▁the ▁market place ▁to ▁offer ▁balance ▁sh aft ▁technology , ▁which ▁made ▁for ▁a ▁sm o other ▁running ▁engine . ▁Later , ▁B MW ▁Marine ▁modified ▁the ▁two ▁larger ▁models ▁to ▁reduce ▁the ▁cor ros ion ▁damage ▁caused ▁by ▁salt ▁water ▁cool ing . ▁The ▁new ▁models ▁were ▁renamed ▁the ▁D ▁ 3 5 - 2 ▁and ▁D ▁ 5 0 - 2 . ▁Many ▁of ▁these ▁auxili ary ▁engines ▁found ▁their ▁way ▁into ▁both ▁racing ▁and ▁cru ising ▁sail bo ats ▁made ▁by ▁companies ▁such ▁as ▁S 2 , ▁Pear son , ▁Jon mer i , ▁and ▁Hans ▁Christian . ▁Custom ▁y acht ▁build ers , ▁such ▁as ▁L yman ▁Mor se ▁in ▁the ▁USA , ▁also ▁installed ▁B MW ▁Marine ▁engines ▁in ▁their ▁boats . ▁ ▁B MW ▁Marine ▁consp ic u ously ▁needed ▁a ▁large ▁dies el , ▁especially ▁to ▁comp ete ▁in ▁the ▁European ▁power ▁boat ▁market . ▁The ▁company ▁s our ced ▁engines ▁from ▁VM ▁Mot ori ▁in ▁Northern ▁Italy . ▁The ▁VM ▁H R . H ▁ 6 9 2 ▁block ▁became ▁the ▁basis ▁for ▁the ▁next ▁series ▁of ▁B MW ▁Marine ▁engines . ▁Most ▁gas oline ▁and ▁dies el ▁internal ▁comb ust ion ▁engines ▁b olt ▁the ▁c rank sh aft ▁onto ▁the ▁bottom ▁of ▁the ▁c rank case . ▁The ▁V m ▁Mot ori ▁engines ▁were ▁unusual , ▁in ▁that ▁they ▁incorpor ated ▁the ▁c rank sh aft ▁inside ▁the ▁c rank case . ▁ ▁This ▁type ▁of ▁construction , ▁sometimes ▁seen ▁in ▁racing ▁car