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Upgrading-Long Shaft vs. Short Shaft

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  • Upgrading-Long Shaft vs. Short Shaft

    I'm looking to repower my 14' Sea-Nymph 14R with a Honda 15 H.P. and just wanted to know any considerations I may be unaware of about using a long shaft vs a short shaft outboard. Thanks in advance for your help and tight lines to all!


  • #2
    Re: Upgrading-Long Shaft vs. Short Shaft

    Howdy TT.You need to use the one that matches your transom height. Short=15", Long=20"Red sky at night. . .JB
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    • #3
      Re: Upgrading-Long Shaft vs. Short Shaft

      The Honda 15 you want to re-power with can come in a short (15" shaft), long (20" shaft), or extra long (25" shaft).All 14' Sea Nymphs (Lowe/Genmar) either have transoms for 15" or 20" shafts with hp ratings from 15 to 30 depending on model.Here's their web site to check your model: http://www.lowe.com/FishBoats/Utility/SeaNymph/ Or...you can always measure the transom itself. It should be either 16" or 21".The only disadvantages to using a long shaft on a short shaft transom are more water drag by the extended shaft which means slightly slower speeds, a little added weight, the inability to run in shallower waters, and a bit more expense in fuel use and purchase price. Otherwise you won't hurt a thing.

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      • #4
        Re: Upgrading-Long Shaft vs. Short Shaft

        J.B. is right. You must match your transom. A long shaft motor put on a short transom can cause grief. I've seen water curl in and flood a friends boat cause of too much engine in the water....Even in a small HP engine, the extra drag from too much in the water will slow you down.....
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