Lubricant coolers for marine engines

A marine engine comprising:

• a cylinder block comprising first and second banks of cylinders disposed along a longitudinal axis and extending transversely with respect to each other in a V-shape so as to define a valley there between;
• and a lubricant cooler located in the valley and extending parallel to the longitudinal axis, the lubricant cooler comprising a lubricant conduit that conveys engine lubricant parallel to the longitudinal axis and then transversely to the longitudinal axis to the cylinder block, and the lubricant cooler further comprising a cooling passage that conveys cooling fluid alongside the lubricant conduit to thereby cool the lubricant conduit and the engine lubricant therein, wherein the cylinder block comprises a plurality of bearings that are interdigitated amongst the plurality of cylinders, wherein the lubricant conduit of the lubricant cooler comprises a main lubricant passage that conveys the engine lubricant longitudinally through the lubricant cooler and a plurality of lateral passages that each transversely convey the engine lubricant from the main lubricant passage to a respective bearing in the plurality of bearings in the cylinder block, wherein the lubricant cooler comprises an elongated body that extends along the valley and a plurality of bosses that transversely extend from the elongated body and are mated with the cylinder block, and wherein the plurality of lateral passages extends through the plurality of bosses.