practicalboatowner · video

What this video covers

A marine surveyor — a full member of the YDSA and SCNS with 40 years in British Marine — presents a catalogue of defects and failures found during pre-purchase and damage surveys of GRP, steel, aluminium, and wooden yachts in the UK.1:10 The surveyor opens by noting that UK marine surveyors require no formal qualifications, making membership in a professional body the only reliable credential check for buyers.1:00

Specific defects covered include: osmosis blisters up to 5.5 inches in diameter with delamination halfway through a six-laminate hull; balsa-core deck rot under teak, with replacement costs of £30,000 for teak alone; a galvanised shackle used as a permanent rigging pin that caused a rig loss at sea; bow rollers on production boats with no stem strap, creating a developing hull fracture; engine mounts with failed vulcanisation that were caught before a sea trial; cast-iron exhaust manifolds fracturing around ten years old; fuel lines resting on gearbox sharp edges; gear-shift connections without lock nuts (one narrowboat incident caused £32,000 in lock-gate damage); diesel bug in two-year-old fuel from bio-diesel contamination; a below-waterline cooling hose secured with a single Jubilee clip that sank the boat; and a bilge pump hose disconnected from its discharge fitting.22:48 Sail drive seal replacement intervals and thermal imaging for moisture detection are also discussed.43:25 The surveyor recommends tapping decks with water poured on them to locate wet balsa core, using a pry bar to test engine mount stiffness, and never buying a freshly painted wooden boat without investigating why.12:59

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