Home » Tony’s Tips » Articles » Engines & Components » Cummins Marine QSM11 Dry to Wet ConversionCummins Marine QSM11 Dry to Wet Conversion Note: This is only applicable to QSM11ās that you want to de-rate to 450HP at 2100- 2300 RPM or below… Typical applications are commercial boats that travel at hull speeds. Cummins Marine QSM11 Dry to Wet Conversion