{"demoData":true,"provenance":"boat-day-survey-failures-v1","overlayCoverage":199,"methodology":"/content/datasets/survey-failures/methodology.md","agentGraph":"/api/v1/datasets/survey-failures?view=graph","data":{"findingsByBoatType":{"version":"1.0","updated":"2026-09-07","demoData":true,"provenance":"boat-day-survey-failures-v1","description":"Common pre-purchase / haul survey findings ranked by frequency and severity per boatType. Educational — not a survey report.","byBoatType":{"aluminum-utility":[{"finding":"Transom corrosion / rivet weep at motor mount","frequency":"high","severity":"high"},{"finding":"Trailer bunk misalignment scoring hull","frequency":"high","severity":"medium"},{"finding":"Fuel tank / sending unit corrosion","frequency":"medium","severity":"high"},{"finding":"Tiller / remote steering play","frequency":"medium","severity":"medium"},{"finding":"Missing or expired flares / PFDs","frequency":"medium","severity":"medium"}],"bass-boat":[{"finding":"Livewell pump / plumbing leaks into stringers","frequency":"high","severity":"medium"},{"finding":"Carpet moisture and deck soft spots","frequency":"high","severity":"high"},{"finding":"Trolling motor wiring / battery tray corrosion","frequency":"high","severity":"medium"},{"finding":"Jack plate / hydraulic issues","frequency":"medium","severity":"medium"},{"finding":"Outboard powerhead compression variance","frequency":"medium","severity":"high"}],"bay-boat":[{"finding":"Hull blistering / gelcoat stress at chine","frequency":"medium","severity":"medium"},{"finding":"Jack plate and shallow-water gear wear","frequency":"high","severity":"medium"},{"finding":"Electronics network / transducer failures","frequency":"medium","severity":"low"},{"finding":"Livewell / baitwell odor indicating stagnant water in core","frequency":"medium","severity":"high"},{"finding":"Trailer brakes neglected (salt)","frequency":"high","severity":"high"}],"bowrider":[{"finding":"Sterndrive bellows / gimbal bearing neglect","frequency":"high","severity":"critical"},{"finding":"Bow upholstery waterlogging","frequency":"high","severity":"medium"},{"finding":"Carpet mildew and stringer fastener corrosion","frequency":"high","severity":"high"},{"finding":"Manifold / riser corrosion (salt I/O)","frequency":"medium","severity":"critical"},{"finding":"Trailer bunk impressions on hull","frequency":"medium","severity":"medium"}],"cabin-cruiser":[{"finding":"Soft decks / cabin sole moisture","frequency":"high","severity":"high"},{"finding":"AC / generator neglect and carbon monoxide risk","frequency":"medium","severity":"critical"},{"finding":"Thru-hull / seacock seized or non-marine hose","frequency":"medium","severity":"critical"},{"finding":"Fuel tank age and venting issues","frequency":"medium","severity":"high"},{"finding":"Canvas / isinglass UV failure hiding window leaks","frequency":"high","severity":"medium"}],"catamaran":[{"finding":"Bridge-deck slamming damage / delamination","frequency":"medium","severity":"high"},{"finding":"Rudders / daggerboards play and bearing wear","frequency":"medium","severity":"high"},{"finding":"Standing rigging age (sail cats)","frequency":"medium","severity":"critical"},{"finding":"Through-hull density under bridgedeck","frequency":"medium","severity":"high"},{"finding":"Engine alignment / shaft seal issues (power 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depletion","frequency":"high","severity":"medium"}],"houseboat":[{"finding":"Pontoon / barge weld cracks and corrosion","frequency":"high","severity":"critical"},{"finding":"Roof / upper deck soft spots","frequency":"high","severity":"high"},{"finding":"Shore-power wiring and GFCI failures","frequency":"high","severity":"critical"},{"finding":"Holding tank / plumbing failures","frequency":"high","severity":"medium"},{"finding":"Generator and HVAC neglect","frequency":"medium","severity":"high"}],"jet-boat":[{"finding":"Impeller / wear-ring clearance out of spec","frequency":"high","severity":"high"},{"finding":"Intake grate debris damage","frequency":"high","severity":"medium"},{"finding":"Closed cooling / heat exchanger neglect","frequency":"medium","severity":"high"},{"finding":"Battery / electrical in wet bilge","frequency":"medium","severity":"medium"},{"finding":"Trailer bunks not matching jet hull 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decks","frequency":"medium","severity":"high"}],"pwc":[{"finding":"Impeller damage / wear ring","frequency":"high","severity":"high"},{"finding":"Battery and electrical corrosion","frequency":"high","severity":"medium"},{"finding":"Hull gelcoat / sponson damage from beachings","frequency":"high","severity":"medium"},{"finding":"Intake grate clogging history (overheat)","frequency":"medium","severity":"high"},{"finding":"Safety lanyard / kill switch defects","frequency":"medium","severity":"critical"}],"rib":[{"finding":"Tube fabric UV / seam failures","frequency":"high","severity":"high"},{"finding":"Valve leaks and chamber imbalance","frequency":"high","severity":"medium"},{"finding":"Transom insert soft / motor mount play","frequency":"medium","severity":"critical"},{"finding":"Console wiring in wet environments","frequency":"medium","severity":"medium"},{"finding":"Trailer support not matching RIB hull","frequency":"medium","severity":"medium"}],"sailboat":[{"finding":"Standing rigging age beyond recommended interval","frequency":"high","severity":"critical"},{"finding":"Chainplate leaks / bulkhead soft","frequency":"high","severity":"critical"},{"finding":"Keel bolt / stub moisture","frequency":"medium","severity":"critical"},{"finding":"Osmosis / blistering below waterline","frequency":"medium","severity":"high"},{"finding":"Thru-hull / seacock seized","frequency":"medium","severity":"critical"}],"trawler":[{"finding":"Diesel fuel system contamination","frequency":"high","severity":"high"},{"finding":"Shaft / packing / cutless bearing wear","frequency":"high","severity":"high"},{"finding":"Cabin leaks at ports and mast partners","frequency":"medium","severity":"high"},{"finding":"Stabilizer / paravane hardware fatigue (if fitted)","frequency":"low","severity":"high"},{"finding":"Bonding / zinc neglect in marina power","frequency":"high","severity":"medium"}],"wake-surf":[{"finding":"Ballast bag / pump leaks into bilge and stringers","frequency":"high","severity":"high"},{"finding":"Tower weld cracks / fastener pull-through","frequency":"medium","severity":"high"},{"finding":"V-drive / transmission service overdue","frequency":"medium","severity":"critical"},{"finding":"Soft deck near tower bases","frequency":"medium","severity":"high"},{"finding":"Stereo / electrical high-load wiring heat damage","frequency":"medium","severity":"medium"}]}},"findingsBySystem":{"version":"1.0","updated":"2026-09-07","demoData":true,"provenance":"boat-day-survey-failures-v1","description":"Survey findings organized by system. negotiate=true means often priceable; false often walk-away until fixed.","bySystem":{"engines":[{"finding":"Compression variance between cylinders","severity":"high","negotiate":true},{"finding":"Cooling system impeller / thermostat neglect","severity":"high","negotiate":true},{"finding":"Oil analysis metals elevated","severity":"critical","negotiate":true},{"finding":"Outboard lower-unit water in gearcase","severity":"high","negotiate":true}],"electrical":[{"finding":"Non-marine wire / open splices in bilge","severity":"critical","negotiate":false},{"finding":"Battery trays corroded; loose grounds","severity":"medium","negotiate":true},{"finding":"No working bilge pump / float switch stuck","severity":"critical","negotiate":false},{"finding":"Shore-power reverse polarity / failed GFCI","severity":"critical","negotiate":false}],"deck-core":[{"finding":"Soft deck underfoot / percussion dull","severity":"high","negotiate":true},{"finding":"Moisture meter elevated at hardware penetrations","severity":"high","negotiate":true},{"finding":"Delamination at stringer tabbing","severity":"critical","negotiate":false}],"fuel":[{"finding":"Fuel tank age unknown / weeping straps","severity":"high","negotiate":true},{"finding":"Ethanol phase separation history","severity":"medium","negotiate":true},{"finding":"Vent / charcoal canister blocked","severity":"medium","negotiate":true}],"safety-gear":[{"finding":"Expired flares / missing throwable","severity":"medium","negotiate":true},{"finding":"Insufficient PFDs for capacity","severity":"high","negotiate":false},{"finding":"Fire extinguisher discharged or missing","severity":"high","negotiate":false}],"trailers":[{"finding":"Brake actuator / surge brakes nonfunctional","severity":"high","negotiate":true},{"finding":"Bunks misaligned scoring hull","severity":"medium","negotiate":true},{"finding":"Frame rust through near axles","severity":"critical","negotiate":true}],"sail-rigs":[{"finding":"Standing rigging beyond ~10–15yr typical interval","severity":"critical","negotiate":true},{"finding":"Chainplate crevice corrosion","severity":"critical","negotiate":false},{"finding":"Spreaders cracked / tape failed","severity":"high","negotiate":true}],"sterndrives":[{"finding":"Bellows cracked / water in drive","severity":"critical","negotiate":false},{"finding":"Gimbal bearing 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confirmed."},{"id":"pv-flood","title":"Seller vague on storm / flood history","why":"Demand survey + oil analysis + moisture mapping."},{"id":"pv-hours","title":"Hours meter replaced without log","why":"Cross-check service records and compression."}]},"modelOverlays":{"version":"1.0","updated":"2026-09-07","demoData":true,"provenance":"boat-day-survey-overlays-v1","description":"Additive overlays by modelId — do not rewrite full model JSON. Merge extraCommonIssues / surveyFocus / campaign notes at read time.","count":199,"overlays":[{"modelId":"alumacraft-competitor-205","boatType":"aluminum-utility","brand":"Alumacraft","extraCommonIssues":["Transom plate corrosion under outboard","Trailer bunk scoring aluminum skin"],"surveyFocus":["Transom thickness / doubler","Fuel tank condition","Rivets and weld weeps"],"knownCampaignsOrTSBs":["Educational: Aluminum utility — transom and trailer bunks.","Educational: check OEM service bulletins for tiller/steering updates on your year — no fabricated recall numbers."],"severityTags":["corrosion","trailer","fuel"],"demoData":true,"provenance":"boat-day-survey-overlays-v1","lastReviewed":"2026-09-07"},{"modelId":"alumacraft-voyageur-175","boatType":"aluminum-utility","brand":"Alumacraft","extraCommonIssues":["Transom plate corrosion under outboard","Trailer bunk scoring aluminum skin"],"surveyFocus":["Transom thickness / doubler","Fuel tank condition","Rivets and weld 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HP."],"severityTags":["deck-core","electrical","engines"],"demoData":true,"provenance":"boat-day-survey-overlays-v1","lastReviewed":"2026-09-07"},{"modelId":"bayliner-element-e18","boatType":"bowrider","brand":"Bayliner","extraCommonIssues":["Sterndrive bellows neglect","Bow foam waterlogging","Carpet mildew"],"surveyFocus":["Bellows/gimbal","Manifolds/risers if salt","Interior moisture"],"knownCampaignsOrTSBs":["Educational: Value runabout — bellows, moisture, trailer.","Educational: I/O bellows are a classic pre-purchase deal-breaker if ignored — verify service records."],"severityTags":["sterndrive","moisture","critical-service"],"demoData":true,"provenance":"boat-day-survey-overlays-v1","lastReviewed":"2026-09-07"},{"modelId":"bayliner-element-e26","boatType":"deck-boat","brand":"Bayliner","extraCommonIssues":["Soft deck at furniture mounts","Overcapacity wear cues","Upholstery saturation"],"surveyFocus":["Deck percussion","Propulsion cooling","Capacity plate vs 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verify any foam-related service history without inventing recall numbers.","Educational: salt CC buyers should budget anodes, lower-unit service, and trailer brakes annually."],"severityTags":["deck-core","salt","electrical"],"demoData":true,"provenance":"boat-day-survey-overlays-v1","lastReviewed":"2026-09-07"},{"modelId":"boston-whaler-270-dauntless","boatType":"dual-console","brand":"Boston Whaler","extraCommonIssues":["Walkthrough windshield leaks","Head odor/tank","I/O bellows on sterndrive models"],"surveyFocus":["Console cores","Sterndrive if equipped","Fuel sending unit"],"knownCampaignsOrTSBs":["Educational: Unibond reputation is strong — still moisture-map decks and check console penetrations; verify any foam-related service history without inventing recall numbers.","Educational: dual consoles hide moisture at the walkthrough — meter both sides."],"severityTags":["moisture","sterndrive"],"demoData":true,"provenance":"boat-day-survey-overlays-v1","lastReviewed":"2026-09-07"},{"modelId":"boston-whaler-280-outrage","boatType":"center-console","brand":"Boston Whaler","extraCommonIssues":["Console core soft","T-top fastener corrosion","Battery wiring in wet bilge"],"surveyFocus":["Console/windshield leaks","Outboard gearcases","Bonding/anodes"],"knownCampaignsOrTSBs":["Educational: Unibond reputation is strong — still moisture-map decks and check console penetrations; verify any foam-related service history without inventing recall numbers.","Educational: salt CC buyers should budget anodes, lower-unit service, and trailer brakes annually."],"severityTags":["deck-core","salt","electrical"],"demoData":true,"provenance":"boat-day-survey-overlays-v1","lastReviewed":"2026-09-07"},{"modelId":"boston-whaler-315-conquest","boatType":"cabin-cruiser","brand":"Boston Whaler","extraCommonIssues":["Cabin leaks at ports","Generator 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