What are the common problems to check when buying a used Hallberg-Rassy 46?

The biggest expense on a used Hallberg-Rassy 46 is replacing an original teak deck, followed closely by overhauling the Seldén hydraulic or electric furling systems. Beyond that, you need to inspect the stainless steel tanks for weld corrosion and check the Aquadrive thrust bearing mounts for perishing rubber.

Teak Deck and Core

Hallberg-Rassy 46s built between 1995 and 2005 originally came with a substantial 12mm teak deck. On a 1999 hull, this teak was both glued and screwed into the GRP sub-deck. Over two decades of washing and weathering, the teak wears down. This exposes the wooden bungs and eventually the stainless steel screw heads.

Look closely at high-traffic areas like the side decks and cockpit sole. If the black caulking stands proud of the wood or you see dozens of exposed screw heads, the deck is finished. A professional replacement involves stripping the old teak, filling the screw holes and vacuum bagging a new glued-down deck. This costs between £25,000 and £35,000. If water has travelled down the screw threads, the Divinycell foam core underneath may be wet. You will need localised GRP repairs before the new teak goes down.

Stainless Steel Tanks

The HR 46 carries massive volumes of water (920 litres) and fuel (660 litres) in custom stainless steel tanks. These sit deep in the bilge under the saloon floor. While the hulls are dry, condensation and bilge water cause crevice corrosion on the bottom tank welds.

Lift the floorboards. Inspect the lower tank seams with a torch and mirror. Look for weeping diesel or white crusty water stains. The stainless steel holding tanks under the forward and aft heads are particularly vulnerable at the top welds due to uric acid. If a holding tank fails, extracting it requires dismantling high-quality mahogany joinery. This turns a £600 tank replacement into a £2,500 labour bill.

Engine Room and Drive Train

The walk-in engine room houses a 100hp Volvo Penta TAMD31S or a replacement Yanmar 4JH series. Before entering to inspect running belts, ensure the battery isolators are off. Check the exhaust injection elbow for rust and carbon build-up. Ensure the silver soundproofing foam on the bulkheads is not degrading into sticky black dust.

The HR 46 uses a shaft drive coupled via an Aquadrive constant velocity (CV) joint. This isolates engine vibration from the hull. Check the heavy rubber thrust bearing mounts where the Aquadrive meets the hull bulkhead. After 20 years, this rubber perishes and sags. If the mounts fail, the shaft alignment shifts. This causes severe vibration and rapid wear to the cutlass bearing and stern gland.