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Model profile · for Great Loop buyers
Grand Banks 42 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.
A durable, high-maintenance wood-heavy trawler whose Loop viability hinges on mast height and deck-core condition, with reliability driven by which engine the hull got.
The Grand Banks 42 Classic is a well-regarded, well-built semi-displacement trawler with a long production run and many engine options over that time. For Great Loop use, the two dominant concerns are air draft (the stock mast is too tall and is routinely shortened or fitted with a tabernacle) and teak-deck / subdeck core rot common to the wood-heavy design. Engines are generally durable, but reliability, parts availability, and engine-room access vary sharply by which engine a given hull received, so identifying the specific engine and its service history matters more than the model name.
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How to read the tags on this page.
CLAIMstated by one source, not yet confirmed
QUESTIONopen, and settled by looking at the boat itself
CONTEXTbackground on how this model is built or used
Sources are linked where published.
Air draft / bridge clearance
CLAIM
Stock mast makes the boat too tall for the Loop's controlling fixed bridges until modified
The stock configuration carries a mast that puts air draft around 22'6" to the masthead, well above what the Loop's controlling fixed bridges allow. Owners routinely address this by shortening the mast or fitting a tabernacle / fold-down mast; brokerage listings advertise attainable heights well below stock once modified, and many GB42s marketed as 'Great Loop veteran' have already had this work done. What matters is the actual attainable air draft of the specific boat and what can be lowered, not the stock spec.
src:
Trawler Forum, 'Grand Banks 42 vertical clearance' and 'GB 42 Classic Air draft?'; Curtis Stokes brokerage listings
Your move: Measure the actual air draft of this hull with everything lowered, and get in writing whether the mast is shortened, on a tabernacle, or still stock, and what its lowest attainable height is.
QUESTION
Has the mast on this boat been shortened or fitted with a tabernacle, and to what attainable height?
The Loop-relevant variable is whether a prior owner already modified the mast. Some hulls have a tabernacle allowing the mast to fold; others were cut down permanently; others remain stock. This directly determines whether the boat can do the Loop without further work.
src:
Trawler Forum, 'Grand Banks 42 vertical clearance'
Your move: Ask the broker for documentation of any mast modification and the lowest attainable height, and confirm by measurement at the dock.
From owners
CLAIM
A Lehman 135 that stalled docking, then wouldn't start: the throttle governor had slipped past its stop screws
On his 1985 42 Classic with Ford Lehman 135s, the port engine ran fine until it stalled while docking, and the next day it wouldn't start. The governor on the throttle had slipped outboard of the idle and full-throttle adjustment screws. Pumping the throttle got the engine started, and once the governor was moved back to contact those screws, it hasn't stalled since and has started every time. Reported at about 10,200 engine hours.
src:
Owner report: Douglas Wefer aboard Winelight, 1985 Grand Banks 42 Classic (Oct 2026)
Engine access
CONTEXT
Engine-room access is via a floor hatch and is tighter with wider engines
Access is typically through a floor hatch forward of the engines, with the working space between the two engines. With twin inline Lehmans it is tight but workable; with wider V8s such as the Cat 3208 it is cramped. Descriptions vary by engine and hull year, so treat spaciousness as boat-specific.
src:
Trawler Forum, 'Grand Banks Fuel Consumption'
Fuel & range
CONTEXT
Treat listing fuel-burn figures skeptically
Experienced owners warn that broker-listed gph numbers are often unrealistically low; a GB42 will not achieve figures like 1.2 gph at cruise on any engine. Use owner-reported and published-test numbers as a sanity check rather than trusting the listing.
src:
Trawler Forum, 'Engine choice on Grand Banks 42'
Deck & structure
QUESTION
What is the condition of the teak decks and the plywood subdeck core beneath them?
The 42 Classic is a wood-heavy design, and teak decks over a plywood subdeck are a known area for water intrusion and core rot where fasteners and seams have let go. Rot in the subdeck is expensive to repair and is one of the most consequential findings on these boats. This is a hull property, not tied to any engine.
src:
Grand Banks owner community; general trawler survey practice
Your move: Have the surveyor moisture-map the decks and cabin top and probe suspect areas, and budget for teak-deck / core repair based on the findings.
Reading the boat
CONTEXT
Overall a well-built but maintenance-intensive design
The GB42 Classic is respected for build quality but carries significant wood (decks, trim, and often interior joinery) that demands ongoing upkeep. A well-kept boat can be excellent; a neglected one accumulates deferred costs across brightwork, decks, and systems. Condition and maintenance history separate a good buy from a money pit far more than the model itself.
src:
Trawler Forum, multiple threads; Denison Yacht Sales / Sea magazine review
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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