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Model profile · for Great Loop buyers

Grand Banks 46 Classic

The published record on this model and what owners report, with the questions worth asking while a boat is still a listing. This page covers the model. Every boat still needs its own homework.

Semi-displacement teak trawler with a Loop-friendly folding mast; the recurring buyer risk is 3208TA engine wear and aftercooler failure, sensitive to how a prior owner ran it.

The Grand Banks 46 Classic is a semi-displacement teak-built cruising trawler most commonly powered by twin Caterpillar 3208 diesels, frequently the 375 hp turbo-aftercooled (3208TA) version. It is well suited to the Great Loop thanks to a folding electronics mast that lowers air draft substantially, though added flybridge enclosures, hardtops, and antennas can defeat that advantage. The dominant engine concern is 3208TA wear and aftercooler failure, both strongly tied to how hard a previous owner pushed the boat. Engine access in the compartment is tight, which raises service cost and difficulty.

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How to read the tags on this page. CLAIMstated by one source, not yet confirmed CONTEXTbackground on how this model is built or used Sources are linked where published.

Systems

CLAIM
Check the oil pans for salt-water rust Owners advise checking the oil pans for rot: if the raw-water pump has been leaking, salt collects on the pan and it can rust through quickly. This is a hull/installation condition item worth a direct look. src: Trawler Forum
Your move: Have the surveyor inspect both oil pans for rust and check the raw-water pumps for past leakage.

Access

CONTEXT
Engine compartment is tight, especially around the TA hardware Owners describe the engine compartment as crowded and difficult to work in with 3208TA Cats, which are bulky with all the turbo/aftercooler hardware. The aftercooler is reported as a pain to remove on the port side, and the raw-water impeller is awkward to reach on port. Tight access raises labor cost on routine service. src: Trawler Forum

Air draft

CONTEXT
Folding electronics mast lowers air draft for the Loop A defining Loop-friendly feature is the hinged electronics mast, which folds aft on a hinge plate secured with wing nuts, substantially lowering the boat's height. This is what makes the inland canal sections practical. Owners report a large difference between mast-up and mast-down height. Note that later flybridge enclosures, hardtops, Biminis, and newly added radar antennas can defeat the folding-mast advantage, and a boat that once did the Loop may since have gained height. src: Essex Yacht Sales; YachtBuyer review; Trawler Forum owner's-manual thread
Your move: Measure the actual air draft of this specific hull with the mast down and everything foldable lowered, and make a written list of what can and cannot be lowered.

Draft & hull

CONTEXT
Semi-displacement hull with moderate draft The 46 Classic is a semi-displacement (semi-planing) hull with moderate draft, giving it good range at displacement speeds and the ability to move faster at a large fuel penalty. Draft figures published for the model sit in the low-4-foot range depending on load and source; confirm the loaded draft on the actual boat. src: Chesapeake Bay Magazine; Trawler Forum owner's-manual thread

Range & fuel

CONTEXT
Range is dominated by speed on this semi-displacement hull Fuel burn is driven far more by speed than by engine size; the hull becomes very thirsty above roughly 9–10 knots. Held to displacement/trawler speeds the boat has generous range from its large fuel capacity, but pushed toward hull speed the range falls off sharply. Plan Loop range at the slower speed you will actually cruise. src: boats.com review; YachtBuyer review

Reading the boat

CLAIM
Teak decks and cap rails need ongoing upkeep On the 46 Classic the exterior teak is the decks and cap rails, per a Denison review, with teak throughout the interior. Teak decks in particular can leak and need expensive refit work as bungs, seams and fasteners age. Condition varies enormously between owners who kept it up and those who let it go. src: Denison Yacht Sales review
Your move: Have the surveyor check teak deck seams and fastenings for leaks and soft core underneath, and get any recent teak refit documented.

Engines

The engines research is part of the full profile inside the product. It covers factory options, tested performance and the engine-specific questions in our members' dossiers, and it travels with every dossier and survey brief built on this model.

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