Skip to content Skip to navigation menu
Live Chat

MARTYR
Engine Cooling System “Pencil” Anodes

Protect your engine against galvanic corrosion by changing its anode regulary.

Anodes may be purchased as a complete assembly (anode with brass plug) or as a replacement anode only. Threads for replacement anodes (which screw into the plug) are “NPT.” Outside threads for plugs (which screw into the engine block) are “UNC”. “Length” refers to visible portion of anode when installed in plug. Offered in zinc alloy only.

Product Models
Description WM Model # MFG Part # Availability Price Quantity  
Anode with Plug, Length: 1 1/8", Diameter: 3/4", NPT: 3/8", UNC: 8mm (Fits Yanmar) 593501 CM272100200300Z
In stock online.

$4.99

Add to My List
Anode with Plug, Length: 1 3/4" (45mm), Diameter: 3/8" (10mm), NPT: 1/4", UNC: 5/16" 332155 CME0
In stock online.

$6.99

Add to My List
Anode with Plug, Length: 2" (51mm), Diameter: 1/4" (6mm), NPT: 1/8", UNC: 1/4" 519017 CME00
In stock online.

$6.99

Add to My List
Anode with Plug, Length: 2" (45mm), Diameter: 1/2" (13mm), NPT: 3/8", UNC: 3/8" 194274 CME1
In stock online.

$10.49

Add to My List
Anode with Plug, Length: 1 3/4" (45mm), Diameter: 1/2" (13mm), NPT: 3/8", UNC: 3/8" 6670848 CME1D
Delivery within 2 - 3 weeks.

$15.99

Add to My List
Anode with Plug, Length: 1 1/2" (38mm), Diameter: 1/2" (13mm), NPT: 3/8", UNC: 3/8" 6670855 CME1E
Delivery within 2 - 3 weeks.

$4.89

Add to My List
Anode with Plug, Length: 1 1/4" (32mm), Diameter: 1/2" (13mm), NPT: 3/8", UNC: 3/8" 6670863 CME1F
Delivery within 2 - 3 weeks.

$5.79

Add to My List
Anode with Plug, Length: 1" (25mm), Diameter: 1/2" (13mm), NPT: 3/8", UNC: 3/8" 6670871 CME1G
Delivery within 2 - 3 weeks.

$12.49

Add to My List
Anode with Plug, Length: 2" (51mm), Diameter: 3/8" (10mm), NPT: 3/8", UNC: 7/16" 593485 CME1H
In stock online.

$10.99

Add to My List
Anode with Plug, Length: 2" (51mm), Diameter: 5/8" (16mm), NPT: 1/2", UNC: 7/16" 194282 CME2
In stock online.

$10.99

Add to My List
Anode with Plug, Length: 2" (51mm), Diameter: 3/4" (19mm), NPT: 3/4", UNC: 1/2" 485318 CME3
In stock online.

$12.99

Add to My List
Anode with Plug, Length: 3 3/8" (86mm), Diameter: 3/4" (19mm), NPT: 3/4", UNC: 1/2" 485334 CME4
In stock online.

$12.99

Add to My List
Anode with Plug, Length: 5 5/8" (92mm), Diameter: 3/4" (19mm), NPT: 3/4", UNC: 1/2" 217838 CME5
In stock online.

$12.99

Add to My List
Anode Only, Length: 1 3/4" (45mm), Diameter: 3/8" (10mm), NPT: 1/4" 307314 CMEZ0
In stock online.

$2.99

Add to My List
Anode Only, Length: 2" (51mm), Diameter: 1/4" (6mm), NPT: 1/8" 524611 CMEZ00
In stock online.

$2.99

Add to My List
Anode Only, Length: 2" (45mm), Diameter: 1/2" (13mm), NPT: 3/8" 194290 CMEZ1
In stock online.

$3.99

Add to My List
Anode Only, Length: 1 3/4" (45mm), Diameter: 1/2" (13mm), NPT: 3/8" 6670889 CMEZ1D
Delivery within 2 - 3 weeks.

$1.89

Add to My List
Anode Only, Length: 1 1/2" (38mm), Diameter: 1/2" (13mm), NPT: 3/8" 6670897 CMEZ1E
Delivery within 2 - 3 weeks.

$1.89

Add to My List
Anode Only, Length: 1 1/4" (32mm), Diameter: 1/2" (13mm), NPT: 3/8" 6670905 CMEZ1F
Delivery within 2 - 3 weeks.

$1.79

Add to My List
Anode Only, Length: 1" (25mm), Diameter: 1/2" (13mm), NPT: 3/8" 6670913 CMEZ1G
Delivery within 2 - 3 weeks.

$5.99

Add to My List
Anode Only, Length: 2" (51mm), Diameter: 3/8" (10mm), NPT: 3/8" 4725826 CMEZ1H
Limited availability.

Orig. $3.99

Now  $0.66

Add to My List
Anode Only, Length: 2" (51mm), Diameter: 5/8" (16mm), NPT: 1/2" 194308 CMEZ2
In stock online.

$3.99

Add to My List
Anode Only, Length: 2" (51mm), Diameter: 3/4" (19mm), NPT: 3/4" 485326 CMEZ3
In stock online.

$3.99

Add to My List
Anode Only, Length: 3 3/8" (86mm), Diameter: 3/4" (19mm), NPT: 3/4" 485342 CMEZ4
In stock online.

$3.99

Add to My List
Anode Only, Length: 5 5/8" (92mm), Diameter: 3/4" (19mm), NPT: 3/4" 217820 CMEZ5
In stock online.

$4.59

Add to My List

Product Description

Protect your engine against galvanic corrosion by changing its anode regulary.

Anodes may be purchased as a complete assembly (anode with brass plug) or as a replacement anode only. Threads for replacement anodes (which screw into the plug) are “NPT.” Outside threads for plugs (which screw into the engine block) are “UNC”. “Length” refers to visible portion of anode when installed in plug. Offered in zinc alloy only.

Specs

REVIEW SNAPSHOT®

by PowerReviews
MartyrEngine Cooling System “Pencilx9D Anodes
 
4.8

(based on 11 reviews)

Ratings Distribution

  • 5 Stars

     

    (9)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Protects well (8)
  • Easy to use (7)

Cons

No Cons

Best Uses

  • Engine (10)
    • Reviewer Profile:
    • Advanced (8), Casual/ recreational (3)
    • Was this a gift?:
    • No (11)

Reviewed by 11 customers

Displaying reviews 1-10

Back to top

Previous | Next »

 
5.0

good product

By Tom

from Cranston, RI

About Me Casual/ Recreational

Verified Buyer

Pros

  • Protects Well

Cons

    Best Uses

    • Engine

    Comments about Engine Cooling System “Pencilx9D Anodes:

    It's the right size Zn for my Universal Diesel 25XP engine heat exchanger.

    • Was this a gift?:
    • No
     
    5.0

    Works as advertised

    By M & A Ent

    from So-Cal

    About Me Advanced

    Verified Buyer

    Pros

    • Protects Well

    Cons

    • Not Durable

    Best Uses

    • Engine

    Comments about Engine Cooling System “Pencilx9D Anodes:

    Trying to use a engine pencil Zink that screws into the old brass threaded base is a pipe dream & practically impossible as the mostly dissolved old Zink required drilling out to remove old one & it usually breaks off. So might as well get one that has the brass threaded base as part of it to begin with.

    • Was this a gift?:
    • No
     
    5.0

    Zinc replacement is easy and inexpensive

    By S/V Papillon

    from La Porte, Texas

    About Me Advanced

    Verified Buyer

    Pros

    • Easy to Use
    • Less expensive than a plug with a zinc
    • Protects Well

    Cons

      Best Uses

      • Engine
      • Heat Exchanger

      Comments about Engine Cooling System “Pencilx9D Anodes:

      When a plug with a zinc is expended I replace the zinc. The zinc is threaded into the plug and can be removed and a new one screwed in. Even if the old zinc is totally gone or breaks off, it can be drilled out and a tap of the appropriate size can be used to clean the threads. The new zinc can then be screwed into the plug.

      • Was this a gift?:
      • No
       
      5.0

      zinc

      By ragamuffin

      from cape cod ma

      About Me Advanced

      Verified Buyer

      Pros

      • Easy to Use
      • Protects Well

      Cons

        Best Uses

        • Engine

        Comments about Engine Cooling System “Pencilx9D Anodes:

        they work great

        • Was this a gift?:
        • No
         
        5.0

        Pleasantly surprised

        By Capt Joe

        from Savannah GA

        About Me Advanced

        Verified Buyer

        Pros

        • Easy to Use

        Cons

          Best Uses

          • Engine

          Comments about Engine Cooling System “Pencilx9D Anodes:

          Was pleasantly surprised to find the pencil anode needed for my heat exchanger on the shelf.
          Last year I paid over $2,000.00 to have my heat exchanger replaced due to the galvanic corrosion. For only a few dollars, it is now part of my routine maintenance.

          • Was this a gift?:
          • No
           
          5.0

          It's a Zinc

          By Steve

          from Baltimore Harbor MD

          About Me Casual/ Recreational

          Verified Buyer

          Pros

          • Easy to Use
          • Protects Well
          • selfless

          Cons

            Best Uses

            • Engine

            Comments about Engine Cooling System “Pencilx9D Anodes:

            It's a zinc and it works. What else could you ask for?

            • Was this a gift?:
            • No
             
            5.0

            Would buy again

            By Robby

            from Tampa Bay

            About Me Advanced

            Verified Buyer

            Pros

            • Easy to Use
            • Protects Well

            Cons

              Best Uses

              • Engine

              Comments about Engine Cooling System “Pencilx9D Anodes:

              Inexpensive way to protect your cooling system, change your anodes at least once a year.

              • Was this a gift?:
              • No
               
              5.0

              Fits my OMC heat exchanger.

              By Protobug

              from Oregon

              About Me Advanced

              Verified Buyer

              Pros

              • Easy to Use
              • Visually Pleasing

              Cons

              • None

              Best Uses

              • Engine
              • Fit my '77 OMC

              Comments about Engine Cooling System “Pencilx9D Anodes:

              Pipe thread 3/8, replaced a used up anode in the heat exchanger in my boat.

              • Was this a gift?:
              • No
               
              4.0

              Great customer service from Terry

              By Gene "Captain of Leisure"

              from Bremerton WA

              About Me Advanced

              Verified Buyer

              Comments about Engine Cooling System “Pencilx9D Anodes:

              Had a hard time finding the right size pencil zink for my engine. Terry to the time to look for it and discovered that the one I needed had been put in the wrong bin. This actually saved me a couple of bucks.

              • Was this a gift?:
              • No
               
              4.0

              Readily available in stock

              By Sailor Pal Al

              from Seattle, WA

              About Me Casual/ Recreational

              Verified Reviewer

              Pros

              • Protects Well

              Cons

                Best Uses

                • Engine

                Comments about Engine Cooling System “Pencilx9D Anodes:

                Nice to find this item readily available at my local West Marine Store.

                • Was this a gift?:
                • No

                Displaying reviews 1-10

                Back to top

                Previous | Next »