6.2L 300

The 6.2L 300 is the entry rating of the 6.2-litre V8 Mercury designed in-house for marine use and introduced in September 2015. It is a 377 cu in (6.2 L) 2-valve pushrod V8 that shares about 65 percent of its parts with the 4.5L V6, and is not a marinised GM LS or a carry-over 5.7 small-block. The 300 and 350 hp sterndrive/Horizon ratings are calibrations of one block; WOT is 5000–5400 rpm on both. This 300 hp rating is the current-generation replacement for the 300 hp 5.7-litre 350 MAG. Do not confuse it with Volvo Penta's V8-300, and do not call it a 350 MAG.

Mercury catalogs the same 300 hp designation as a Bravo One/Two/Three sterndrive and as a 6.2L Horizon inboard. Bravo Four S also pairs with the 6.2L. TowSport inboards on this block are separate T6200 ratings at 320 and 370 hp and are not this row.