A marine instrument, such as a clock, barometer, or thermometer, has a face having indicia associated with the face, an instrument movement, and at least one hand having a direct or indirect connection to the movement and positioned to move with respect to the face, or a display connected to an electronic movement. The components are encased within a casing that is water tight to at least 12 inches (e.g. about 30 feet) of water. A vent, such as a porous plastic plug, allows the passage of air in...

A marine engine has a crankcase and a cylinder bank. An upper end of the cylinder bank defines a plane. A cylinder head is connected to the upper end of the cylinder bank. A crankshaft is disposed in the crankcase. A pump is operatively connected to the crankshaft so as to be operatively driven thereby. A center of the pump is disposed above the plane defined by the upper end of the cylinder bank. In another aspect, a marine engine has a crankcase and a crankshaft. A starter ring gear is dispose...

A marine fender for protecting a marine structure and watercraft against damage from collision forces. The marine fender includes an elongate body of resilient material having a basal wall dimensioned and configured for mounting the marine fender on the marine structure, and an outer wall for being engaged by a collision force, the basal wall and the outer wall defining an inner space. A web within the inner space is integral with the basal wall and with the outer wall, and has a generally M-sha...

A muffler for use with high performance powerboats to reduce exhaust noise to below 90 decibels without significantly reducing horsepower is described. The muffler includes a cylindrical outer housing with an interior cavity that is divided into first and second chambers by parallel intake and discharge cylinders. The intake cylinder has intake and discharge ends, and inwardly directed louvers toward the intake cylinder discharge end. The abutting discharge cylinder has inner and discharge ends,...

The marine structure includes a platform above a body of water and having at least three spaced upright supporting legs extending downwards from the platform towards the body of water, at the lower side of which a suction pile is connected wherein each supporting leg is connected to the relevant suction pile externally from its longitudinal axis. The supporting leg laterally projects outside the radial circumference of the suction pile while the suction piles and the supporting legs are mutually...

Marine structure with one or more suction piles for embedment into the subsea bottom and with buoyancy sufficient such that the structure can be transported over water independently floating, including in an upright position, wherein the buoyancy is concentrated near the suction piles, and may be substantially in line with the suction piles, and wherein the buoyancy is such that if the suction piles touch the subsea bottom with their undersides, at least part of the buoyancy projects above the w...

A marine fender has high bonding strength between a high-slip synthetic resin plate such as an ultrahigh-molecular-weight polyethylene plate and a rubber fender member, and quite long life-time of the high-slip synthetic resin plate. The high-slip synthetic resin plate and a rubber layer are previously welded to each other. The high-slip synthetic resin with the rubber layer and the rubber fender member are welded to each other by vulcanization. In this way, the marine fender is made.

A marine anchor for recreational boats comprising a rotating hub, with a plurality of flukes extending outward, and a substantially right-angle shaped bail member including five bail positions for receiving a slidable shackle of an anchor chain. The first bail to shakle position is the anchored position. The second bail to shackle position allows for a conventional retrieval of the anchor from above the location of the set anchor. An alternate retrieval can result in a third bail to shackle posi...

A marine vessel comprises at least one hull stabilized by at least one pair of outboard sponsons and propelled by propulsion means carried by the sponsons or hull. One aspect of the invention is shown in FIG. 7, where a marine vessel (20) is provided with first second pairs of outboard sponsons (230, 231), with the first pair (230) disposed forwardly of the second pair (231). The sponsons (230) of the first pair are disposed at a higher level than the sponsons (231) of the second pair. At the lo...

A two-cycle, multi-cylinder engine maintains roughly equal temperatures between cylinders, despite differing exhaust efficiencies between the cylinders. Several ways of reducing the temperature of one of the cylinders in comparison to the other are disclosed. One embodiment involves supplying more coolant to the cooling passages around the hotter running cylinder. Other ways involve reducing the compression ratio or retarding ignition timing in the hotter running cylinder in comparison to the ot...