- Action: To Do List item A0088 – Remove forward speed transducer thru hull and close out hole.
- Action: To Do List item A0089 – Remove aft speed transducer thru hull and close out hole.
- Action: To Do List item A0090 – Remove and delete depth transducer.
- Action: To Do List item A0091 – Install a Raymarine/Airmar retractable DST800 Smart Triducer Multisensor.
- Completed: 16 April 2017
- Cost: $355.99
The forward and aft speed transducer thru hulls were removed using a chisel to cut the plastic material they were made of. The white plastic material of the forward transducer thru hull literally shattered like glass when struck by the chisel and hammer - definitely not marine rated or approved material. Both forward and aft speed transducer thru hulls came out relatively easy using the chisel and hammer.
Removed the internal plastic nut from the depth transducer sensor, cut the wire, and used a hammer to easily knock it out of the hull.
The forward and aft speed transducer thru hull holes were flared out and sanded, a flat piece of fiberglass cloth laid in on the interior side, then multiple layers of increasing size fiberglass cloth were epoxied on the exterior to close out the holes. Finished the inside and outside surfaces with epoxy thicken with colloidal silica to ease the surface sanding. The outside surface was sanded smooth to the same contour of the hull. Miscellaneous material, epoxy, fiberglass cloth and sanding paper cost approximately $30.00.
Ordered and received a retractable, Raymarine/Airmar DST800 Thru-Hull Smart Triducer that provides depth, speed, and temperature in a single thru-hull fitting - cost $300.99. This decision to use this sensor also resulted in the decision to upgrade the entire navigational electronic system.
The existing depth sensor hole and surrounding area was sanded and then painted with two coats of Interlux InterProtect HS Epoxy Primer (YPA422 / YPA420) applied to the exterior and interior surfaces and allowed to cure dry. The new sensor thru hull housing was reinstalled again, dry-fitted, to verify fit and alignment, before final installation with the application of 3M 4200 Marine Adhesive sealant. Miscellaneous material cost for this installation was approximately $25.00.
