Zinc Cavitation horseshoe on 400 stringer..

[minnow44]

I'm missing the Zinc horseshoe after traveling a washboard road. Is there any harm in running without it in fresh water.. I see abundant exhaust bubbles boiling up in front of the outdrive. The horseshoe normally partially plugs the exhaust vent at this location. ???

 

[alldodge]

None of the zinc, aluminum or magnesium sacrificial anodes are need for a boat which spends it's life on a trailer. So long as it is not plugged into shore power they don't even need to be there

 

[Scott Danforth]

if you want to replace it, I have run across them for under $20 online. the whole kit (all 3 zincs) is under $35