A typical battery has a positive terminal “Anode” and a negative terminal “Cathode” the electrons flow from the anode to the cathode. A marine vessel is basically a giant battery, the saltwater is the electrolyte and the dissimilar metal components below the waterline are the cathodes and anodes. The most reactive metal becomes the anode and it is eroded most quickly. CTP anodes are made out of Zinc to make sure metal components are protected from erosion, by reacting faster than the metal it is protecting, being consumed slowly before the other metal reacts with the electrolyte.


Part No. Description Engine Model Diameter Lenght Thread
1167009 ROD ZINC 3508B, 3512B, 3516B/C 1/4″ – 20
6L2016 ROD ZINC 3208 3/4″ 3/4″ 3/4″ NPT
6L2280 ROD ZINC 3126B, 3176B/C, 3196, 3304/B, 3306/B, 3406B/C, 3408/B, 3408C, 3412/C, 3412D/E, 3508/B/C, 3512/B/C, 3516/B/C, C7, C9, C12, C18, C32 1/2″ 1-1/2″ 3/8″-16
6L2284 ROD ZINC 3408B/C, 3412C/D/E, 3508/B, 3512/B, 3516/B/C 1-1/4″  2-1/4″ 3/4″-10
6L2288 ROD 3126B, 3208, 3606, 3608, 3612, 3616, C7 5/8″ 2-1/2″ 3/8″-16
6L3104 ROD 3116, 3126, 3406E 3/8″ 1-1/2″ 1/4″-20


Part No. Description Engine Model Diameter Lenght Thread
1149096 PLUG-O-RING 3126 5/8″ 1/2″ – 20 1/4″ – 20
3610785 PLUG-STOR 3406E, 3512B, C15, C18, C32 7/8″ 3/4″ – 16 3/8″ – 16
5B9651 PLUG-ZINC 3406E, C7, C9, C15, C18, C30, C32 5/8″ 2″ 3/8″- 16

* Other part no. not included in the list are available. Please contact your sales representative if you have any questions.
Part Numbers are used for reference purposes only.