Jackplates and extension on aluminum boats

Discussion in 'Metal Boat Building' started by Bobber1, Feb 23, 2005.

  1. Bobber1
    Joined: Feb 2005
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    Location: Tavistock

    Bobber1 Junior Member

    I have a new 1750 Crestliner Fishhawk with a Yamaha F115 fourstroke. The transom is a 25" and I have the longshaft motor. I know with glass boats a transom jackplate can make a difference in lowering drag from the lower unit and set the motor back in less turbulent water. My question is...is this safe to do on aluminum boats? It is an all welded hull and built for the weight of the motor but will the extra 6" offset hurt?

    Thanks in advance.
    Bobber
     
  2. Capt. Chris
    Joined: Feb 2005
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    Capt. Chris Junior Member

    Bobber,
    Adding a jackplate should be ok on your boat. Just don't plan on a transom bracket that would be trouble! The jackplates usually work better on lighter hulls and especially for the dough you will put out for a good one. You might not be happy with the little benefit you'll gain. Good luck and welcome.
    Capt. Chris
     
  3. Bobber1
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    Bobber1 Junior Member

    Sorry what do you mean by a transom bracket? The Jackplate I have is a Highjacker with a 4" adjustment for vert. and it provides 6" setback.
     
  4. Capt. Chris
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    Capt. Chris Junior Member

    Bobber ,
    A transom bracket actually bolts to the transom and sets your motor 18-29" back off the boat . Look at Stainless Marine, Gil Marine, Armstrong or Seamount to get an idea of what I mean. You need some serious transom for these brackets!

    Chris
     
  5. Bobber1
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    Bobber1 Junior Member

    Thanks for clearing that up Chris. 6" is a benefit 18" to 24" would be better but that would indeed put a strain on the transom.

    Thanks Again
    Bobber
     

  6. HelmetHead
    Joined: Mar 2005
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    Location: Clear Lake Texas

    HelmetHead Junior Member

    Bobber1,
    We have a jack plate on our flounder boat....sets motor 6" rearward from transom...and gives ~4" of vertical travel. Works great...no problems.
     
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