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  1. J

    Twin engine, Match fuel consumption or RPM

    So I have a 24' TomCat with twin Mercury Command Thrust 115hp Out board engines, starboard engine is counter rotating. I use Mercury VesselView mobile for electronic engine feed back. When on step I usually match RPM but noticed the counter rotating (starboard) engine uses a lot more gas than...
  2. J

    Repower, prop sizing, TomCat 24

    Hello all, I’m looking for some advice specific to prop size. I have a 1998 C-Dory 24’ TomCat repowered to two Mercury 115 command thrust out boards, approximate boat weight with passengers and gear is about 6200 lbs. The mercury engines design spec for top end is 5800-6000 rpm. Looking at...
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