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how fast does your outboard-powered boat run?

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  • how fast does your outboard-powered boat run?

    I'm just curious to see what kind of mph's you guys are reaching with your outboard boats.. My first was a merc-force 90 which pushed my 18' bayliner 36 mph. my second a 115 v4 yamaha pushed my 20' wellcraft to only around 33mph..my current is a 150 omc on a 21 chris craft..i wasnt too impressed with my first two o/b's, but i picked up my current boat at a great price. I'm hoping to see some better performance and break the 45mph mark..obviously not all of your have your boats propped for top-end speed, but i'm just curious to hear what your running anyway
    Attached Files


  • #2
    Re: how fast does your outboard-powered boat run?

    You will not hit 45MPH with a 150HP sterndrive in the boat pictured. I do not think you will hit 40MPH, with that rig.

    My 21' Seaswirl with a 150HP Johnny OB struggles to hit 40MPH. My 18' SR I/O with a 205HPV6 hit 40 going downhill, with the wind.

    Speed increases take almost exponential power increases.

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    • #3
      Re: how fast does your outboard-powered boat run?

      Chris how much does your boat weigh? My boat in the pic is actually an outboard not a a stern drive. The outboard is under a hatch.The Boat is relatively light for the size between 22-2400lbs. And the rear 3' of my hull tapers up appearantly for less drag and quicker planing. I'm hoping to see 40+

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      • #4
        Re: how fast does your outboard-powered boat run?

        My 21' Seaswirl is listed at 2700#. Normally hulls are tapered down, right at the rear edge, a bit to help planing time.

        With the configuration of your boat, can you trim the motor. You will need max trim to get the speed you want.

        Comment



        • #5
          Re: how fast does your outboard-powered boat run?

          I have a 17' Xpress Aluminum bass boat with a 1998, 90 HP Yamaha that will do (on a dead calm day) 47 MPH at WOT. Not that I want to go that fast, but it is what it is. I don't do WOT for any more than a couple of minutes before backing it down. I usually do about 36 at 3/4 throttle.

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          • #6
            Re: how fast does your outboard-powered boat run?

            One of my boats is a 16 foot, 84 Bayliner Capri with an 85hp Force. The combined dry weight of hull and motor is 1000lbs. It will GPS into the low 40's but it doesn't have a tach. It'll embarass lots of newer 3.0 liter I/O's out of the hole then they catch up and walk away. (I realize that isn't much of a brag). The boat instantly gets on plane and up to top speed. The only reason it gets up that fast is because it is built feather light but you can't necessarily see the heft of a boat just by looking at it. We generally keep it propped for power however which takes a few clicks off.
            2003 Chaparral 183SS

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            • #7
              Re: how fast does your outboard-powered boat run?

              46 mph on GPS(Speedo was almost dead on surprisingly)CVX20 Sprint with a 150 Merc l6 soon to be 150 V6 unless I can trade the pair of them for a 200 hp.

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              • #8
                Re: how fast does your outboard-powered boat run?

                52 gps, 1979 checkmate Trimate II, 115 inline 6, only driver, 6 galons of fuel, no front or rear seats.

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                • #9
                  Re: how fast does your outboard-powered boat run?

                  40 mph GPS. Grady White 226 with hardtop, #5000, V6-200HP - 2-stroke
                  Grady White 226
                  200 Evinrude Ocean Pro
                  Evinrude Renegade Offshore Prop

                  Furuno FCV 587 Sounder
                  Garmin 4208 Multifunction Display
                  ICOM M504A VHF
                  Shakespeare Galaxy 5225-XT Antennas

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                  • #10
                    Re: how fast does your outboard-powered boat run?

                    62MPH at 6200RPM for my 16' lowprofile speedboat with a Merc 135V6. With a 23" prop and some tuning it will likely hit the low 70s', however, I don't want to go that fast in that boat.

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                    • #11
                      Re: how fast does your outboard-powered boat run?

                      about 8mph.
                      If I run into an oyster bed going much faster it might hurt the hull.

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                      • #12
                        Re: how fast does your outboard-powered boat run?

                        1979 Checkmate Eluder, 1990 Johnson 200. 62 mph at 6000 rpm. Based on information from other owners I should be able to get close to 70 with some more tweaking and a different prop.


                        1981 Bomber 15 ft fish-n-ski (fiberglass). 1981 Johnson 90. 43 mph at 5800 rpm.


                        (I wanna' hear from Faztbullet on this topic, I bet he's got some stories to tell)
                        Checkmate Rebuild: http://forums.iboats.com/forum/boat-...eckmate-eluder

                        “Anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that 'my ignorance is just as good as your knowledge.'”

                        ― Isaac Asimov

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                        • #13
                          Re: how fast does your outboard-powered boat run?

                          21' sea hunt CC deep v, bottom painted, Yam 150 2 stroke carbed. Hard to get 40. Trying lots of props lately but staying in basically the same range.
                          A man of constant boat tinkering.

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                          • #14
                            Re: how fast does your outboard-powered boat run?

                            how much do you think your bottom paint slows you down home cookin? my paint is half worn off. i personally HATE bottom paint. ruins the boats look & resale value and increases drag.
                            anyways i envy you guys running in the 50-60 mph's... makes me wanna go find a nice used 250 horse o/b

                            Comment



                            • #15
                              Re: how fast does your outboard-powered boat run?

                              you dont need more power, just less boat! i power to 50 with just a 115...on a 16' performance hull.

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