Update: There is one Typo on QSB the 6.7 Zincs should read 4qty 1/2" & 1 3/8" Zinc.
In this video Justin covers the sizing and installation of pencil Zincs. Basically this is everything you need to know to about Zincs for your inboard marine engine. Enjoy, and feel free to ask questions in the comments. To see what Zincs you need skip ahead to 4:30. We left off the 6BTA 250HP and 270HP JWAC, which, in the factory configuration only requires one 1/2" Zinc for the Heat Exchanger. Also the "wet" M11 requires 3 1/2" Zincs.
