American Tug 41
Built 2005–2009 by American Tugs (Washington)
About the American Tug 41
Researched from public sources for this model. Any individual boat may have been modified or repowered — confirm before relying on any figure.
- Built
- 2005–2009
- Builder
- American Tugs (Washington)
- Length
- 43.58 ft
- Waterline
- 38.5 ft
- Beam
- 15.83 ft
- Draft
- 4.83 ft
- Displacement
- 35,360 lb
- Hull / keel
- semi-displacement
- Propulsion
- inboard
- Fuel
- 640 gal
- Water
- 210 gal
- Holding
- 60 gal
- Bow thruster
- standard
Tank capacities — where the figures come from
-
Fuel 640 gal
“640 gallons of fuel” — search excerpt (2005), boattrader.comOne listing agrees; no builder document for the original 41 found.
-
Water 210 gal
“210 gallons of water” — search excerpt (2005), boattrader.comOne listing agrees.
-
Holding 60 gal
“a 60-gallon holding tank” — search excerpt (2005), boattrader.comOne listing agrees.
-
Water heater unknown
“Hot Water Capacity 12 gallons.” — broker listing, trawlersgreatlakes.comOne broker listing gives 12 gal. For comparison only, the builder's 2013 standard-equipment sheet for the American Tug 435, the later version of this hull, lists an 11 gal heater with heat exchanger and 110 V element as standard; it isn't applied to the 2005-09 American Tug 41 without confirmation.
Tanks are often replaced or added on older boats — check the tank labels or a survey for yours.
Thrusters and steering — where this comes from
-
Bow thruster standard
“A bow thruster and underwater exhaust system are standard; a flybridge is optional.” — review, cdn.denisonyachtsales.com · “The 41 also will feature full walkaround side decks with boarding gates. Like the 34, she will have a bow thruster.” — review, passagemaker.comThe Powerboat Guide text (posted by a broker) says the bow thruster is standard; PassageMaker's pre-launch piece says the 41 would have one like the 34.
-
Steering unknown
No builder, review or owners' source on the steering system found.
Thrusters and steering are often replaced — check the units on your boat before ordering parts.
Sources disagree on standard engine — left blank rather than guessed.
Wide-beam (15.83 ft) pilothouse tug with two queen staterooms. Bow thruster and underwater exhaust standard; flybridge optional. Single 540 hp Cummins cruises 12-14 knots (about 16 top).
Engines fitted
-
Cummins QSC 8.3 (540 hp) — 540 hp, diesel, single
standard
HMY and a Cruising World owner feature (2006 boat) give a single 540 hp Cummins; Power & Motoryacht lists the QSC8.3 540 as the optional engine. A pre-launch PassageMaker piece planned a 480 hp Cummins.Sources: hmy.com · cruisingworld.com · powerandmotoryacht.com · passagemaker.com
-
Volvo Penta D9-500 — 500 hp, diesel, single
standard
Power & Motoryacht's test lists the Volvo D9-500 as standard (its test boat had one); likely the later-production base engine, but the year is not stated.Sources: powerandmotoryacht.com
Boats of the same model can differ — check which engines yours actually has before ordering parts.
Generator
Broker listings show Northern Lights sets of different sizes (7 kW 2009, 8 kW 2007, M753W 2006) and an Onan 11 kW on another boat, so no two boats share a make and size. For comparison only, the 2013 American Tug 435 standard list includes a Northern Lights 9 kW (East Coast) or 6 kW (West Coast) generator.
Known problems for this model
No well-sourced problem reports found yet.
Engines & parts
Cummins QSC 8.3 parts: good
Factory standard engine — you entered “Cummins QSC 8.3 (540 hp)”
Electronic successor to the 6CTA 8.3 on the same C-series base; supported by Cummins dealers and Seaboard Marine (aftercooler and heat exchanger kits).
Parts sources: Seaboard Marine
Common problems (2)
-
Aftercooler failure and seawater intrusion cooling
Owners who lose an aftercooler worry whether corrosion and seawater bypass caused it; regular aftercooler service is the main preventive task.sbmar.com · clubsearay.com
-
Sudden black smoke and sluggish power exhaust
A frequent question is black smoke with lost power, often traced to air/turbo/aftercooler restrictions or a blocked exhaust elbow.sbmar.com · justanswer.com
Maker’s service schedule (13)
| Engine oil & filter change ULSD fuel only | 500 hrs or 1 yr | “Lubricating oil and filter: Drain up to 500 hrs* or 1 year (QSC8.3/QSL9). *500 hour oil drain intervals are available wh” — manufacturer, mart.cummins.com |
| Engine oil & filter change other diesel fuel | 250 hrs or 1 yr | “the number of operating hours can vary between 250 hours (draining and refilling the lube oil and filter and checking dr” — manufacturer, mart.cummins.com |
| Engine pencil zincs | 250 hrs or 6 mo | “Zinc anode: Replace 250 hrs or 6 months” — manufacturer, mart.cummins.com |
| Fuel filters & water separator | 500 hrs or 1 yr | “Spin on fuel filter: Replace 500 hrs or 1 year” — manufacturer, mart.cummins.com |
| Raw-water pump impeller | 500 hrs or 1 yr | “Seawater pump impeller: Replace 500 hrs or 1 year” — manufacturer, mart.cummins.com |
| Air filter / intake silencer | 500 hrs or 1 yr | “Engine mounted air cleaner assembly: Clean 500 hrs or 1 year” — manufacturer, mart.cummins.com |
| Coolant replacement & freeze-point test | 2,000 hrs or 4 yrs | “Cooling system: Flush 2000 hrs or 4 years” — manufacturer, mart.cummins.com |
| Turbocharger inspection | 3 yrs | “Aftercooler assembly (seawater): Inspect for reuse 3 years” — manufacturer, mart.cummins.com |
| Valve clearance check / adjust recreational rating | 1,500 hrs | “Overhead set: Adjust up to 5000 hrs** (QSC8.3/QSL9). **Recreational ratings should adjust the overhead set every 1,500 h” — manufacturer, mart.cummins.com |
| Valve clearance check / adjust commercial rating | 5,000 hrs | “**Recreational ratings should adjust the overhead set every 1,500 hours while commerical ratings can be extended out to” — manufacturer, mart.cummins.com |
| Coolant filter / SCA check | 500 hrs or 1 yr | “Coolant filter: Change 500 hrs or 1 year” — manufacturer, mart.cummins.com |
| Check seawater hoses | 500 hrs or 1 yr | “Seawater hoses: Check 500 hrs or 1 year” — manufacturer, mart.cummins.com |
| Check viscous vibration damper | 2,000 hrs or 4 yrs | “Vibration damper, viscous: Check 2000 hrs or 4 years” — manufacturer, mart.cummins.com |
Service part numbers (5)
| Oil filter | Fleetguard (Cummins-specified) LF9009 | “MMK004SK83 QSC8.3 Marine Service Kit ... LF9009 Oil Filter 1” — manufacturer, cummins.com |
| Fuel filter | Fleetguard (Cummins-specified) FF5488 | “MMK004SK83 QSC8.3 Marine Service Kit ... FF5488 Fuel Filter 1” — manufacturer, cummins.com · “Cummins QSB, QSC, QSL Fuel Filter 3959612 Fleetguard FF5488” — dealer, marineenergy.com.au |
| Fuel pre-filter / separator | Fleetguard (Cummins-specified) FS20202 | “MMK004SK83 QSC8.3 Marine Service Kit ... FS20202 FS Filter 1” — manufacturer, cummins.com |
| Zinc / anode | Cummins 006824100 × 3 | “MMK004SK83 QSC8.3 Marine Service Kit 006824100 Plug, Zinc Electrode 3” — manufacturer, cummins.com |
| Cummins QSC8.3 marine service kit (zincs, oil, fuel and FS filters, water-pump kit) | Cummins MMK004SK83 | “MMK004SK83 QSC8.3 Marine Service Kit” — manufacturer, cummins.com |
From the engine maker’s parts lists, or two independent parts dealers. Numbers change with serial number and get superseded — check yours before ordering.
Model sources (6)
hmy.com · cruisingworld.com · powerandmotoryacht.com · passagemaker.com · trawlersgreatlakes.com · cdn.denisonyachtsales.com
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Other American Tug models
- American Tug 34 2001–2011
Researched from public sources. Spotted an error? The sources are listed above — tell us what they got wrong.