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2.3.2 Installing the through hull fittings
1.
Use a 43 mm (1 11/16") hole cutter to cut through the hull. (See section 3 for correct
location).
2.
Apply the polyurethane sealing compound on the outer flange of the through-hull fitting and
tighten the nut on the inside by hand.
3.
Slide both rubber O-rings on the dummy plug.
4.
Generously apply the silicone grease to the exterior of the dummy plug.
5.
Install the dummy plug in the through-hull fitting. Use a slow twisting motion and be sure that
is properly seated into the fitting.
6.
With the dummy plug properly installed in the through –hull fitting, mount the fitting so that the
handle is exactly at right angles (90º) to the boats centreline. (For pronounced V-hulls see
section 3).
7.
When this outer sealant has cured, remove the nut and apply sealant on the inside. Tighten
the nut again by hand.
8.
Install the wire locking device onto the dummy plug /paddlewheel transducer.
12
Sea Data Set TH43
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