Mitsubishi Marine Engines
Horsepower RatingsTIER 1 REPLACEMENT
S6A3-Y1MPTA-3
483HP
S6A3-Y1MPTA
529HP
S6R-Y1MPTAW-3
590HP
S12A2-Y1MPTA-3
850HP
S12R-Y1MPTA
1180HP
S16R-Y1MPTAW
1568HP
TIER 2 REPLACEMENT
S6B3-Y2MPTK-4
429HP
S6A3-Y2MPTK-3
483HP
S6R-Y2MPTK-3
630HP
S12A2-Y2MPTK-3
940HP
S12R-Y2MPTK-3
1260HP
TIER 3
S6B3-Y3MPTAW-2
429HP
S6A3-Y3MPTK-4
543HP
S6R-Y3MPTAW-4
630HP
S6R-Y3MPTAW-1
684HP
S6R2-Y3MPTAW
803HP
TIER 4
S12R-Y4MPTAW-3
1260HP