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 Defender Seal

Shaft Shark 300 Line and Weed Cutter

  • Keep your Prop Free from Rope, Weeds and Underwater Debris
  • Overall Diam.: 3.2", Split Design - No Prop Removal Required to Install
  • Select Shaft Diameter: 1", 1-1/8", 1-1/4", 25 mm or 30 mm
  • Item #: 
    Shaft Shark
    Model #: 
    SS 300
    Shipping Weight: 
    0.70 Lbs.
    List Price: 
    Our Price:
    Please enter quantity below.
    Shaft Diameter
    Model #
    25 mm
    SS 300-25MM
    Our Price: $377.99
    30 mm
    SS 300-30MM
    Our Price: $377.99
    SS 300-1
      *In Stock!*
    Our Price: $377.99
    SS 300-1.125
      *In Stock!*
    Our Price: $377.99
    SS 300-1.25
      *In Stock!*
    Our Price: $377.99
    Click the "More Info" button above for specific information about that product.

    The Shaft Shark is a serrated edge disc, machined from high quality type 316 stainless steel. The internal diameter is machined to fit the shaft diameter of your boat - either metric or standard. Attached to your propeller shaft, it rotates with the shaft, cutting anything that might try to become entangled around your shaft and prop. Shark Shaft cuts through lines, nets and other underwater debris as soon as it catches.


    • Keeps your propeller free from rope, weeds and underwater debris
    • Eliminates the need for towing due to fouled stern gear or propeller
    • Eliminates dangerous dives to clear your prop
    • Eliminates possible shaft and strut damage
    • Split design eliminates the need to remove propeller for installation
    • Does not require drilling of the shaft which can threaten shaft integrity

    Model Selection:

    The correct model for your boat will depend on your shaft diameter and your propeller hub diameter. For example, if the forward end hub diameter is 4.00 inches then you will need SS500 as this cutting area has a diameter of almost 5.00 inches. The SS400 is just less than 4.00 inches so there would be no "cutting area" extending past the hub diameter to cut the line.


    Installation is simple and quick. No drilling or tapping and no need to remove the propeller for installation. Can easily be installed underwater by a diver. The Shaft Shark requires just a small clearance fore and aft between the cutlass bearing and the propeller hub (see dimension "D" in diagram below). This dimension allows for sufficient clearance with the cutlass bearing for shaft movement when maneuvering and for water-flow through the cutlass bearing. Always install the Shaft Shark as close to the propeller as possible.

    Dimensions (See diagram below):

    Shaft Shark Model #
    WARNING: This product MAY expose you to chemicals, which are known to the State of California to cause cancer, birth defects and/or other reproductive harm. For more information go to


    Forespar LanoCote Prop & Bottom Foul Release
    Item #: 503281
  • Specially Formulated for Props and Underwater Running Gear
  • Provides Economical Protection Against Marine Growth for Up to Six Months
  • Size: 16 oz.
    Model #:
    ProMariner Shaft Brush
    Item #: 204673
  • Dimensions: 12" L X 1" W
  • Applications: Prop Shafts, Rudder Shafts, Flywheels, Etc.
  • Function: Eliminate Radio Frequency Noise from Rotating Shafts and Machinery
    Model #:
    WPT Dripless Moldable Packing
    Item #: 303726
  • Applications: Up To 1-1/2" Shafts*
  • Includes 1 ounce of Shaft Lubricant
  • Kit Requires (2) Rings of Standard Shaft Packing (Sold Separately)
    Model #:
    Martyr Grouper Style Universal Sacrificial Anode - Zinc
    Item #: 204317
  • Material: Zinc
  • Dimensions: 3" Wide x 7.75" Long x 1-3/4" Thick
  • Fish Shaped Sacrificial Anode with 15 Ft Vinyl Coated Cable and Alligator Clip
    Model #:

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