Balsa wood core areas of 1977 Santa Cruz 2566

[palfvin]

I'm looking to install Hull Shield on our boat to discourage marine growth. It only works, however, if the associated transducers are mounted directly against the hull below the waterline with no intervening insulation or sound absorbing material.

If necessary, I can mount them on the outside of the transom, but I'd prefer to mount them on the inside of the hull if possible.

The owner's manual says that balsa wood was added to the hull on the "planing surface" and to the hull sides "where necessary". I'm wondering if anyone knows what this translated to and, specifically, where I might find a couple of spots roughly three inches in diameter which meet the above criteria.

I will do my best to determine if such spots exist through inspection, but I'm hoping someone in this group might already know the answer.

[km1125]

Not familiar with the Hull Shield device, but if it's using ultrasound (or any high frequency audio) to deter growth then I'd think it would be a problem to shoot through a cored hull. Not sure if yours is a cored hull but if it is then most of what's below the waterline would probably be cored. You might want to check with the manufacturer of the Hull Shield regarding the cored hull installations.

[plittle2005]

I owned one of these boats. I saw these hulls being laid up at the Carver plant. The entire bottom up to the waterline was balsa-cored. The transom was glassed-over plywood.