zinc anode for heat exchanger

[kingofcary]

Hi All ... I have a Catalina 350 with M-35B Universal. My question is the size of the zinc anode in the heat exchanger. Parts manual shows it in exploded view but doesn't seem to indicate the size. I want to buy one ahead of time (in case needed) before changing fluid. They are 'relatively' inexpensive but I see a number of different sizes online to buy. Any help/advice appreciated ... thanks ... Dennis

[DougR]

Buy one from your local Universal dealer, or Catalina, and measure it, then you'll know exactly.

The zinc is sitting in seawater, so you can change it at any time. Don't have to wait for any other fluid change.....