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5. Apply a 1/8" thick layer of sealant around the lip of the plastic or
bronze housing. A thin layer should also be applied up the
sidewalls to a height of 1/4" greater than the hull thickness. This
will ensure there is sealant material in the threads to seal them,
and hold the housing nut securely in place.
6. From the outside of the hull, push the housing (with sealant
applied) into the drilled hole. Apply a twisting motion to the housing
to squeeze out excess sealant.
7. Put the nut on the transducer from the inside of the hull. If nylon,
hand tighten only.
8. Clean off any excess sealant from around the transducer.
STEM-TYPE (POWER BOAT BRONZE) TRANSDUCERS
The stem-type transducer is popular as a replacement transducer since it
was the primary style used on older boats. The stem will fit the same
size hole as a previously defective or obsolete transducer. Also, if your
hull has a steep dead rise, the stem-type transducer will be best suited
for your application. However, because of the smaller diameter shaft
going through the hull, a fairing block should be used so that the
transducer can be oriented straight up and down. Fairing blocks are best
made out of hard wood such as oak. The shape of the block will be
determined by the shape of your hull and the style of transducer you
choose.
10
GASKET
(OR RUBBER)
HULL
SEALANT