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Model profile · for Great Loop buyers
American Tug 34
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 beamy, single-diesel pocket trawler with excellent Loop clearances; watch the below-waterline exhaust riser/turbo layout and confirm which engine a given hull carries.
The American Tug 34 (later updated as the 365) is a well-regarded single-engine semi-displacement cruiser designed around a beamy Lynn Senour hull, with roughly 200 of the 34/365 line built since 2000. Its low air draft and shallow draft make it a strong Great Loop candidate, and it carries a loyal owner base, which also means published criticism is thin. The most concrete model-specific concern is the below-waterline exhaust elbow/riser layout and its history of corrosion and water intrusion into the turbo. Engine options varied over the run (Cummins QSB most common, some Volvo), so confirm what a specific hull actually has.
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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.
Overview
CLAIM
Single-engine semi-displacement pocket trawler on a beamy hull
The AT 34 is a single-diesel cruiser with no wing engine, built on a hull that traces back to an Alaska fishing boat design by Lynn Senour with a beam of about 13'3", making it unusually beamy for its length. About 200 of the 34/365 line have been built since 2000. The wide beam buys comfort and stability at the cost of economy.
src:
Trawler Forum; European reviewer commentary
Air draft
CLAIM
Low air draft is a genuine strength for the Loop
Listings and owner reports put air draft in the roughly 14'4"-14'9" range with a marketed ability to reduce further, which clears the controlling structures on the Loop and most side trips comfortably. This is one of the model's best Loop attributes.
src:
Curtis Stokes brokerage listing; Trawler Forum (AT 395 thread)
CONTEXT
Measured air draft depends on what's mounted up top
Real air draft is the height as the boat actually travels. Antennas, radar, arch and accessories add to it, and used boats are frequently modified, so two hulls with the same model name can differ. Anything on the mast/arch that folds or unbolts changes the number.
src:
TheCenterOf (Great Loop planning site)
Your move: Measure the actual air draft of your candidate hull in realistic cruising trim and list every item that can be lowered or removed.
Draft
CLAIM
Shallow draft suits the whole Loop
Reported draft is about 3'5", which is well under the threshold where any Loop route or side trip becomes a concern.
src:
Curtis Stokes brokerage listing; Trawler Forum
Fuel and range
CLAIM
Efficient at displacement speed but thirsty for its length
At a displacement cruise around 8-9 knots owners report roughly 3.9-7.6 gph depending on engine and loading, rising steeply toward ~17-20 gph near hull speed (~17-18 knots). Total fuel is typically 400 gal (two 200-gal tanks). The recurring caveat is that the beamy hull burns perhaps 25% more than boats with a finer length-to-beam ratio; one reviewer found it less economical than a comparable Nordic Tug despite the shared designer.
src:
PassageMaker review; boats.com (365) review; Trawler Forum; Tugnuts forum
CONTEXT
Factory sea-trial burn figures are best-case
Several quoted low-rpm burn numbers come from factory sea trials on a light boat in flat water; loaded, real-world cruising will consume more. Treat published gph as optimistic when planning fuel stops.
src:
Trawler Forum (QSB 380 owner sea-trial data)
Your move: On sea trial, record your own gph at your intended cruise rpm with the boat loaded, and plan range off that figure with reserve.
CLAIM
One owner at 7 knots: 1.8 gph and 3.87 NM/gal, checked against pump receipts
An American Tug 34 owner with the 380-hp Cummins QSB5.9, about 24,000 lb loaded, reports 1.8 gallons per hour at 7 knots, 3.87 nautical miles per gallon, from the engine's fuel readout confirmed by pump receipts over 10,000 miles. The figure includes some diesel heater use.
src:
Trawler Forum, 'Fuel use, NMPG, Personal experience from Members' thread (Oct 2026)
Reading the boat
CONTEXT
Thin published criticism reflects a loyal owner base, not absence of issues
Owner loyalty is a consistent theme and one key data source is not openly searchable, so negative reports are sparse. Don't read the quiet as proof there are no problems. Lean on a thorough survey.
src:
Trawler Forum; Tugnuts forum
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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