sea ray 390 motor yacht fuel consumption

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Sea Ray 390 Motor Yacht

• By George Sass, Jr.
• Updated: October 4, 2007

During a recent vacation in South Florida I found myself immersed in a conversation with a knowledgeable yachtsman. He had recently sold a 55-foot convertible, and still owned a 35-foot express yacht and a 28-foot sportfisherman. Like anybody with the yachting bug, he was already contemplating his next purchase. What was at top on his list? Another Sea Ray . He had owned several during his yachting career and had had the most fun on his fleet of Sea Ray s ranging from 31 to 40 feet. In his opinion, they offered great volume and creature comforts, and the company’s commitment to customer care stood out among the pool of boatbuilders.

If he is still in the market, I would urge him to take a look at Sea Ray ‘s 390 Motor Yacht. The cruiser builds on the company’s venerable reputation for solid family cruisers backed by first-class service. Her big sister, the 480 Motor Yacht, introduced the 390’s profile to the yachting public. With these two motoryachts, Sea Ray has fine-tuned design elements first put to paper four decades ago by builders such as Chris-Craft and Hatteras.

One of her most notable features is the helm deck area. While cruising along the Tennessee River near Knoxville, Tennessee, in the boiling summer heat, we found ourselves cooled by the optional 16,000 BTU air conditioning system on the helm deck. This area is a sensible hybrid between an express boat with an open helm area that puts guests and driver together, and a flying bridge model that offers good visibility and shelter. Furthermore, if you cruise with young children, closing off the side decks with acrylic doors keeps everybody close and eliminates some of the hassle of lifting smaller kids to the bridge and constantly keeping an eye on the hatch as they scramble around.

The wet bar with a trash receptacle and ice maker (an optional refrigerator can take its place) is abaft the helm seat. Be sure to order the optional aft bench seat and table. Our party found this the perfect perch to sit back and enjoy the cruise while staying hydrated. The position also makes an ideal spot for outdoor dining.

The helm is outfitted to the level you would expect from Sea Ray and is an obvious result of the company’s massive research and development program. Both throttle and gear controls are angled for ease of use. The gauges satisfy a pet peeve of mine and are placed appropriately in the line of sight for a helmsman moving at 20-plus knots. Sea Ray also offers a standard Raymarine electronics package and builds the dash to accommodate it. The well-planned area is accented with a handsome burl. Also, docking and close-quarters maneuvering is a breeze thanks to the expansive aluminum windshield and a properly placed transom door, which allows the helmsman to see the swim platform. Five wide steps lead from the helm deck to the swim platform.

Our test boat was equipped with twin 370 hp MerCruiser 8.1 gas engines turning a set of four-blade 23-by-22-inch props. If you’re looking to do a little more extended cruising, Sea Ray offers twin Cummins 480CEs. With the gas package, expect a peppy performance. We achieved a top speed of 25 knots and a cruising speed of around 20 knots. Best of all, the 390 is quiet, especially on the helm deck. The highest decibel reading we got was 79 at wide open throttle. Bearing in mind the level for normal conversation is about 65 decibels, this reading is very respectable.

Our inland testing ground didn’t allow for any worthwhile sea-state challenges. But the 390 should easily satisfy her role as a comfortable coastal cruiser. Without a bridge, she has a low center of gravity, decreasing roll. Her sharp entry and 15-degree deadrise aft creates an easily driven hull form that is quick to plane and agile, especially considering all the creature comforts. While maneuvering through tight quarters on the river, she felt solid and surefooted.

Her comfort side is immediately noticeable when entering the saloon. Port and starboard settees offer a sensible seating pattern and benefit from large side windows. You can sit at either settee and see out. Better yet, Sea Ray incorporated a forward windshield that benefits both the saloon and forward galley area. The interior is tastefully outfitted with Ultraleather and cherry. A natural maple interior is also offered.

The well-equipped galley is placed out of the saloon. I’m a fan of this type of arrangement, since it keeps the mess often associated with a little onboard cooking away from the “living area. Sea Ray ‘s designers did a nice job of ensuring the breakfast bar is low, so the cook is still part of the saloon conversation. A bonus area is the utility room under the steps that can easily absorb the optional combination washer/dryer. Sea Ray ensures every corner of space is utilized for stowage, resulting in a galley that rivals those aboard many 50-foot yachts.

The forward head is accessible from the passageway and forward cabin. This seems so basic, but recently I’ve noticed that more and more boats, larger than the 390, funnel their weary-eyed, matted-hair guests through the main cabin each morning as they make their way to the guest head.

The guest stateroom layout also works well, accommodating a small family or a boatload of weekend guests. The starboard berth converts to a full berth, and a twin berth is to port. Again, stowage is everywhere, and touches such as a full-length hanging locker and optional TV/VCR/stereo combination create a comfortable place to steal away. An overhead hatch provides light and a fresh breeze.

The master stateroom enjoys a nice separation from the forward accommodations and can be sealed off from the saloon with a door. The queen berth rivals many shoreside beds with an innerspring mattress and plenty of stowage below accessed via gas-assisted actuators. The MSD compartment and shower are separated by a vanity. This makes the best use of the space. An escape hatch abaft the berth and four opening ports bring in light. Both captain and mate will have plenty of room to hang clothes, thanks to two hanging lockers.

The engineroom has easy-to-service systems and neat and tidy workmanship. Wiring runs are clean and benefit from color-coded labeling. The engines and generator have a dedicated starting battery, and there are two house batteries also in place.

After making a long inspection of the 390, it’s easy to see why so many yachting enthusiasts flock to the Sea Ray family, and why those who head out on their own often look to return. Perhaps they hope to recapture the good old days of yachting that drew them to the sport in the first place.

Contact: Sea Ray Boats, (800) SR-BOATS; www.searay.com .

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• General Discussion

Sea Ray 390 Motor Yacht

• Thread starter m20e
• Start date Apr 21, 2023
• Apr 21, 2023

Hi all I'm looking at a 2003 Sea Ray with twin Cummins C8.3 at 446 HP. Would this make a good loop boat? Any info on fuel burn at slow cruise speeds would be greatly appreciated.  

manteomike2

We have a 2005 Sea Ray 390 Motor Yacht with the same engines and just completed the Great Loop on 4/13/23. For us, it was the perfect boat, lots of room, fast when you want, and reasonable fuel economy at trawler speeds. At 1000 rpm we burn 3.4 gph and travel at 8.6 mph. Like most loopers, we traveled at trawler speeds 90+% of the time. I was surprised to learn that Sea Ray's are the 2nd most popular loop boats according to the AGLCA. Thanks, Mike  

• Apr 24, 2023

Here is a link to the Sea Ray and a Mainship I'm looking at. As you can see there is a large difference in price. The Mainship broker says I'm paying for the Sea Ray name. I want to use the boat on the loop and then along the east coast. I do have mild mobility issues caused by many back surgeries. Any thoughts on this? Thanks https://www.pendergrassyachts.com/b...-bridge-indian-harbour-beach-florida-8766620/ https://www.world-class-yachts.com/...-390-motor-yacht-punta-gorda-florida-8797899/  

The Sea Ray is higher priced because it is a bigger newer boat with vastly superior engines. But, if your lingering back issues don’t allow you to lift hatches and service/repair things then neither will work. Boats are hands on agility tests every day you’re on it.  

Senior Member

If you have mobility issues, you will soon learn to hate the SeaRay. I have an aft cabin MY and it is a constant issue of up and down stairs. Docking the Mainship will be easier with a cockpit.  

I like the Mainship for getting around. I believe the Mainship is owned by one of their brokers.  

You might want to the Sea Ray yacht reviews by David Pascoe https://yachtsurvey.com/boatreviews/indexboatreview.htm I'm not sure why Sea Ray's are considered better than Mainship other than Sea Ray is a marketing powerhouse and Mainship is defunct. Searays are not without issues, some serious. I'm sure I'll piss off their supporters but there doesn't seem to be much reason to consider Sea Ray as anything more than average, on quality or sea keeping, they're certainly not a premium yacht other than in Sea Ray's advertising. As to Mainship you might look at his review on those as well. While he's not comparing A to B my impression was the Mainship is probably better overall than Sea Ray. Of course it always depends on model/condition of the individual boat. There are a number of really good quality yachts out there including Grand Banks, Hatteras, Tiara, Tollycraft, and others. I learned from an aquaintance who is professional skipper/surveyor delivering boats up/down the West Coast that these guys know which boats handle the rough stuff well and which don't. As a surveyor they also see behind the glitz.  

Moderator Emeritus

I used to sell boats part time as somewhat of a hobby. We sold Chaparral and Formula boats. Our main competitor was Sea Ray. Chaparral gave us seminars on what was good and bad about each brand. Sea Ray didn’t fare as well as most people believed they would. They have a tremendous marketing department. My main gripe about Sea Ray is that given a choice between form and function they almost always went with form. But many people will disagree with me on that. Just my opinion. Now as to the two boats. I really like the Mainship for accessibility on deck. The walk through bridge is awesome. You do loose the afr cabin that the SR has. And it has Yanmar engines which are fine but not the 6CTAs. I have them in our boat, awesome engines. I am not familiar with Yanmar support, whether good or bad. The MS has V drives which can be a challenge to service the transmission and shaft log. The SR engine room looks very tight on top of the engines but maybe that is just the photos. IMO the SR is fugly. Just my opinion. The MS has nice lines. I do like a pretty boat since I have to walk up to it on the dock and I don’t want to grimace every time I look at it and feel that I have a fugly boat. Having the boat manufacturer still in business is a plus. I email Formula regularly and ask questions and they respond extremely well. I would ask for records for the 1,000 hour check, they can be expensive. If not done drop the price accordingly. I think that given the 2 boats in question I think I would go with the MS and pocket the extra money for upgrades and maintenance to bring any defects up to snuff. Then enjoy.  

ommy Only you can determine whether you can feel comfortable enough given mobility issues. To me an aft cabin style means lots of steps to maneuver everytime you move about the boat. My guess is either would work or neither one would be easy.. Last I knew there were 2 2008 MS 34HTs for sale on Marco Is Fl... one listed here on TF. IMO a MS 34HT would make a great boat for a couple with any mobility issues. Only s steps separate saloon from fwd cabin, head & galley. Helm door makes handling easy for looping / locking / docking etc. EZ, wide safe walk around very safe & easy to maneuver.  

Our last boat was an aft cabin sundeck style. My wife always complained about the number of steps. Our current boat only has steps down into the cabin and she comments regularly about liking the lack of steps. So in that regard the MS wins.  

I know the Searay quite well. Service of the engines is difficult. It’s very hard to keep clean and not destroy the salon. Also you will quickly find out you better have everything you need. Climbing out, up stairs across the aft cabin top , down stairs will exhaust you. Just changing oils and not getting the boat stained is challenging. It is a good running boat with good sight lines . Spending time on the aft deck is a boating pleasure  

• Apr 25, 2023

m20e said: Here is a link to the Sea Ray and a Mainship I'm looking at. As you can see there is a large difference in price. The Mainship broker says I'm paying for the Sea Ray name. I want to use the boat on the loop and then along the east coast. I do have mild mobility issues caused by many back surgeries. Any thoughts on this? Thanks Click to expand...

Agreed about both being chevys. (not a bad thing) Having done several deliveries of both makes, IMHO Yanmars are very good engines. Not a fan of V drives. (think packing gland, coupling access) Access to the engines is better on the MS but I don't like the generator sitting under the edge of the hatch/deck.(water will drip on it) Boarding the MS will be easier and has a bit more side deck area. (big + in a lock) The helm of the MS is very exposed and the seating will be uncomfortable after several hours on watch. The SR has a very comfy helm with A/C. (big +) The cockpit of the MS is larger. A bimini top would make it the perfect spot for cocktails at the dock. (fishing also) They are both good boats if they have been maintained. The choice comes down to comfort vs. price. SeaRay for comfort.( - points for mobility factor) MainShip for function and price. IMHO  

• Apr 28, 2023

Good Loop boat Any boat you like is a good Loop boat. That said she should be watertight and safe. She should meet the needs to lock safely and handle at slow speeds. Presuming you are looking for a short Loop there are still times you aren't wide open throttle so slow handling is important. You also may not want to skim the top of the waves all the time. That can get tiring. Fuel will probably not be your largest expense. We'll finish our 8yr Loop this yr. Remember it isn't the destination that is the adventure. Good luck.  

I’ve been on several sisterships to both models. That model Searay is an interesting design that I found unique. Very sleek exterior and nice interior. The Mainship looks like a big runabout to me and the interior just felt like a “cheap” production boat to me on the couple I’ve been on. I strongly agree that both are really kind of “Chevy’s”. However, good engine - (and all other systems!) access is almost at the top of my “must have” list. The Searay is terrible, and the Mainship is only slightly better (accessing anything on the forward end is terrible). It’s not just motors. Everything else is crammed into spaces under and behind interior surfaces, and access is limited. Unfortunately, service access was an afterthought of a lot of boats of this era. I ended up with a Mainship 390 with twin Yanmars for many years - and dealt with terrible access on multiple repairs. But, overlooking access issues, it is a good general design for a loop boat. Not wanting to open the twins vs single engine debate… but if I were buying for the loop, I’d prefer a single engine with a bow thruster. But that’s just based off of the knowledge that stuff breaks on boats. And either you have to fix it, or pay a guy the hours to do so. I’f I were only choosing between these two, I’d lean slightly towards the Mainship. The first place I look to assess how a boat has been maintained is the engine room. That Searay turned me off.  

• Apr 30, 2023

Veteran Member

I chose the 390 Lisa was set on a trawler style boat. During the two years we kicked the gunwales of trawler type boats. We looked seriously at 3 Mainships and rejected them. We loved the cockpit, the single level and the roomier engine room on Mainships in general. What we didn't like were only front staterooms, guest stateroom in close proximity, single head and in your case the bunk beds for the guest stateroom. The Mainship example you are looking at seems more comfortable than the norm. We never saw us lounging comfortably in the Mainship's salon. The 390 packs in a lot 39 feet, 2 good sized staterooms, two heads, a single unit washer/dryer but it has levels. I like the separation that the levels provide. Our staterooms and heads are at the opposite ends of the boat which is very good for guests. We have had 63 days of guests and the setup worked well. The front only stateroom often has chine slap. If you are on the hook with any water movement it is a given that you will have the slap as your boat will point into the current/wind. The Mainship kills with the engine room. There is room to move around. In the 390 there is not much. I get bruises when I go over the top to to get to the outboard side of the engines. I don't go often but I do go to inspect and it is not fun. The Cummins in the 390'w are spectacular engines. What few problems they are prone to have are resolved by 1,000 hours. The problems will have manifested by then or not at all. The only other problem I've heard of is the Diesel Smartcraft. They are good until they are not. Then the issue is they are no longer manufactured. SeaRay has a number of expensive features that are not sexy so few people talk about them. One is the factory installed isolating transformer. You will never have to worry about bad dock power, ever. You will always connect with new towers that can give old boats fits. Factory installed 24 volt bow thrusters. I have a factory installed oil change system. Everytime I turn around I'm impressed with some other thoughtful factory touch. As to handling, the 390 is not precise. It has a poor A-B ratio. That helps it go fast but it does nothing for the handling and it hurts the slow speed handling. That combined with the tiny rudders make for a busy drive at no wake speeds. Contact me if you want to know more. I don't want to bore the rest of the forum, it has been a great boat. Mike  

Pete Meisinger

You did not specify the length of the boat. Length is generally a more important consideration than engine hp in determining Loop suitablity. pete  

• May 1, 2023

Pete Meisinger said: You did not specify the length of the boat. Length is generally a more important consideration than engine hp in determining Loop suitablity. pete Click to expand...

North Baltic sea

bumpkin said: Lisa was set on a trawler style boat. During the two years we kicked the gunwales of trawler type boats. We looked seriously at 3 Mainships and rejected them. We loved the cockpit, the single level and the roomier engine room on Mainships in general. What we didn't like were only front staterooms, guest stateroom in close proximity, single head and in your case the bunk beds for the guest stateroom. The Mainship example you are looking at seems more comfortable than the norm. We never saw us lounging comfortably in the Mainship's salon. The 390 packs in a lot 39 feet, 2 good sized staterooms, two heads, a single unit washer/dryer but it has levels. I like the separation that the levels provide. Our staterooms and heads are at the opposite ends of the boat which is very good for guests. We have had 63 days of guests and the setup worked well. The front only stateroom often has chine slap. If you are on the hook with any water movement it is a given that you will have the slap as your boat will point into the current/wind. The Mainship kills with the engine room. There is room to move around. In the 390 there is not much. I get bruises when I go over the top to to get to the outboard side of the engines. I don't go often but I do go to inspect and it is not fun. The Cummins in the 390'w are spectacular engines. What few problems they are prone to have are resolved by 1,000 hours. The problems will have manifested by then or not at all. The only other problem I've heard of is the Diesel Smartcraft. They are good until they are not. Then the issue is they are no longer manufactured. SeaRay has a number of expensive features that are not sexy so few people talk about them. One is the factory installed isolating transformer. You will never have to worry about bad dock power, ever. You will always connect with new towers that can give old boats fits. Factory installed 24 volt bow thrusters. I have a factory installed oil change system. Everytime I turn around I'm impressed with some other thoughtful factory touch. As to handling, the 390 is not precise. It has a poor A-B ratio. That helps it go fast but it does nothing for the handling and it hurts the slow speed handling. That combined with the tiny rudders make for a busy drive at no wake speeds. Contact me if you want to know more. I don't want to bore the rest of the forum, it has been a great boat. Mike Click to expand...

• May 29, 2023

I have tentatively settled on a 2005 SeaRay 390 Motoryacht with Cummins 480CE engines. The boat will be finishing the Loop around the second week of June in Mamaroneck, NY.. Any suggestion on who to do the survey? I have a price of $1650 from Sound Shore Marina. I have asked what this entails but haven't received a reply. The marina where the boat is based suggested Alcus Marine Technical. I have left a message but haven't heard back. I'll ask the seller for a copy of the last survey. Thanks for all the help and wisdom  

• May 30, 2023

Sea Ray 390 I'd be leary of the marina doing a survey. Both SAMS & NAMS have a web site that will list the members, all accredited, who could do the survey. Also, if you are going for a loan the lender might look more favorably on an accredited surveyor from a national organization, same for an insurance company. Good luck.  

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2004 Sea Ray 390 Motor Yacht Technical Specs

General data about sea ray 390 motor yacht.

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Sea ray 390 motor yacht.

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• Motor Yacht

2005 Sea Ray 390 Motor Yacht

• Wiiliamsburg, VA, US

Yacht price :

Specifications

Descriptions.

This beautiful Sea Ray 390 Motor Yacht has all the popular options including the Mercruiser T8.1 HO (330 hours), full Raymarine C120 Radar/GPS/Chartplotter, Raymarine ST7001 Auto Pilot, SmartCraft, Vetus bow thruster, factory hard-top w/doors, helm/aft deck AC/HT & new fridge, windlass, spotlight w/remote, vacuflush heads, central vacuum system, and professionally maintained.

Used in freshwater until 2018, original owners,  bottom paint and zincs 2019. 

Basic Information

Dimensions & weight, tank capacities, accommodations.

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The Sea Ray 390 Motor Yacht is one of the best layouts for enjoying being on the water or in the marina.

The helm with a double helm seat has excellent visibility and the spacious aft deck with lots of seating, wet bar with fridge all only few steps away. There's no forward canvas to fool with, and clear doors to the side decks with high SS rails all the way forward to the anchor/windlass and back. Access from the aft deck to the swim platform and swim ladder is down a few steps with sturdy handrail - secure and safe. This is a well-designed motor yacht for having fun on the water whether entertaining a crowd or enjoying a romantic evening under the stars.

Entering the salon from the helm through a solid cabin door and down a few steps you enter into an open and airy space with lots of beautiful wood trim and cabinets, luxurious plush seating, and stunning blend of beautiful fabrics, surrounded by large windows for great natural light and broad views.   Forward and a few steps down is an almost as beautiful fully equipped galley with lots of natural lighting and storage, and a beautiful rich hardwood floor. Effortlessly lift the steps with the gas assist struts and the washer/dryer combo is conveniently right there ready to handle a load of beach towels and t-shirts. The forward cabin has a double bunk arrangement with one bunk being a double. Across form the galley is a large full sized head equipped with a well-lit vanity and sink, vaccuflush, and a separate shower enclosure.

Saving the best for last is the full beam master aft cabin is accessed from the back of the salon through a solid hardwood door for privacy. The beautiful custom cherry built in furniture is gorgeous while being very functional. A large island bed with night stands on both sides, with luxurious fabrics, more wood trim, and large window. Add the ensuite separate head and shower compartments and you have your own private oasis. 

Sea Ray promo –

“This majestic 390 Motor Yacht is a timeless classic, built with the legendary Sea Ray commitment to quality and style. Powered by twin 8.1 S Horizon Mercruiser inboards with SmartCraft Diagnostics, this fully equipped craft features custom thru-bolted stainless steel cleats, satin nickel-finish knobs and switch plates and standard Raymarine electronics. Optional features include DSS satellite TV system, cockpit air conditioning and compact washer/dryer.”

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1990 Sea Ray 390 Express Cruiser

1990 sea ray 390 express cruiser specs.

• Boat Type : Inboard Boats
• Quantity: 2
• Horse Power: 375
• Type: Diesel
• Hull Material : Fiberglass
• Beam : 13'11"
• Length : 39'
• Net Weight : 16400 lbs
• Max Draft : 2.33 ft
• Deadrise Degrees : 19
• FreshWater Capacity : 100 gals
• Holding Tank Capacity : 30 gals
• Fuel Capacity : 150 gals
• Looking for the Boat Manual? 1990 Sea Ray Boats 390 Express Cruiser Request Boat Manual Now

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• General Discussion

Fuel consumption

• Thread starter Boat_of_Us
• Start date Jun 26, 2011

• Jun 26, 2011

I have a 360 sundancer with twin 8.1s. My rpms and speed are right on line with specs. My fuel consumption is almost 40% more than it should be. Any ideas? I should burn 32gal/hr and i am in the low 40's. Other than buying shares in Shell, any thoughts?  

Active Member

My buddy has a 360 loaded up for weekend crusing.....he gets what you are. We end up putting alot of weight on our boats.....  

What RPM are you running at. At 3500RPM I burn slightly more than that, 35gph - total.  

• Jun 27, 2011

At 3500 I am running at 25.5 mph, which is pretty close to spec, but I am burning 44 gph. I should be burning mid to low 30's. When I run at wide open throttle, I am only topping out at 4250 rpm. One guy has suggested its my props but I disagree. My speed and rpm are bang on. I was hoping someone had the same problem and it was a coil or spark plug problem.  

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