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While in the boatyard we replaced all of the thru-hulls and sealed them using Sika 291, a renowned sealant. From the thru-hull mushrooms to the keel cooler and the transducer, we documented the steps involved in these installations and the importance of using the right products for a successful outcome.
The “mushroom” part of the thru-hull is basically the threaded ring that attaches to the outside of the hull. Before installing the thru-hull mushrooms, we prepared the hull by cleaning the areas that would be in contact with the sealant.
To secure the thru-hull mushrooms, we employed a seacock tool, carefully screwing them to the exterior of the hull. Once in place, we aimed to provide long-lasting protection by applying a coat of bottom paint. The combination of the bronze mushrooms and the specialized paint helps to prevent fouling and maintain optimal performance.
Next on our agenda was the installation of a keel cooler, a vital component for our Frigoboat refrigeration system. The keel cooler acts as a heat sink, dissipating excess heat and maintaining the efficiency of the system. With the hull prepared, we turned to Sika 291 to provide a robust and watertight seal between the cooler and the hull.
Sika 291, a trusted marine-grade sealant, offers excellent adhesion and durability, making it ideal for below-the-waterline applications. Applying the sealant meticulously, we ensured a tight seal, preventing any water ingress that could compromise the system’s functionality.
Completing the installation of components below the waterline, we reached the final stage: installing the transducer. This device plays a crucial role in providing accurate depth, speed, and water temperature information. Similar to previous installations, we relied on Sika 291 to seal the transducer in place.
By using Sika 291 to create a watertight seal, we ensured that no water would enter the hull through the transducer mounting point. Additionally, we took the extra step of applying a water-based anti-fouling paint to the transducer. This coating helps to prevent marine growth, ensuring clear and precise readings.
As our time in the boatyard was drawing to a close we had a couple of vitally important tasks to complete. Namely, installing the new bobstay fitting and the new bobstay wire.
We also replaced the name and hailing port decals since the old ones were starting to peel, reinstalled the prop shaft and propeller.
After nearly three weeks of diligent work in the boatyard, we successfully completed the installations of various components below the waterline. From the thru-hull mushrooms and keel cooler to the transducer, each installation required meticulous attention to detail and the use of a reliable sealant like Sika 291.
Boatyard projects, while demanding, are rewarding endeavors that contribute to the overall safety and functionality of our boat. We dedicated a lot of time time and effort to researching the best products to use and proper installations. It all lends to the peace of mind that we have a sound boat that will take us far.