GLF Posted March 14, 2007 Share Posted March 14, 2007 Its hard to determine the fuel mileage of a boat, when you run, troll, then run back in. With a GPS, you can get an idea of the mileage for the day, but it is inaccurate when you figure you trolled for X amount of hours. At what RPM are you getting your best mileage? Notice I did not say mpg. Link to comment Share on other sites More sharing options...
captain_crabass Posted March 14, 2007 Share Posted March 14, 2007 Mike, you got a helluva boat, now spend some more money on a Flocscan or Navman fuel use guage, mine paid for itself more than once, along with a GPS you can find the most efficient cruising speed, I try to run about 2900 rpms, only lost 4 mph from 3100, BUT, I use 6.0 less gph. At 2900 I burn 11 GPH at a bit over 25 mph, Thats better than 2 mpg, and Im not bitchin about that with a a big block and 7000 lbs of boat, these numbers may be off a few tenths as Im old and am relying on memory, or lack thereof Link to comment Share on other sites More sharing options...
CaptLevi Posted March 14, 2007 Share Posted March 14, 2007 I set Sporty's 350 Chevys at 2800 for optimum gph cruisin. When I want to go I bump em up to 3600 or so. Link to comment Share on other sites More sharing options...
Priority1 Posted March 15, 2007 Share Posted March 15, 2007 My 22 foot Islander is light, and I only have a 140 HP 4 cyl Mercruiser. Most fishing trips I average about 1 to 1-1/2 gal per hr. If I limit fast the GPH rate goes up because the ratio of run time to trolling time. I never run wide out unless I have to. I get it on plane and pull the throttle back to just maintain it. I spend a lot more time trolling, than I do running. I spend a lot of time making sure everything is in top running condition. Link to comment Share on other sites More sharing options...
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