patent: 3824975 (1974-07-01), Bastow
patent: 4160425 (1979-07-01), Curtis
patent: 5386145 (1995-01-01), Boswell
patent: 5846102 (1998-12-01), Nitta et al.
patent: 6027384 (2000-02-01), Nitta et al.
patent: 6029639 (2000-02-01), Mashiko
Avila Stephen
Yamaha Hatsudoki Kabushiki Kaisha
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