| 摘要 |
A seal construction for a pump of a small watercraft of the water jet propulsion type, the watercraft including a hull and a pump casing. A pumping passage for water jet propulsion is formed by the pump casing and a portion of the hull. The seal construction includes a flange formed on the pump casing, the flange having walls, and an elastic seal member liquid-tightly surrounding the periphery of the flange. The seal member has an outer periphery in liquid-tight contact with the inner surface of the hull portion where the pump is mounted. The flange and the seal member have parts for immovably engaging with each other.
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