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Tech Library > Marine Cooling Systems > Thru-Hull Installation
Seawater Connections – General Information
This section covers through the hull and through the transom water inlets only. For information on sterndrive water inlet connections, refer to the appropriate section after engine installation.
IMPORTATANT: Seal the inside edges of any hold made through the hull with a suitable sealant to prevent water absorption and deterioration.
Seawater Pickup
THROUGH THE
HULL MOUNTED
1. Seal inside edges of 1-3/4 in. (44mm) hole in hull using a suitable sealer.
2. Apply marine caulking (sealer) to mounting surface on seawater pickup where hull contact will occur when installed.
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Description
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Where Used
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Part Number
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A Marine Caulking
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Mounting Surfaces
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Obtain Locally
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IMPORTANT: Seawater inlet slots must face forward – parallel with the flow of water.
3. Ensure slots in seawater pickup are facing forward (toward bow of boat) and install seawater pickup through hull.
4. Fasten pickup with four appropriate mounting screws (if so designed).
5. Apply marine caulking as needed inside boat. Apply sealant to threads of nut and install on pickup on inside of boat and torque nut.
a. – Seawater Pickup
b. – Seawater Inlet Slots
c. – Mounting Screw Holes (if Equipped)
d. – Seawater Inlet Nut
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Description
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Where Used
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Part Number
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A Marine Caulking
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Mounting Surfaces
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Obtain Locally
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B Loctite 271
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Seawater Inlet Nut
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92-809820
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Description
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Nm
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Ib-in.
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Ib-ft
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Nut
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42
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35
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NOTE: If pickup being installed does not have mounting screws on underside where mounted to hull, be certain, after nut is torqued, that slots are still facing forward.
