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MARTYR
Clamp-on Grouper Anodes

Supplements your boat's existing anodes

An excellent anodic device to supplement a vessel’s existing anode system, especially to counteract stray current from defective shore power. Choice of Zinc or Magnesium.

  • Clip to bolt on outdrive
  • Clip to grounding strap if possible or wire items together with copper wire and clip to wire
  • Do not connect to negative battery terminals
  • Dimensions: 8 1/4"L x 3 1/4"W x 1 3/8"D
  • Cable length 15'
Product Models
Description WM Model # MFG Part # Availability Price Quantity  
Clamp-On Grouper Anode, Zinc 485144 CMGROUPER
In stock online.

$44.99

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Clamp-On Grouper Anode, Aluminum 14788558 CMGROUPERA
In stock online.

$43.99

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Clamp-On Grouper Anode, Magnesium 11520301 CMGROUPERM
In stock online.

$72.99

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Product Description

Supplements your boat's existing anodes

An excellent anodic device to supplement a vessel’s existing anode system, especially to counteract stray current from defective shore power. Choice of Zinc or Magnesium.

  • Clip to bolt on outdrive
  • Clip to grounding strap if possible or wire items together with copper wire and clip to wire
  • Do not connect to negative battery terminals
  • Dimensions: 8 1/4"L x 3 1/4"W x 1 3/8"D
  • Cable length 15'

Specs

REVIEW SNAPSHOT®

by PowerReviews
MartyrClamp-on Grouper Anodes
 
4.1

(based on 8 reviews)

Ratings Distribution

  • 5 Stars

     

    (5)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (1)

80%

of respondents would recommend this to a friend.

Pros

  • Easy to use (5)

Cons

No Cons

Best Uses

  • Boating / sailing (4)
    • Reviewer Profile:
    • Advanced (3)
    • Was this a gift?:
    • No (4)

Reviewed by 8 customers

Displaying reviews 1-8

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5.0

well made, long cable, easy to use

By tap

from seattle

About Me Advanced

Verified Buyer

Pros

  • Compact Design
  • Easy To Use

Cons

    Best Uses

    • Boating

    Comments about Clamp-on Grouper Anodes:

    Added protection, I live in a "hot" marina between two steel hulls.

    • Was this a gift?:
    • No

    (1 of 1 customers found this review helpful)

     
    5.0

    Lift Saver

    By Maohaus

    from Punta Gorda, Florida

    About Me Casual/ Recreational

    Verified Buyer

    Pros

    • Easy To Use

    Cons

      Best Uses

      • Boating

      Comments about Clamp-on Grouper Anodes:

      Our lift manufacturer recommended this item to reduce/slow down the deterioration of the galvanized lift legs in our brackish salt water canal. The anodes took less than a minute to install. I would recommend that you keep the clamp area clean and reseated from time to time to ensure a good connection.

      • Was this a gift?:
      • No
       
      5.0

      Its a zinc.

      By Bob

      from Florida

      About Me Advanced

      Verified Buyer

      Pros

      • Compact Design
      • Easy Storage
      • Easy To Use
      • Safe
      • Waterproof

      Cons

        Best Uses

        • Boating

        Comments about Clamp-on Grouper Anodes:

        It's a zinc. No big deal it's just an overpriced hunk of metal.

        • Was this a gift?:
        • No

        (1 of 1 customers found this review helpful)

         
        3.0

        Poor quality of alligator clip makes fail in saltwater

        By Alerion Chuck

        from Santa Cruz

        About Me Advanced

        Pros

        • Easy To Use

        Cons

        • Unreliable

        Best Uses

        • Boating

        Comments about Clamp-on Grouper Anodes:

        For the Grouper to work, it has to have a low resistance connection to the boat's bonding system. If the connection has resistance, the Grouper won't act as an anode and it fails to do its job. The current alligator clip on the end of the vinyl wire is apparently made out of steel, with a copper electroplating. This causes corrosion which not only bleeds rust onto the deck, but also insulates the connection.

        I think there's the opportunity to put some sort of clamp on the wire that would allow the grouper to be suspended over the side, while not putting tension on the alligator clip.

        In generally, this is a good way to get a lot of anodic material in the water, connected to your boat, so that your normal anodes last longer. However, the clip has to be improved.

        Service and delivery comments:

        Bought at Santa Cruz Store.

        • Was this a gift?:
        • No

        (1 of 1 customers found this review helpful)

         
        5.0

        ELECTROLYSIS ELIMINATOR

        By WHERESTHEACTION

        from DANA POINT CALIFORNIA

        About Me Professional

        Verified Buyer

        Pros

        • Easy to Install
        • Easy to Use
        • Protects Well

        Cons

        • None

        Best Uses

        • OUTDRIVES

        Comments about Clamp-on Grouper Anodes:

        Want to eliminate electrolysis on your outdrive? Then, this product is for you! Boats that are berthed in salt water conduct electronic currents that are in salt water and these currents erode metals that touch the water. This product absorbs those electrolytes and keeps them away from other base metals. As time passes, this device becomes smaller and smaller as it is eaten away so you know it works.Can you picture your outdrive being eaten away in this fashion? Cheap insurance for a reasonable price.....get it now!

        (1 of 1 customers found this review helpful)

         
        4.0

        Perfect for the end of a ...

        By Terry

        from Undisclosed

        Comments about Martyr Clamp-on Grouper Anodes:

        Perfect for the end of a season. When there is only a couple of weeks left in the year. You don't have to haul the boat to be protected. Just clip this bad boy on and you are good to go a couple more weeks.

        (2 of 3 customers found this review helpful)

         
        5.0

        What an amazing product - ...

        By Jeff

        from Undisclosed

        Comments about Martyr Clamp-on Grouper Anodes:

        What an amazing product - so simple and works great!

        (9 of 9 customers found this review helpful)

         
        1.0

        I have used this for at ...

        By Joe

        from Undisclosed

        Comments about Martyr Clamp-on Grouper Anodes:

        I have used this for at least 5 years. It used to last until the fish melted to about three inches long still attached to the cable. I just returned one to the store with the fish almost the original length and width but with three of the four cable strands disattached waiting for the fourth to let go. It appears the manufacturing process has changed in the last two years by moving the cable attachment outwards to the side as opposed to being in the core. The life expectancy is therefore reduced by at least 50% due to the failed cable connection.BUY IT BUT BE AWARE.

        Displaying reviews 1-8

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