Sea Ray 370 Sedan Bridge
Built 1991–1997 by Sea Ray Boats
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About the Sea Ray 370 Sedan Bridge
Researched from public sources for this model. Any individual boat may have been modified or repowered — confirm before relying on any figure.
- Built
- 1991–1997
- Builder
- Sea Ray Boats
- Length
- 40.83 ft
- Beam
- 12.33 ft
- Draft
- 2.58 ft
- Displacement
- 14,600 lb
- Hull
- fiberglass
- Hull / keel
- planing
- Propulsion
- inboard
- Fuel
- 250 gal
- Water
- 70 gal
- Holding
- 20 gal
- Stern thruster
- not fitted
Tank capacities — where the figures come from
-
Fuel 250 gal
“250 US Gallons / 946 Litres” — spec database (1992), everythingsearay.com · “250 gallons (2 tanks)” — search excerpt (1995), kentmorrmarina.netAn enthusiast archive of factory specs and several listings agree; no builder document was checked. One listing says the fuel is in two tanks.
-
Water 70 gal
“70 US Gallons / 264 Litres” — spec database (1992), everythingsearay.com · “70 gallons of water” — search excerpt (1996), boattrader.comNon-builder sources agree; no builder figure could be checked.
-
Holding 20 gal
“Holding Tank Capacity: 20 gallons” — search excerpt (1995), kentmorrmarina.net · “a 20-gallon holding tank” — search excerpt (1996), boattrader.com · “1 tank (s), capacity 20 gallons” — search excerpt (1996), deltamarinesales.comOnly listings give this, and they likely share one spec database. 20 gal is small for a 40-ft boat, but nothing contradicts it.
-
Water heater unknown
No builder spec sheet for 1991-97 was found; spec databases only list a water heater, without a size.
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 unknown
No builder spec sheet or option list for 1991-97 was found. A later sister model from the 380/400 era offered bow thrusters as an option, but that doesn't carry over.
-
Stern thruster not fitted
Our earlier figure of none has no source, and nothing was found either way.
-
Steering unknown
A buyer's-guide summary mentions a tilt steering wheel and an optional lower helm but not the steering system.
Thrusters and steering are often replaced — check the units on your boat before ordering parts.
Sources disagree on engines[MerCruiser].hp, hp (standard gas engines) — left blank rather than guessed.
Solid fiberglass deep-V (21 deg) with prop pockets and side exhausts. Hull length 36.8 ft; LOA includes platform. Lower helm optional. Narrow side decks.
Engines fitted
-
MerCruiser 7.4L V8 inboard (454) — 310 hp, gas, twin
standard
HMY: standard 310 hp MerCruiser gas inboards cruise about 18 kn (mid-high 20s top); its BoatUS note says 340 hp. Listings show twin 310 hp MerCruisers (1995, 1997 7.4 EFI) and twin 340 hp MerCruisers (1992, 1996 7.4 MPI), so both ratings occur.Sources: hmy.com · everett.boatshed.com · powerboatlistings.com
-
Caterpillar 3116 TA — 300 hp, diesel, twin
factory option
A 1997 370 Sedan Bridge listing has twin Cat 3116 300 hp diesels; search results also show a 1992 boat with twin 3116s (not read).Sources: boats-from-usa.com
Boats of the same model can differ — check which engines yours actually has before ordering parts.
Generator
“Standard: 7.5 kW (120V/60 Cycles) Quicksilver Gas Generator; Optional: 9.0 kW Westerbeke Gas, 8.0 kW Quicksilver Diesel,” — spec database (1992), everythingsearay.com · “7.5 Kw Quicksilver generator for 110v power away from the dock” — broker listing (1992), powerboatlistings.com
An enthusiast Sea Ray database copying 1992 factory specs lists a 7.5 kW Quicksilver gas generator as standard, with a 9.0 kW Westerbeke gas or 8.0 kW Quicksilver or Westerbeke diesel as options, and a 1992 listing shows the 7.5 kW Quicksilver. No builder document or review confirms this, so we list no set.
Manuals and brochures online
- Document Sea Ray Documents & Manuals library (spec sheets and owner's manuals searchable by model and year) — searay.com
Hosted by the builder or an owners' association; they own the copyright.
Known problems for this model
No well-sourced problem reports found yet.
Engines & parts
MerCruiser 7.4 (454) V8 gas parts: good
Factory standard engine — you entered “MerCruiser 7.4L V8 inboard (454)”
GM big-block base; Marine Engine Depot and others sell 7.4 L engines and parts, and cast-iron riser kits run a few hundred dollars. Manifold and riser replacement is the main recurring expense.
Parts sources: Marine Engine Depot, Power Boat Supply
Common problems (2)
-
Manifold and riser corrosion exhaust
As with other gas marine V8s, internally rusted manifolds and risers can let water into the engine; periodic replacement is standard practice.powerandmotoryacht.com
-
Rough running and won't rev under load fuel
Common troubleshooting threads trace this to fuel delivery (filters, pump, carburetor) or ignition timing problems.justanswer.com · youtube.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 (4)
| 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 · “14957 FILTER, Oil (1 required per assembly) ... 35-866340Q03 - Oil Filter” — dealer, marineengine.com |
| Fuel filter carbureted engines (Rochester 4-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 |
| Raw-water impeller Bravo sterndrive / inboard with pre-2000 engine-mounted plastic sea water pump |
Mercury Quicksilver 47-59362Q01 Also: Sierra 18-3087 |
“For MerCruiser engines with engine mounted, 2-piece, plastic sea water pumps.” — manufacturer, mercurymarine.com · “Included water Pump Impeller 59362Q01 fits Pre-2000 plastic seawater sea pumps. WILL NOT work on newer (2000+)” — 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 |
From the engine maker’s parts lists, or two independent parts dealers. Numbers change with serial number and get superseded — check yours before ordering.
Caterpillar 3116 parts: limited
Factory optional engine — you entered “Caterpillar 3116 TA”
Supported by Cat dealers by serial number; aftermarket rebuilders (e.g., Big Bear Engine) sell parts and address known problems. Some 3116s built in France ('soft block') were problematic and owners are told to check serial numbers with Cat.
Parts sources: Big Bear Engine Company, Diesel Pro Power
Common problems (4)
-
Failures in high-load use engine
3116s generally do fine in trawlers but problems show up in fast boats run near full power for long periods; poor propping that overloads the engine ages it quickly.trawlerforum.com
-
'Soft block' engines engine
A batch of French-built blocks had a reputation for early failure, sometimes within a few hundred hours.trawlerforum.com
-
Injectors, fuel rack and heads fuel
Owners and rebuilders report injector/injector-cup, fuel rack and cylinder head problems; good maintenance history matters when buying.4btengines.com · facebook.com
-
Low turbo/exhaust mixer height exhaust
The low-mounted turbo and exhaust mixer make it harder to get adequate exhaust riser height, so the exhaust installation needs care to avoid water backflow.trawlerforum.com
Maker’s service schedule (18)
| Engine oil & filter change | 250 hrs or 1 yr | “Every 7500 L (2000 US gal) of Fuel or 250 Service Hours or 1 Year ... Engine Oil and Filter - Change” — manufacturer, oxfordyachtagency.com |
| Fuel filters & water separator | 250 hrs or 1 yr | “Every 7500 L (2000 US gal) of Fuel or 250 Service Hours or 1 Year ... Fuel System Primary Filter/Water Separator Element” — manufacturer, oxfordyachtagency.com |
| Raw-water pump impeller | 250 hrs or 1 yr | “Every 7500 L (2000 US gal) of Fuel or 250 Service Hours or 1 Year ... Auxiliary Water Pump - Inspect” — manufacturer, oxfordyachtagency.com |
| Engine pencil zincs | 50 hrs | “Every 1500 L (400 US gal) of Fuel or 50 Service Hours ... Zinc Rods - Inspect/Replace” — manufacturer, oxfordyachtagency.com |
| Valve clearance check / adjust | 2,000 hrs | “First 7500 L (2000 US gal) of Fuel or 250 Service Hours ... Engine Valve Lash - Inspect/Adjust” — manufacturer, oxfordyachtagency.com |
| Coolant replacement & freeze-point test Cat DEAC / conventional coolant | 1,000 hrs or 2 yrs | “Every 30 000 L (8000 US gal) of Fuel or 1000 Service Hours or 2 Years ... Cooling System Coolant (DEAC) - Change” — manufacturer, oxfordyachtagency.com |
| Coolant replacement & freeze-point test Cat ELC (extended life coolant) | 6,000 hrs or 4 yrs | “Every 182 000 L (48 000 US gal) of Fuel or 6000 Service Hours or 4 Years ... Cooling System Coolant (ELC) - Change” — manufacturer, oxfordyachtagency.com |
| Turbocharger inspection | 1,000 hrs or 2 yrs | “Every 30 000 L (8000 US gal) of Fuel or 1000 Service Hours or 2 Years ... Aftercooler Core - Clean/Test” — manufacturer, oxfordyachtagency.com |
| Turbocharger inspect | 1,000 hrs or 2 yrs | “Every 30 000 L (8000 US gal) of Fuel or 1000 Service Hours or 2 Years ... Turbocharger - Inspect” — manufacturer, oxfordyachtagency.com |
| Heat exchanger & oil cooler cleaning | 2,000 hrs | “Every 60 000 L (16 000 US gal) of Fuel or 2000 Service Hours ... Heat Exchanger - Inspect” — manufacturer, oxfordyachtagency.com |
| Drive belts inspect / replace | 250 hrs or 1 yr | “Every 7500 L (2000 US gal) of Fuel or 250 Service Hours or 1 Year ... Belt - Inspect” — manufacturer, oxfordyachtagency.com |
| Fuel injection timing check | 2,000 hrs | “First 7500 L (2000 US gal) of Fuel or 250 Service Hours ... Fuel Injection Timing - Check” — manufacturer, oxfordyachtagency.com |
| Thermostat (coolant temperature regulator) replace | 3,000 hrs or 2 yrs | “Every 91 000 L (24 000 US gal) of Fuel or 3000 Service Hours or 2 Years ... Cooling System Water Temperature Regulator -” — manufacturer, oxfordyachtagency.com |
| Sea water strainer clean/inspect | 250 hrs or 1 yr | “Every 7500 L (2000 US gal) of Fuel or 250 Service Hours or 1 Year ... Sea Water Strainer - Clean/Inspect” — manufacturer, oxfordyachtagency.com |
| Jacket water pump inspect | 250 hrs or 1 yr | “Every 7500 L (2000 US gal) of Fuel or 250 Service Hours or 1 Year ... Water Pump - Inspect” — manufacturer, oxfordyachtagency.com |
| Coolant SCA test/add | 250 hrs or 1 yr | “Every 7500 L (2000 US gal) of Fuel or 250 Service Hours or 1 Year ... Cooling System Supplemental Coolant Additive (SCA)” — manufacturer, oxfordyachtagency.com |
| Hoses and clamps inspect/replace | 250 hrs or 1 yr | “Every 7500 L (2000 US gal) of Fuel or 250 Service Hours or 1 Year ... Hoses and Clamps - Inspect/Replace” — manufacturer, oxfordyachtagency.com |
| Crankcase breather clean | 250 hrs or 1 yr | “Every 7500 L (2000 US gal) of Fuel or 250 Service Hours or 1 Year ... Engine Crankcase Breather - Clean” — manufacturer, oxfordyachtagency.com |
Service part numbers (3)
| Oil filter | Sources disagree: 1R-0658 / 324-2598 | “**Oil Filter** **CAT 1R-0658** | 3126B C7 3306 3304 3116 C4.2 3046 3066” — dealer, marineenergy.com.au · “Caterpillar 324-2598 Advanced Efficiency 3116 and 3126 Diesel Engine Oil Filter” — dealer, marineengineparts.com |
| Fuel filter | Caterpillar 1R-0751 Also: Baldwin BF7632, Fleetguard FF5324, WIX 33626 |
“Caterpillar 1R-0751 Advanced Efficiency 3116 and 3126 Diesel Engine Fuel Filter” — dealer, marineengineparts.com · “the secondary fuel filter Cat specifies for the 3114, 3116, 3126/B/E, C7, and C9 family” — dealer, allprodiesel.net |
| Raw-water impeller keyway-shaft Sherwood seawater pump |
Sherwood 17000K | “| **Impeller** | 17000K KEY WAY |” — dealer, marineenergy.com.au · “Caterpillar Marine Engines ... Common applications include: ... CAT 3116” — dealer, marisolmarine.com |
| Zinc / anode | Caterpillar 6L-2283 × 3 | “**Anode kit CAT3116** | 3 x 6L2283 2 x 6L2281 1 x 6L3104” — dealer, marineenergy.com.au · “Zinc Anode for Caterpillar Marine Engines 6L2283 NPT: 1/4”” — dealer, dieselpro.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 · everett.boatshed.com · powerboatlistings.com · boats-from-usa.com · everythingsearay.com · powerboatlistings.com
Other Sea Ray models
- Sea Ray 270 Sundancer (1994-97, 1999) 1994–1999
- Sea Ray 300 Sundancer (1994-97) 1994–1997
- Sea Ray 330 Sundancer (1995-99) 1995–1999
- Sea Ray 340 Sundancer (1999-2002) 1999–2002
- Sea Ray 380 Sundancer (1999-2003) 1999–2003
- Sea Ray 400 Sedan Bridge 1996–2003
Researched from public sources. Spotted an error? The sources are listed above — tell us what they got wrong.