← The model library
Model profile · for Great Loop buyers

American Tug 34

What the published record establishes about this model, what owners report, and the questions worth asking while a boat is still a listing. This page is about the MODEL — a specific hull always gets 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.

How to read this: 🟢 Fact = confirmed against a document, spec sheet, or owner. Everything else — Claim, Pattern, Question, Context — is not yet verified: things to check, not settled truth. 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.

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

Looking at a specific 34?

This page is the model's story. The product reads an actual listing against it — your requirements, the hard gates, the record cross-checks, and the questions ready to send. See a full sample dossier first if you like.

Join at the founding rate →

Shopping just one 34? A single workup is $29, one time — this record applied to the actual listing, no subscription.

Not ready for that? Run a boat's numbers against the hard gates first — free, no account, nothing stored.

Spotted something wrong or have first-hand knowledge of this model? Email support@caniloop.net — corrections are how a profile earns its Facts, and credited however you choose. This profile reflects sources opened and verified by a person; it is buyer homework, never a verdict on any hull.