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Model profile · for Great Loop buyers
Monk 36
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, well-liked classic trawler whose biggest risks are age-related (corroding fuel tanks and wet cored decks on older boats), not a design flaw.
The Monk 36 is a classic Ed Monk-designed sedan trawler built over roughly a 25-year run (early 1980s to the mid-2000s), with 250+ hulls produced. It's really several boats: construction started in Taiwan and moved to Nova Scotia in 1991, and owners consistently say that split matters when buying. Engine options varied enormously across the run. The yard would fit almost anything, so the specific hull's engine, tank material, and deck construction must be assessed individually. Well-regarded for a solid-glass hull and displacement-cruising manners, but aging fuel tanks, cored decks, and a stern-tube quirk are the recurring themes.
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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.
From owners
CLAIM
The original fuel tanks failed in 2024, and the bow thruster tunnel delaminated
On a 1985 Monk 36, the owner reports both fuel tanks failed in 2024, which the owner puts down to poor galvanic protection. Both were replaced with new aluminum tanks, and with the engine out, the exhaust piping and the transmission damper plate were replaced too. The bow thruster tunnel delaminated in 2025 and was repaired, with the thruster upgraded to 24 volts. Other work on the owner's list: the forward air conditioner and the water heater in 2023, the galley refrigerator in 2025, and the stern thruster and windlass in 2026. The owner adds that the hull blisters a surveyor noted at purchase in 2022 were professionally repaired, and two soft spots in the deck had the core removed and replaced and the nonskid renewed.
src:
Owner report: John Lewis aboard Renown, 1985 Monk 36 (Oct 2026)
Fuel system
CLAIM
Aging black-iron fuel tanks are the single most-cited problem
Corroding steel fuel tanks are the recurring headline issue. A broker reported selling two Monk 36s in a year with rusted/corroded tanks as the big issue, and buyers have walked from deals after rust was found on tank tops. Tanks typically rust and leak from the top, where condensation and leaky deck filler fittings cause corrosion. Replacement is major work. A comparable Grand Banks 36 tank job quoted at $30,000 doubled with yard fees, and in a worst case a Monk fuel-tank leak required engine removal to replace the tank.
src:
Trawler Forum, 'Monk 36', 'Monk 36 Fuel Tank Replacement', 'Monk 36 purchase'
Your move: Insist the surveyor inspect the tank tops specifically, and budget for potential replacement.
QUESTION
What material are the fuel tanks, and have the tops been inspected?
Tank material varies by boat. Most are black iron/steel, but at least one broker listing describes a Monk 36 with stainless steel tanks. Because corroded steel tanks are the most expensive common failure on this model and rust starts on the top surface where it's hard to see, material and current condition must be established before an offer.
src:
Trawler Forum, 'Monk 36'; Huckins Yacht listing ('Old Spice')
Your move: Ask the broker for the tank material and any tank inspection or replacement records, and have the surveyor examine the tank tops directly.
Hull & decks
CLAIM
Hull is solid glass; decks are cored and prone to moisture
Owners consistently confirm the hull (including the transom) is solid fiberglass, which they view positively. The decks, however, are cored and prone to moisture, especially on older Taiwan-built boats. One owner replaced about 12 sq ft of spongy aft-deck core. Owners advise you're unlikely to find an early-'80s Taiwan boat without soft decks unless the core has already been repaired. Repair runs roughly $4–5K in DIY materials to $20K+ if hired out.
src:
Trawler Forum, 'Monk 36', '83 Monk 36', 'Monk 36 listed as wet stern'
Your move: Have the surveyor moisture-map the decks (especially the aft deck) and get any wet-core repair scoped and priced.
CONTEXT
Owners often favor Nova Scotia boats over early Taiwan boats
Production moved from Taiwan to Nova Scotia in 1991. Multiple owners advise looking at the Canadian-built boats over the Taiwanese boats, largely on deck-core and finish grounds. This is a general buying-preference pattern, not a guarantee any individual hull follows it.
src:
Trawler Forum, '83 Monk 36'
CLAIM
Teak decks (where fitted) and leaking windows are year-dependent risks
Some Monk 36s avoid exterior teak entirely, which owners count as a plus. Where teak decks do exist they're a leak and repair risk. The common fix is removing the planking, repairing the substrate, then glassing and painting. Separately, at least one owner reports the cabin windows leak and uses covers. Both vary by hull and year.
src:
Trawler Forum, 'Monk 36', 'Monk 36 or Ocean Alexander 40'
Your move: Check for exterior teak decks and test the windows for leaks; price any teak removal or window rebedding into your offer.
CLAIM
Older hulls may have blister history
One Looper's 1986 Monk had hull blisters that took five months in North Florida to dry and rebuild. Blistering is age- and history-dependent rather than universal, but older hulls warrant a barrier-coat and blister check.
src:
Trawler Forum, 'Buyin' a Monk 36.. Survey Help'
Your move: Ask about any barrier coat and blister-repair history, and have the surveyor sound the hull below the waterline.
Running gear
QUESTION
Has the stainless stern tube been inspected or replaced for pitting?
A model-specific gotcha: the shaft runs through a stainless-steel stern-tube sleeve that can pit, corrode, and leak. Owners report fixes ranging from cutting out and replacing the tube with fiberglass, to sliding in a fiberglass insert tube and sealing it (the less-expensive route); the owners' association also cites Centek replacement as a common fix. This is a known area to scope before purchase.
src:
Trawler Forum, 'Buyin' a Monk 36', 'Monk 36 purchase'; Monk 36 Owners Association (groups.io)
Your move: Ask whether the stern tube has been inspected or replaced, and have the surveyor check it for pitting and leaks.
Great Loop fit
CONTEXT
Sedan-trawler profile: measure air draft and identify what lowers
As a classic sedan trawler the Monk 36 carries a flybridge with mast, antennas, and often a radar arch or hardtop that set the true overhead height. Actual air draft depends on how the specific boat is rigged and what can be folded or removed. Establish the real measured height and what comes down before committing to a Loop routing.
Your move: Measure the actual air draft to the highest fixed point and confirm which items (mast, antennas, arch) can be lowered or removed.
CONTEXT
Single-engine, keel-protected trawler handling
Most Monk 36s are single-engine displacement trawlers with a protected running gear arrangement, which suits the Loop's canals, locks, and long slow-speed runs and generally means economical fuel burn at hull speed. Single-screw boats are less maneuverable in tight quarters, so a bow (and sometimes stern) thruster is a common and welcome addition on this model.
Your move: Confirm whether the boat has a thruster, and factor single-screw docking into your locking and marina plans.
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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