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  1. 10-09-2018, 06:02 AM #1
    Circusboy
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    Different pad to prop question

    What is the difference in performance between 3.5" p to p if you have a 10" setback, 6" setback or transom mount on the same hypothetical boat?

    I was just curious, I'm chasing some issues on my boat and was thinking about removing my jackplate.
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  2. Casslaw
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    #2 10-09-2018, 12:12 PM
    That answer depends on SO many variables..boat length and width, Hull design, engine size, weight...all kinds of stuff that’s way over my head. In my opinion BBC has so many people that have had just about every combo available. If you really want to know what Your boat runs best with, put the specific name/hull design in your question and these guys will tell you exactly how much set back that hull/engine size requires.
    2006 Triton SP-185, 2006 Evinrude Etec 90, PowerTech NRS3, Garmin Echomap Plus 73CV & 93SV
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  3. Rip Bass
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    #3 10-09-2018, 06:25 PM
    Like Casslaw said,too many variables to think about. There’s no set formula to go by.
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  4. Circusboy
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    #4 10-09-2018, 06:49 PM
    2018 G3 Bay 22 DLX. 250 ox66, 112lbs m.k., 3 batteries and a charger in the console. With the motor mounted directly to the transom, 2nd hole, P to P was 6-1/2" 21P 3-blade went 57 mph at 5400 rpm. with the 10" jackplate p to p at 4.5" went 57 mph at 5800 rpm. i'm now p to p at 3.5" with 23P 4 blade running 57.4 at 5600 rpm.
    I have a 23P 3 blade on the way, if i can't get 60 mph, i'm gonna mount the motor on the transom at 4.5 p to p and just leave it alone.

    The only difference i've seen the jake plate make is lower water press, which I expected, and the boat riding higher in the water. I would have thought this boat would be a lot faster with the 250. i was curious if the setback was effecting me speed.
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  5. mdtritn21
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    #5 10-10-2018, 11:31 AM
    It was actually doing better bolted to the transom.. You don't have a pad so the plate won't help much any way. Did you try the 21" prop higher on the transom?
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  6. Circusboy
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    #6 10-10-2018, 04:19 PM
    no sir. i'll prob. end up 23P 3 blade. transom mount at 4.5" p to p. if not than the 21P 3 blade
    Last edited by Circusboy; 10-10-2018 at 04:27 PM.
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  7. Circusboy
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    #7 10-14-2018, 06:52 AM
    ended up removing jackplate and running 21P 3-blade prop.
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  8. jarhead175
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    #8 10-14-2018, 10:10 AM
    It changes the pivot point of the boat and it allows the lower to be raised higher in the rise of wake behind the boat. Some lighter hulls run best with the lower higher in that rise most don't.
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