How can I stop water leaking through the outer bolts of the aft starboard cleat on my Hallberg-Rassy 312?
Water is coming in through the two outer bolts of the aft starboard cleat on my Hallberg-Rassy 312. I have resealed around the cleat, but it still leaks. Do I need to remove it, and how do I reach the outer fixings?
Answer
A lasting repair usually means removing the aft starboard cleat and renewing the bedding beneath its base and around all four bolt holes; another bead around the outside rarely stops water already travelling underneath. First establish how the two outer bolts are secured, because seeing only two nuts below does not prove that the other bolts screw into the laminate.
Trace the leak and fixings
Transfer the mooring line to another sound strongpoint before loosening anything. Leave the suspect cleat unloaded until the repair has cured.
Dry the underside thoroughly, then ask someone to run a gentle stream of water around the cleat while you watch below with a torch. Test the surrounding teak seams and nearby fittings separately. Water can track along the underside of the deck and emerge at a bolt some distance from its entry point. A pressure washer makes the source harder to trace.
On older Hallberg-Rassys, access can mean removing an aft-cabin lining panel or locker trim. Start inside the starboard aft locker and adjacent cabin lining. Use a mirror or inspection camera before dismantling joinery. Photograph each fixing and look for washers, backing plates, rust staining and damp timber.
Owners of similar Hallberg-Rassy four-hole cleats have reported finding only two visible nuts. There are also reports of outer fasteners threaded directly into fibreglass on stanchion fittings, but these do not confirm how your cleat is fitted. Production details and previous repairs can differ. Establish what is there before applying force.
Remove and inspect the cleat
If all four fasteners have nuts, ask a helper to hold the bolt heads while you undo the nuts below. If an outer screw turns without coming out, stop and investigate. There may be a concealed nut or damaged thread. Do not assume the screw needs pulling out with a lever.
- Mark the cleat's orientation and keep each fastener with its washer and nut.
- Cut the old sealant around the base, then work a thin scraper underneath without gouging the teak or gelcoat.
- Lift the fitting and remove old bedding from the base, bolt shanks and seating surface.
- Inspect every hole and the material immediately around it before preparing to reseal.
Check for corrosion beneath an aluminium base, cracks around the outer holes, enlarged holes, compressed teak and loose backing arrangements. A distorted base can rock under mooring loads and repeatedly break the seal. Sealant cannot repair that movement.