Meridian 411 Sedan
Built 2003–2008 by Meridian Yachts (Brunswick)
About the Meridian 411 Sedan
Researched from public sources for this model. Any individual boat may have been modified or repowered — confirm before relying on any figure.
- Built
- 2003–2008
- Builder
- Meridian Yachts (Brunswick)
- Length
- 46 ft
- Beam
- 14.17 ft
- Draft
- 3.75 ft
- Displacement
- 25,000 lb
- Hull / keel
- planing
- Propulsion
- inboard
- Fuel
- 400 gal
- Water
- 150 gal
- Holding
- 55 gal
- Water heater
- AC
- Generator
- fitted on some boats
- Bow thruster
- factory option
- Stern thruster
- factory option
Tank capacities — where the figures come from
-
Fuel 400 gal
“Fuel Tank: 400 Gallons (1514.16 Liters)” — search excerpt, curtisstokes.net · “400 gallons” — search excerpt (2007), boats.com · “Fuel capacity of 1500lt” — review, denisonyachtsales.comListings agree on 400 gal; a reprinted boat review gives 1,500 L (about 396 gal, the same tank in round metric figures). No builder figure was checked.
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Water 150 gal
“Fresh Water: 150 Gallons (567.81 Liters)” — search excerpt, curtisstokes.net · “Water: 570lt” — review, denisonyachtsales.comListings and a review agree; no builder figure was checked.
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Holding 55 gal
“Holding Tank: 55 Gallons (208.2 Liters)” — search excerpt, curtisstokes.net · “Holding tank: About 200lt” — review, denisonyachtsales.comListings and a review agree within rounding; no builder figure was checked.
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Water heater AC
Meridian's 411 owner's manual appears to list a water heater on the 110 V AC panel, though the manual itself couldn't be checked; no review or listing gave a capacity.
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 factory option
“The 411 also features Docking On Command (DOC), a combination bow and stern thruster from Sidepower linked to a boat-sha” — search excerpt (2005), boatsales.com.au · “The 411 also features Docking On Command (DOC), a combination bow and stern thruster from Sidepower” — review (2005), denisonyachtsales.com · “The 2003 model year for Meridian was the only year that Docking on Command was an option. It was a standard feature on a” — search excerpt (2003-2004), meridianyachtowners.comA 2005 Australian review, reposted by Denison, describes the Side-Power Docking On Command bow-and-stern system and doesn't list it among the test boat's options. An owners'-forum reply says it was optional only for the 2003 model year and standard from 2004, but without a builder list, standard for 2004-08 isn't confirmed.Side-Power — Model and size not stated.“a combination bow and stern thruster from Sidepower” — review (2005), denisonyachtsales.com
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Stern thruster factory option
“The 411 also features Docking On Command (DOC), a combination bow and stern thruster from Sidepower” — review (2005), denisonyachtsales.com · “The 2003 model year for Meridian was the only year that Docking on Command was an option. It was a standard feature on a” — search excerpt (2003-2004), meridianyachtowners.comOur earlier figure of none is wrong: the stern thruster is part of Meridian's Docking On Command system (2005 review), optional for 2003 and standard from 2004 according to the owners' forum.Side-Power — Model and size not stated.“a combination bow and stern thruster from Sidepower” — review (2005), denisonyachtsales.com
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Steering unknown
No source describing the steering could be cited, and the owner's manual couldn't be checked. Manuals for the sister 341 and 381 sedans describe power-assisted hydraulic steering, which suggests the same here, but it isn't confirmed.
Thrusters and steering are often replaced — check the units on your boat before ordering parts.
Sources disagree on hp (optional Cummins diesels) — left blank rather than guessed.
Over 300 reportedly sold. Two staterooms, galley up, engine room through a salon hatch; lower helm optional. Very flat (7 deg) deadrise. LOA 46 ft per HMY includes platform/pulpit. Build count (approximate, not stored): HMY: over 300 reportedly sold.
Engines fitted
-
MerCruiser 8.1S Horizon (8.1L gas V8) — 370 hp, gas, twin
standard
HMY: standard 370 hp MerCruiser gas engines cruise at 18 kn; a 2004 411 advertised with twin MerCruiser 8.1S Horizons at 370 hp.Sources: hmy.com · facebook.com
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MerCruiser 8.1 HO Horizon (8.1L gas V8) — 420 hp, gas, twin
factory option
High-output 8.1 gas engines at 420 hp appear on 2003, 2005 and 2006 boats in dealer and social-media listings (read as search excerpts only, so treat as weaker evidence).Sources: yachts360.com · facebook.com
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Cummins QSB 5.9 — 380 hp, diesel, twin
factory option
Optional diesels: HMY quotes 370 hp Cummins (low-20s cruise); a 2007 411 lists twin QSB 5.9s at 380 hp and a 2006 boat twin 380 hp Cummins; another 2006 boat had twin 330 hp Cummins.Sources: hmy.com · hmy.com · canadianyachts.com
- Cummins diesel — 370 hp, diesel factory option
Boats of the same model can differ — check which engines yours actually has before ordering parts.
Generator
Generators seen on 411s differ with engine type: an Onan 11.5 kW diesel set on diesel-era boats, and a Kohler 10 kW on a gas-engine boat (one listing only). No builder document or review found saying whether a generator was standard or optional.
-
Onan 11.5 MDKBM — 11.5 kW, diesel
Named on a broker listing and in a Meridian owners' forum thread; these are probably but not certainly different boats. Whether factory-installed is not stated.“An Onan 11.5 kW generator” — broker listing, curtisstokes.net · “411 Onan 11.5MDKBM Generator” — search excerpt, meridianyachtowners.com
Generators are often replaced or added — check the unit's own plate before ordering parts.
Known problems for this model
No well-sourced problem reports found yet.
Engines & parts
MerCruiser 5.0 (305) / 5.7 (350) V8 gas parts: good
Factory standard engine — you entered “MerCruiser 8.1S Horizon (8.1L gas V8)”
GM small-block Chevrolet base engines, so internal parts are everywhere. Marine exhaust manifolds and risers for 1983–2002 small blocks are sold by many aftermarket makers (Sierra, Barr, Osco and others) through Power Boat Supply, Hardin Marine, Basic Power Industries and similar stores; Mercury sells genuine parts through dealers.
Parts sources: Power Boat Supply, Hardin Marine, Basic Power Industries
Common problems (2)
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Manifold/riser failure and water in cylinders exhaust
Cast-iron manifolds and risers rust internally or their gaskets fail, letting water back into the cylinders; small amounts cause hard starting and rough running, large amounts hydrolock and wreck the engine. Service roughly every 7 years in fresh water and about 5 in salt.powerandmotoryacht.com · forums.iboats.com · justanswer.com
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Overheating from scaled manifolds cooling
Rust and scale inside the manifolds restrict cooling flow and cause overheating under load.powerandmotoryacht.com
Maker’s service schedule (8)
| Engine oil & filter change | 100 hrs or 1 yr | “Most four-stroke outboards and sterndrive engines require an oil change either annually or every 100 hours of operation.” — manufacturer, mercurymarine.com |
| Fuel filters & water separator | 100 hrs or 1 yr | “The fuel filter on your engine should be inspected or replaced per the maintenance schedule in your owner's manual, usua” — manufacturer, mercurymarine.com |
| Raw-water pump impeller | 300 hrs or 3 yrs | “How often should my seawater pump impeller be serviced? Every 300 hours or 3 years, whichever comes first.” — manufacturer, mercurymarine.com |
| Spark plugs inspect / replace | 300 hrs or 3 yrs | “How often should spark plugs be changed? Every 300 hours or 3 years, whichever comes first.” — manufacturer, mercurymarine.com |
| Coolant replacement & freeze-point test closed (freshwater) cooling only | 5 yrs | “How often should coolant be changed on engines with closed cooling? Every 5 years.” — manufacturer, mercurymarine.com |
| Transmission fluid change sterndrive gear lube | 1 yr | “Gearcase lubricant in outboard and sterndrive lower units should also be changed annually or at the service interval spe” — manufacturer, mercurymarine.com |
| Lubricate steering linkage and check power-steering fluid sterndrive | 100 hrs or 1 yr | “Mercury Marine recommends lubricating the steering linkage and checking the power steering fluid level in ... MerCruiser” — manufacturer, mercurymarine.com |
| Check power trim fluid level sterndrive | 100 hrs or 1 yr | “Power trim and tilt fluid level should be checked annually or every 100 hours.” — manufacturer, mercurymarine.com |
Service part numbers (6)
| Oil filter | Mercury Quicksilver 35-866340Q03 | “Part number: 866340Q03 ... for MerCruiser sterndrive and inboard engines except V6 engines with the oil filter mounted o” — manufacturer, mercurymarine.com · “Includes: Oil Filter Oil Filter 866340Q03 Fuel Filter 802893Q01 ...” — dealer, midnightmarine.net |
| Fuel filter carbureted engines (Rochester 2-/4-barrel, MerCarb 2-barrel): filter inside carburetor fuel inlet |
Mercury 53336T | “For use on MerCruiser 3.0L, 4.3L, 5.0L , 5.7L and 7.4L engines with Rochester 2- and 4-barrel and MerCarb” — manufacturer, mercurymarine.com |
| Fuel filter MPI engines with Gen III cool fuel module (filter page: 2004 and newer; kit page: 2002 and newer) |
Mercury Quicksilver 35-8M0093688 | “Fits 2004 and newer Mercury/MerCruiser sterndrive and inboard engines with Gen III (3) fuel cooler” — manufacturer, mercurymarine.com |
| Raw-water impeller Bravo sterndrive and inboard engines with engine-mounted sea water pump (2-piece plastic pump per Mercury) |
Mercury Quicksilver 47-59362Q01 Also: Sierra 18-3087 |
“For MerCruiser engines with engine mounted, 2-piece, plastic sea water pumps.” — manufacturer, mercurymarine.com · “Water Pump Impeller 59362Q01” — dealer, midnightmarine.net |
| Thermostat standard cooling, 160 F |
Mercury Quicksilver 807252Q5 | “Thermostat 807252Q5 is for V6 and V8 MerCruiser engines ... made by General Motors (model year 1987-2016)” — manufacturer, mercurymarine.com |
| 100-hour maintenance kit (oil filter, fuel filter, drive seals) MPI engines with Gen III cool fuel module (2002 and newer) |
Mercury 8M0147053 | “Mercury 8M0147053 MerCruiser 5.0L, 5.7L, 6.2L, 8.1L and 8.2L V8 MPI ... 100 Hour Maintenance Kit” — manufacturer, mercurymarine.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.
Cummins QSB 5.9 parts: good
Factory optional engine — you entered “Cummins QSB 5.9”
Electronically controlled (common-rail) successor to the mechanical 6BTA; current Cummins dealer network plus marine specialists such as Seaboard Marine supply parts. Electronic diagnostics require dealer tools more often than on the 6BTA.
Parts sources: Seaboard Marine, Diesel Pro Power
Common problems (3)
-
Raw water pump leaks cooling
Owners most often report the seawater pump leaking or being replaced around 1000 hours; an improved pump version is available. Some also updated fuel coolers as a precaution.forums.ybw.com
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Aftercooler service and cracking cooling
As with the 6BTA, the aftercooler needs periodic removal and resealing; a cracked aftercooler is generally replaced rather than repaired.trawlerforum.com · facebook.com
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Burnt intake valves / loss of power engine
Seaboard Marine forum threads describe burnt valves and high-rpm power loss on some QSB 5.9s.sbmar.com
Service part numbers (5)
| Oil filter | Fleetguard (Cummins-specified) LF3959 Also: Cummins 3937743 |
“MMK001SK59 QSB5.9 Marine Service Kit ... LF3959 Oil Filter 1” — manufacturer, cummins.com |
| Fuel filter | Fleetguard (Cummins-specified) FF5488 | “MMK001SK59 QSB5.9 Marine Service Kit ... FF5488 Fuel Filter 1” — manufacturer, cummins.com |
| Fuel pre-filter / separator | Fleetguard (Cummins-specified) FS20402 | “MMK001SK59 QSB5.9 Marine Service Kit ... FS20402 FS Filter 1” — manufacturer, cummins.com |
| Drive belt serpentine belt, post-Jan 2008 QSB 5.9 with 21/22SI or 24SI alternator (brown belt) |
Cummins 4981117 | “Cummins Serpentine Belt for QSB 5.9 (post January 2008) 21/22 SI Alternator CPN 4981117 (BROWN)” — dealer, sbmar.com · “4981117 Alternator Belt for Cummins® QSB 5.9 Engine” — dealer, seapowermarine.com |
| Cummins QSB5.9 marine service kit (zincs, oil, fuel and FS filters, minor water-pump kit) | Cummins MMK001SK59 | “MMK001SK59 QSB5.9 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 (9)
hmy.com · facebook.com · yachts360.com · facebook.com · hmy.com · canadianyachts.com · denisonyachtsales.com · curtisstokes.net · curtisstokes.net
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Other Meridian models
- Meridian 341 Sedan (2005-14) 2005–2014
- Meridian 381 Sedan (ex-Bayliner 3788) 2003–2006
Researched from public sources. Spotted an error? The sources are listed above — tell us what they got wrong.