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Large Size Fin: 100+ HP, Boats Greater Than 18'

Large Size Fin: 100+ HP, Boats Greater Than 18'

Regular price $199.95 USD
Regular price Sale price $199.95 USD
Sale Sold out

SKU:Please Select Your Boat's Engine HP and Manufacturer to Determine the Bracket Angle.

Product Description

Guaranteed improvement in overall performance and handling

  • For boats 18 feet and greater, and outboards 100hp - 425 hp as well as Inboard/Outboard's (Stern Drives)
  • Get on plane faster
  • Plane at lower speeds and RPM settings
  • Improves performance, fuel economy and overall handling
  • Shields the propeller from damage due to underwater impacts
  • Reduces costly repairs to the propeller and lower unit gearing
  • Absorbs impacts 
  • Controls cavitation and porpoising
  • Fits on outboards and sterndrives
  • Simple Installation
  • Made from an energy absorbing compounded glass filled thermoplastic

Hydro Shield will get your boat on plane faster, allowing you to remain on plane at lower speeds and rpm's. It also improves handling and lowers your fuel burn at low and cruising RPM settings. Hydro-Shield will also protect your propeller from damage due to underwater impacts, and its 316th's marine grade stainless steel bracket system acts as a skeg guard, strengthening and reinforcing the skeg.

Made from an energy-absorbing plastic compound, Hydro Shield can withstand impacts, natural or man-made. Even if your boat strikes natural hazards like rocks, coral, oyster beds, or sandbars, or man-made hazards like lobster and crab pots, Hydro Shield maintains its integrity and protects your prop and skeg.

Hydro Shield is even easy to instal as the installation generally takes around 25 minutes for someone who has not installed one before, If you have any questions, please call or text us at (302) 650-4326.

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Customer Reviews

Based on 43 reviews
James Miller
Game changer

This really saved my prop this weekend with the low lake levels.

David Townsend
Turbo review

It arrived on time, thank you. I took it to my Marina for installation and they said it would not work properly on my party barge. I would like to return it, please advise.

Michael Leonard

Works just like they say and bolted right on looks clean as well.


Bought it for my Yamaha 250 SHO because I was impressed with the one my neighbor has. Going on my project boat and can't wait to put it in the water.

Brian Jones
Great so far

I have a Worldcat 255DC which is known to porpoise at certain speeds. The fins seemed to have really helped stabilize the boat at these higher speeds. The do not appear to have generated any noticeable drag. I also live on a shallow creek with some obstructions and lots of wildlife including Manatees so this was also a reason for purchase. The installation process was not difficult but the instructions showing using a ruler for alignment were a bit bizarre and seem prone to increase error depending on how/where you hold the ruler.