[ES]
El motor estandar es un Perkins Range 4 M 90, de cuatro cilindros diesel de 80cv a 2,400 rpm. La helice es de bronze de dos hojas de 24 pulgadas. El motor se encuentra en un cuarto totalmente insulado con luz, justo detras del salon con acceso por un lado o desmontando una serie de paneles del alrededor, dependiendo de el plan de acomodacion.
El 55 que vimos e inspecionamos es un sueño hecho realidad para un mecanico. El motor tiene un sistema de carta cerrada pues no puede ver caidas y perdidas de aceite. Tiene drenajes que llevan la meteria desde partes del barco a la seccion principal de drenaje que esta justo encima de la quilla.
Tipico de llevar electronica que requiere mucha potencia electrica, el sistema del Oyster es de 24-Voltios DC. Las batterias del barco estan repartidas en cuatro batterias de 6-voltios de 20 horas, que ofrecen approxcimadamente 230 amperes-hora a 24 voltios, que se convertirian en 460 amperes-hora en un sistema mas familiar de 12 voltios.
La baterias son de carga pesada de tipo Varta. Las baterias de arranque consisten de dos baterias de 12-voltios que ofrecen 88 amperes-hora en sistema de 24 voltios. La carga es de 40 amperes a 24 voltios con el alternador del barco (80 amperes a 12 voltios) and un isolador de diodo.
[EN]
The standard engine is a Perkins Range 4 M 90 four-cylinder diesel rated at 80-horsepower at a satisfyingly low 2,400 rpms. It turns a two-bladed 24-inch bronze propeller by way of a 1.5-inch stainless shaft.
The unit sits on flexible mounts in a large, fully lit insulated engine compartment just aft of the main saloon with walk-in access on one side and a series of removable panels all around, depending on the accommodations plan; the 55 we inspected was a mechanics dream come true.
Sensibly, the engine sump is self-contained to control oil spillage. Sealed limber tubes bypass the area to convey normal uncontaminated bilge water from the after portion of the hull forward to the main sump at the keel.
Typical of many European high-load marine-electrical systems, the one aboard the Oyster is 24-volt DC. Storage for the house bank is in four six-volt 20-hour-rated batteries offering approximately 230 amp-hours at 24 volts, which would translate into 460 amp-hours in our more familiar 12-volt vernacular. The batteries are heavy-duty deep-cycle Varta type.
The engine start bank consists of two 12-volt batteries offering an 88-amp-hour 24-volt supply. Primary charging is by way of a 40-amp 24-volt engine alternator (80 amps at 12 volts) and diode isolator.
Onboard AC power is provided by a three-cylinder Westerbeke model BTD 8 220-volt generator located in an insulated compartment beneath the cabin sole just forward of the engine area. This unit is started by and charges its own single 12-volt start battery. It can be used to fortify the DC system through a Victron 50-amp 24-volt battery charger, which is adapted also for dockside juice.
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