SLX 400 Outboard

Introducing the SLX 400 OB, "The Entertainer", an outboard variant of the Innovation Award-winning SLX 400, with massive capacity, deluxe amenities, breakthrough design and incredible versatility - for the total freedom to design your own adventure. From the ingenious fold-down swim terrace, to the robust cabin, to the amenity-rich cockpit, the SLX 400 OB is the consummate entertainer and a superior all-around performer - and the epitome of Orchestrated Excellence.

SLX 400 Outboard swim terrace lifestyle deployed
SLX 400 Outboard cockpit seating TV


An expansive cockpit social zone has a well-appointed wet bar with refrigerator, sink and available dual grills while the innovative fold-down swim terrace opens to extend the cockpit all the way to the water.

SLX 400 Outboard cockpit helm joystick


Innovations, found throughout, include Joystick Piloting and Dual Digital Dash w/ standard 16” Simrad Touchscreen displays.

SLX 400 Outboard cockpit helm dash
SLX 400 Outboard starboard stern three quarter family friends dock
SLX 400 Outboard running bow aerial


Bring your friends... all of them. The SLX 400 Outboard has a generous cabin and expansive bow and cockpit seating. All of this and amenities for entertainment means hours and days of fun aboard this award-winning boat. 


Fathom™ e-power

A first-of-its-kind boat electrification system, Fathom e-Power will replace a generator and includes a Mastervolt® lithium-ion battery pack, consisting of four high-capacity marinized batteries. With intuitive power management, the Fathom e-Power system is capable of powering your boat’s accessory systems for approximately eight hours* without needing recharging from shorepower or your alternators. Using the sophisticated yet easy-to-operate user interface, you can monitor power consumption and charge levels. Fathom e-Power provides a convenient way to enjoy all the features of your boat for a longer, quieter and more eco-friendly day on the water.


* Based on a fully charged system and typical power loads. Battery life will vary based on overall energy consumption. 
The Fathom system is available with 300hp Mercury® Verado® or 450hp Mercury® Racing outboard engine selections.
SLX 400 Outboard dash Fathom Screen

Experience the Power of the SLX-R

A groundbreaking package- the SLX-R features cutting-edge technology paired with high-performance propulsion and the orchestrated excellence of the SLX 400.  Powerful racing engines, combined with elevated design elements will turn heads every time you are on the water. 


Triple Mercury Racing 450R outboard engines

Mercury's Joystick Piloting for Outboards

Shadow metallic gel paint w/red boot stripe

Black painted hardtop

Superior quality upholstery w/contrast stitching

Red accent and underwater lighting

Carbon fiber accents


The connected technology on the SLX 400 provides peace of mind by effortlessly conveying a boat’s location and status of vital systems to users through the Sea Ray+ mobile app. Boaters can remotely view geofencing, engine data and alerts. Boats on shorepower can also monitor battery and bilge data so you know your boat will be ready to go when you are. 

  • Standard Propulsion
  • Triple Mercury® 300 Verado® V8 Outboards with Joystick Piloting & e-Steering (Tri-300 hp / 224 kW) – black
  • Fuel Capacity
  • 375 gal / 1,420 L
  • Length
  • 42'2" / 12.85 m
  • Beam
  • 12' 1" / 3.68 m
  • Water Capacity
  • 50 gal / 189 L
  • Capacity
  • Yacht Certified
  • Overnight
  • Yes
  • Weight
  • 20,678 lb / 9,379 kg - dry weight
SLX 400 Outboard Cockpit floor plan
SLX 400 Outboard Cabin floor plan
  • Draft Outboard Down
  • 45" / 114 cm
  • Draft Outboard Up
  • 32" / 81 cm
  • Deadrise
  • 21°
3 year warranty logo

Count on Sea Ray's 3-Year Factory Warranty

One of the primary benefits of a new boat purchase is the freedom to relax, to put aside worry and focus on savoring the well-lived life on the water. Accordingly, Sea Ray is proud to offer a stellar 3-year factory warranty*. This program, Sea Ray SENTIN3L, provides 3 years of enhanced coverage on every new sport cruiser in the Sea Ray lineup. The end result? Exceptional peace of mind.


Sea Ray SENTIN3L* applies to all Sea Ray Sundancer, SLX 400, and SLX 400 Outboard models and features three-year, bow-to-stern factory warranty on the boat and its components** from defects in materials and workmanship.  Finally, beyond the three-year bow-to-stern coverage, the Sundancer, SLX 400, and SLX 400 Outboard models have a 10-year Limited Structural Hull/Deck Warranty* to the Original Owner.


*Applies only to Sea Ray Sport Cruisers and SLX 400/SLX 400 Outboard models built in the USA.  See your Sea Ray dealer and the Sea Ray Express Limited Warranty for complete details.
**Applies to Sea Ray Sport Cruisers and SLX 400/SLX 400 Outboard models built in the USA or Mexico and sold in the USA or Canada. Limitations do apply. Contact engine manufacturer and Brunswick Product Protection Corporation for coverage details.


Sea Ray quality means every outing is more than a simple jaunt; it's an experience to be relished. And Sea Ray care means our award-winning dealer network and industry-leading warranty programs have your back.

Request a quote

The moments spent daydreaming about getting out on the water have never been closer to reality. Sea Ray craftsmanship ensures your boat will perform for years and years to come. Sea Ray quality means every outing is more than a simple jaunt; it's an experience to be relished. And Sea Ray care means our award-winning dealer network and industry-leading warranty programs have your back. Find out how to make the Sea Ray life a part of yours.


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