Marine Fouling Paint
It is the obligation of trained marine mechanics to make yard crews aware of this
important bit of information. Proper application of anti-fouling paints can save the
customer money and give us less aggravation when it's time to tear down a lower unit for
repair.
Fouling is a build-up (usually animal-vegetable-derived) occurring on the boat's bottom
and drive unit. Fouling creates drag, which reduces boat performance. In fresh water,
fouling results from dirt, vegetable matter, algae or slime, chemicals, minerals and other
pollutants. In salt water, barnacles, moss and other marine growth often produce dramatic
build-up of material quickly. It is important to keep the hull as clean as possible to
maximize boat performance.
Anti-fouling paint, if required, may be applied to boat hull observing the following
precautions.
WARNING: DO NOT paint zinc or aluminum anodes or any
Electronic Galvanic Corrosion System reference electrode and anode, as this will render
them ineffective as galvanic corrosion inhibitors. Avoid corrosion damage. Do not apply
anti-fouling paint to the sterndrive unit or transom assembly.
IMPORTANT: If anti-fouling protection is required,
Tri-Butyl-Tin-Adi pate (TBTA) base anti-fouling paints are recommended on sterndrive
boating applications. In areas where Tri-Butyl-Tin-Adipate base paints are prohibited by
law, copper base paints can be used on boat hull (other than aluminum hulls) and boat
transom. Corrosion damage that results from the improper application of anti-fouling paint
are not covered by warranties.
Avoid an electrical interconnection between the sterndrive, Anodic Blocks, or any
Electronic Galvanic Corrosion System and the paint by allowing a minimum of 1 in. (26mm)
UNPAINTED area on transom of the boat around these items.

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