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DAVIS INSTRUMENTS
The Original Doel-Fin Hydrofoil

$35.99

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In stock online.
Model # 351221 | Mfg # 440

Get your boat on a plane quickly by increasing the lift generated by the engine. They also allow you to go more slowly while still remaining on a plane, so fuel consumption is decreased.

  • The injection-molded tenite polypropylene fins install easily on the cavitation plate of most outboards from 5 hp and up
  • Includes Mounting hardware
  • Lifetime warranty

The Original Doel-Fin Hydrofoil

Color Black
Compatibility Doel-Fin
Type Hydrofoils

REVIEW SNAPSHOT®

by PowerReviews
Davis Instruments The Original Doel-Fin Hydrofoil
 
3.9

(based on 10 reviews)

Ratings Distribution

  • 5 Stars

     

    (6)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (2)

70%

of respondents would recommend this to a friend.

Pros

  • Good performance (5)
  • Weather proof (4)
  • Easy to use (3)
  • Reliable (3)

Cons

No Cons

Best Uses

  • Small boats (4)
  • Boating / sailing (3)
  • Large boats (3)
    • Reviewer Profile:
    • Advanced (4), Casual/ recreational (4)
    • Was this a gift?:
    • No (7)

Most Liked Positive Review

 

Out of the whole on full plain, awesome!

They were installed on both my 150 hp Merc's and the performance was awesome. Out of the whole on full plain in a shot. Allowed the boat to maintain plain at a slower speed...Read complete review

They were installed on both my 150 hp Merc's and the performance was awesome. Out of the whole on full plain in a shot. Allowed the boat to maintain plain at a slower speed which was amazing. Found to be less cost than going with four bladed prop in this application.

VS

Most Liked Negative Review

 

Didn't fit

It didn't fit on my.LEHR 5hp propane outboard

One side did fit the other didn't I don't know why

It didn't fit on my.LEHR 5hp propane outboard

One side did fit the other didn't I don't know why

Reviewed by 10 customers

Displaying reviews 1-10

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3.0

I think the one piece design is better

By JR

from Tallahassee, FL

About Me Casual/ Recreational

Verified Buyer

Pros

  • Good Performance
  • Weather Resistant

Cons

  • Poor Design

Best Uses

  • Large Boats
  • Small Boats

Comments about Davis Instruments The Original Doel-Fin Hydrofoil:

Take your time to install. Recommend marking holes and drilling pilot holes before using the 1/4" bit needed. C clamps will help. Overall I think the one piece design offered by other types may be better.

  • Was this a gift?:
  • No
 
5.0

works very well. my boat comes up on plane very quickly now

By Possum

from Republic Ohio

About Me Advanced

Verified Buyer

Pros

  • Good Performance

Cons

    Best Uses

    • Small Boats

    Comments about Davis Instruments The Original Doel-Fin Hydrofoil:

    it dose as it was made for

    • Was this a gift?:
    • No
     
    1.0

    Does NOT fit ALL the motors specified

    By North Nomad

    from Hansville WA

    About Me Advanced

    Verified Reviewer

    Comments about Davis Instruments The Original Doel-Fin Hydrofoil:

    The package says this item fits all outboards from 5 hp. It won't fit my 6 hp Suzuki which has a very narrow anti-cavitation plate.

    • Was this a gift?:
    • No
     
    4.0

    Does what it says

    By Kc

    from California, MD

    About Me Casual/ Recreational

    Verified Buyer

    Pros

    • Good Performance
    • Reliable
    • Weather Resistant

    Cons

      Best Uses

      • Small Boats

      Comments about Davis Instruments The Original Doel-Fin Hydrofoil:

      Easy to install on my alpha one equipped 19' better hole shots and porpoising is no longer a factor.

      • Was this a gift?:
      • No

      (1 of 1 customers found this review helpful)

       
      5.0

      really works!

      By richie

      from long island ny

      About Me Advanced

      Verified Buyer

      Pros

      • Easy To Use

      Cons

        Best Uses

        • Boating

        Comments about Davis Instruments The Original Doel-Fin Hydrofoil:

        I had one on my old boat years ago and forgot how good they are. I would put it on a boat even if I did not have problems. it works that good

        • Was this a gift?:
        • No

        (2 of 2 customers found this review helpful)

         
        1.0

        Didn't fit

        By Pete

        from Ny

        About Me Casual/ Recreational

        Verified Buyer

        Pros

        • Easy Storage
        • Easy To Use
        • Waterproof

        Cons

        • Flimsy

        Best Uses

        • Boating
        • Canoeing

        Comments about Davis Instruments The Original Doel-Fin Hydrofoil:

        It didn't fit on my.LEHR 5hp propane outboard

        One side did fit the other didn't I don't know why

        • Was this a gift?:
        • No
         
        5.0

        What a difference with my boat motors performance!!!

        By Finny

        from Carlsbad, California

        About Me Casual/ Recreational

        Verified Buyer

        Pros

        • Easy To Use

        Cons

          Best Uses

          • Boating

          Comments about Davis Instruments The Original Doel-Fin Hydrofoil:

          I easily installed the Doel-Fin on my boat motor and less than 30 minutes later I was back on the water. Now my boat gets out of the hole more quickly and gets up to plane. I couldn't be more happy!!!

          • Was this a gift?:
          • No

          (2 of 2 customers found this review helpful)

           
          5.0

          worth the time and money to install

          By Captain Bob McDaniel

          from Quepos, Costa Rica

          About Me Professional

          Verified Buyer

          Pros

          • Good Performance
          • Reliable
          • Weather Resistant

          Cons

            Best Uses

            • Large Boats

            Comments about Davis Instruments The Original Doel-Fin Hydrofoil:

            This is the second set of Doel fins I have used. Had them on older 140 hp twin suzukis, when I put new 140 hp motors on the 29' dive boat with same props saw slow hole shot and having to work to keep it on plane. Put the new set on which took about 30 minutes in the water in the marina, and immediantly noted a improved hole shot under heavy load and planning out at lower rpms and steady . these work and work well on twin motors.

            (4 of 4 customers found this review helpful)

             
            5.0

            Performance as advertised

            By Jersey Bounce

            from Georgian Bay on Lake Huron

            About Me Advanced

            Verified Buyer

            Pros

            • Good Performance
            • Quiet
            • Reliable
            • Weather Resistant
            • Worked Effectively

            Cons

              Best Uses

              • 15 25 Hp Motors
              • Large Boats
              • Small Boats

              Comments about Davis Instruments The Original Doel-Fin Hydrofoil:

              At a friend's suggestion, I installed the hydro foils on both 15 and 25 HP outboards on 14 foot and 16 foot aluminum boats to lower the bow when driving alone in the rear of the boat. The hydrofoils solved the high bow problem, dramatically shortened the time and distance required to plane the boats and at a very low cost. Installation did take more than the 15 minutes suggested in the literature but was time well spent! Am purchasing two more hydrofoils for friends who are having the same issue I used to have.

              (11 of 13 customers found this review helpful)

               
              5.0

              Out of the whole on full plain, awesome!

              By Capt. Gary

              from Galveston Bay and Gulf of Mexico, Texas

              About Me Professional

              Verified Reviewer

              Pros

                Cons

                  Best Uses

                  • 24' Center Console

                  Comments about Davis Instruments The Original Doel-Fin Hydrofoil:

                  They were installed on both my 150 hp Merc's and the performance was awesome. Out of the whole on full plain in a shot. Allowed the boat to maintain plain at a slower speed which was amazing. Found to be less cost than going with four bladed prop in this application.

                  Displaying reviews 1-10

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