Repowering a 2006 keywest 268 prop ideas

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  • Repowering a 2006 keywest 268 prop ideas

    Currently running twin f150s running enertia 15.3x15 props,repowering with twin f250s all the bulletins show 3 blade yamaha 15 1/4 x19 for most boats similar to mine...i really am a believer in the merc props and suggestions on where to start?

    thanks

  • #2
    Are they 15 x 15 Enertia's or 15.3 X 14 Enertia's ?
    Are the new motors the 3.3L F250's or the newer 4.2L F250's ?

    Just curious, what was your wide open RPM and GPS speed with the Enertia's and your F150's ? (with the boat loaded up like you actually run it most of the time)

    The performance reports I see are suzuki, they are claiming 47/48 MPH at wide open with twin 150's or single 300
    https://books.google.com/books?id=co...%20MPH&f=false
    But if you were running 14 or 15 pitch Enertia's, then you were likely loading heavier and not getting those speeds. which will change what you would want on the new 250 HP motors.

    If we go off the Suzuki reports and 300 HP pushes it 47 MPH, 500 HP will push it 61 MPH. (with a similar load to what they had in that report)

    What speed do you like to cruise? are you looking for the most speed, or the best economy? do you load the boat heavy with gear fuel and people, or are you just cruising with a lighter load?
    Let us know which F250's your getting and what speed you got with the F150's



    Ken Reeves
    [email protected]
    941-735-5808

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    • #3
      15.3x14/ enertia

      always loaded heavy,can see 5800 and 38-40 ..

      cruise now around 27-30..4300-4500

      these are the 4.2L

      we high speed troll for wahoo alot and it is tough on the 150s to maintain 15-17 mph,they do it better now than ever.3000 hrs...

      not looking for speed,just better cruise and when its rough it will be nice not to have to jocky the throttles as much

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      • #4
        If 300 runs 40, 500 will go 50, and I'd try some 17 pitch.
        I'd want you to test some Quicksilver Q4 17's and see what happens.
        If it surprises us on speed, maybe you will need 19's, but from your numbers I'd start with 17's.

        Ken Reeves
        [email protected]
        941-735-5808

        Comment


        • #5
          Thank you..

          what about rev4s?

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          • #6
            The Q4's and the Revolution 4's are the same prop. Quicksilver/Mercury same company, same prop.

            Ken Reeves
            [email protected]
            941-735-5808

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            • #7
              Thank you..

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              • #8
                Ok got the new motors and the first props they put on were 15 1/4 x19.solas lexor..no go,port would blow out on acceleration did get to 52mph and 5500 trimmed up all i could.
                next they gave me 14 1/4 x17 4 blade solas props,much better,could accelerate good,trimmed way up saw 5800-5900 and 51-52 in the calm icw..

                alright ran them in the ocean,loaded like we fish..heavy..it was very rough,grip was great on acceleration,no blow out25 mph saw 3700-3800..it was rough.slip numbers are high but it was stupid rough.

                following sea they hated....high speed trolled 16mph no problem..

                i will try to get more numbers tomorrow after we weigh in our fish and refuel.

                would a 15 1/4 x17 powertech ofs4 be better or would the diameter be too much?a friend said i need to find some 15 1/4 4 blades there are not many options.

                i would like to improve the mileage,its actually worse than the old 150s

                thanks ken

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                • #9
                  OFS4 17's would be a decent option if you want more sternlift.
                  The Quicksilver Q4 would still be a great option as well. also 17 pitch if you plan to load for fishing most of the time.
                  Fuel economy will be close, doubt your going to see much improvement.
                  I your shooting for fuel economy, the Mercury Enertia ECO 16 x 17 3 blades would be a fun set to try.

                  Ken Reeves
                  [email protected]
                  941-735-5808

                  Comment

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