Cabo shaft zincs

Stick with just the transom zinc, if it's bonded correctly with the shaft brush, it won't be any different or better protecton if there's a zinc on the shaft itself. Otherwise you may notice issues with prop burn from the cavitation of the zinc in front of the prop. Some Cabo's experienced prop burn and others didn't.

Struts are tied into the transom zinc, they have a wire connected to them on the inside of the boat. Cabo's NEVER have galvanic issues, so there is no need to play engineer and add zincs. Cabo's do have tunnels and a tight blade tip to tunnel clearance and can have issues with cavitation burn on some models and some propellers. Adding shaft zincs disturbes the water flow through the tunnel an exasperates this issue. Considering they haven't built a 40' in at least 10 years, if that boat hasn't had an issue yet, what makes one think there is a reason to do anything differently? Shall we screw copper sheets on top of the entire bottom too, just in case the bottom paint isn't effective enough? You know, because that's what ship builders did decades ago.

Don't put shaft zincs on. Stick with the brushes and the transom zinc and you'll be fine. The 40's like clean water going to those props thats why we never installed shaft zincs at the factory.

There has been NO need for a Cabo to have shaft zincs. Ever. Please present one Cabo that has had a galvanic issue. You're creating a fix for a problem that has never existed.

yes, it had shaft brushes

Because your question is re-wording the same question and asking it twice and expecting a different response. Insanity, if you will. IF the boat doesn't have any electrolysis issues at all with shaft brushes and a transom zinc, nor have any Cabo's (unless there was something really wrong, poorly re-wired etc.). HOW would shaft zincs be beneficial in any way, shape, or form. Only negatives........

However, if you want to see what wiring on a yacht should look like. Look on the internet for pictures of Cabo wiring.

I don't profess to know more than the engineers that designed and built Cabo's and determined that a single shaft zinc was the way to go!!!! Being that I've been an approved vendor for Cabo since 2004, and worked for a sub-contractor of there's prior to that. I think that I know why they did what they did. The son of one of the founders told you the exact same thing I did. You've chased away everyone that knows what they're talking about by constantly questioning what they have to say! But neither of us' answers are sufficient for you.

One other engineer was pretty smitten on thinking overzincing eventually cause prop shafts to snap on fast boats, since the over zincing pulled a metal out of the S/S alloy over time causing the shafts to become brittle

Getting rid of a honking shaft zinc that's both disturbing waterflow to the propellers, creating drag and robbing the cutlass bearings of cooling water when the shaft zinc inevitably slides down the shaft on a 30+ knot sportfish, was/is moving forward in hydrodynamic design from what builders did in the 80's and 90's. Some builders have gone as far as to put shaft tubes on the shafts, because just the shafts spinning in the water column also creates drag, which did pick up a solid 1-1.5 knots but then determined the maintenance wasn't worth it, others are still doing it.

Transom zinc. typo.