1. sharpw, Jul 17, 2012

   #1

   

   sharpw New Member

   Joined:

   Jul 9, 2006

   Messages:

   5

   Location:

   DC

   I am about to go on a trip down the Potomac then into the Chesapeake. Do you think I'd use more gas by going 20 MPH (about 3600 RPM) for 5 hours or 10 MPH (about 2400 RPM) for 10 hours? I have the dual 6.2 MPI on the boat.
   
   Thanks
   Skip
2. talexander38, Jul 18, 2012

   #2

   

   talexander38 Member

   Joined:

   Dec 18, 2009

   Messages:

   107

   Location:

   Va. Beach / Deltaville Va.

   I'd have to say you'd use more at the lower speed, at 10 knots the boat will be pushing water instead of planning, and your hull speed should be around 6 knots which would be the best for mileage
3. OutlawNTexas, Jul 18, 2012

   #3

   

   OutlawNTexas Member

   Joined:

   Oct 19, 2010

   Messages:

   34

   Location:

   League City, TX

   I have a '98 359 Mariner with 454 Crusaders and can tell you for a fact that at 12 knots I use 1.5 gal/mile, 14 kts (on plane) almost 2 gal/mile and at 8 kts 1 gal/mile...
4. OutlawNTexas, Jul 19, 2012

   #4

   

   OutlawNTexas Member

   Joined:

   Oct 19, 2010

   Messages:

   34

   Location:

   League City, TX

   Sorry, thats 350 Mariner...

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