August 20, 2026
Sea Ray SLX 310 Outboard: Same Number, Different Boat
Sea Ray builds two boats called SLX 310, and the outboard is the longer, lighter, faster one: 33'10" against 31'6", 10,335 lb dry against 11…
Read the articleSea Ray SLX 310 Outboard
Expert Review, Technical Specifications & Market Analysis
The Essentials
| Feature | Specifications |
|---|---|
| Overall Length | 33'10" |
| Beam | 10'3" |
| Draft | 32" trim down / 25" trim up |
| Displacement | 10,335 lbs |
| Engines | Twin Mercury 300 Verado Outboards (2 x 300 HP) |
| Fuel Capacity | 158 gal |
| Water Capacity | 24 gal |
| Cabins / Heads | 0 Cabins / 1 Head |
| Max Speed | 54-61 mph (Sea Ray published wide-open throttle) |
| Cruise Speed | 33-39 mph (Sea Ray published cruising speed) |
Source: Spec & Photos courtesy of Sea Ray. Specs verified by Tony Smith, USCG 100 Ton Master, on August 20, 2026.
Part of the Sea Ray SLX series — see how owners step up through the lineup.
Quick Verdict
- Not a variant, a different boat: 33'10" against the sterndrive SLX 310's 31'6", 10,335 lb dry against 11,252, 158 gallons against 130. Only the 10'3" beam and the 24/20 gal tankage are shared
- Sea Ray publishes cruise, wide-open throttle and range for this hull — 33-39 mph, 54-61 mph, 187 miles at cruise — where it publishes only a WOT band and no range at all for the sterndrive
- Twin Mercury 300 Verado outboards with Joystick Piloting are standard, and the option list runs to twin 350 and twin 400 Verado V10s. Sea Ray publishes no performance figures for either upgrade, so treat the 54-61 mph as the standard boat's number
- Nothing under the cockpit sole: no drives, no bellows, no gimbal bearings, and a mechanic who never has to reach past a stringer. That is the ownership case for this version
- The trade is the transom. Two cowlings and a bracket occupy the space the sterndrive gives to a full-width swim platform, and you are berthing 2'4" more boat for the same 10'3" of beam
- Five-year SURPA5S+ bow-to-stern cover plus a Limited Lifetime Structural Hull/Deck Warranty to the original owner
Our Take
The first thing to get straight is that this is not the sterndrive SLX 310 with different engines on the back. Sea Ray builds two boats and gives them the same number. This one is 33'10" where that one is 31'6", it is 917 pounds lighter dry, and it carries 158 gallons against 130. If you have been reading specs off one page and shopping the other, start again.
Once you accept it is a separate boat, the case for it is easy to make. Standard power is twin 300 Verados with Joystick Piloting already fitted, and the option list goes to twin 350s and twin 400s if you want it. Sea Ray publishes a 33 to 39 mph cruise, 54 to 61 wide open, and 187 miles of range — and I want to point out that the sterndrive page publishes no cruise and no range whatsoever. Same builder, same model number, and one of these two boats hands you the numbers while the other makes you find them on the water. That is worth something when you are trying to plan a season rather than a demo ride.
The real reason people choose this one, though, is what is not under the cockpit sole. No drives, no bellows, no gimbal bearings, nothing that needs a haul-out to inspect. In salt water that removes an entire category of annual worry. What you give up is the transom — the sterndrive's full-width swim platform is genuinely better if your day ends with four people in the water, and you are paying slip fees on 2'4" more length for the same 10'3" of beam, which means the extra footage is aft of where you actually sit. Go stand in both cockpits before you decide which of those two things you care about more. It is a preference, not a right answer, and anyone who tells you otherwise is selling you the one they have in stock.
Official Sea Ray Premiere: Inside the Sea Ray SLX 310 Outboard
Video courtesy of Sea Ray.
Sea Ray SLX 310 Outboard Photo Gallery
Photos courtesy of Sea Ray.
Sea Ray SLX 310 Outboard Articles & Guides
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Frequently Asked Questions
Should I buy the sterndrive SLX 310 or the SLX 310 Outboard?
It depends on which end of the boat matters more to you. The outboard version removes a whole category of annual inspection — no drives, no bellows, no gimbal bearings — and routine service happens under a cowling at standing height rather than through a hatch. In salt water that is the strongest argument for it.
The sterndrive keeps the transom clear, which buys a full-width swim platform and a ladder reachable from anywhere along it. You are also berthing 2 feet 4 inches more boat for the same 10'3" beam, and that extra length sits aft of where you actually sit. Stand in both cockpits before you decide.
Is the Sea Ray SLX 310 Outboard the same boat as the SLX 310?
No. Sea Ray builds two different boats and gives them the same model number. The outboard is 33'10" against the sterndrive's 31'6", 10,335 pounds dry against 11,252, and carries 158 gallons of fuel against 130. Draft is 32 inches trimmed down and 25 up, where the sterndrive is 38 and 28.
The only figures the two genuinely share are the 10'3" beam and the 24-gallon water and 20-gallon holding tanks. If you have been reading specifications off one page while shopping the other, start again.
Do the published speeds apply to the SLX 310 Outboard's 350 and 400 Verado options?
No. Sea Ray's 33 to 39 mph cruise, 54 to 61 mph wide-open band and 187-mile range belong to the standard twin Mercury 300 Verado package only.
The option list runs to twin Mercury 350 Verado V10s and twin Mercury 400 Verado V10s, both with Joystick Piloting, and Sea Ray publishes no speed, cruise or range figure for either. If a listing quotes a faster number for a 350- or 400-powered boat, it did not come from the builder — get it demonstrated on the water instead.
How fast is the Sea Ray SLX 310 Outboard, and how far will it go?
Sea Ray publishes 33 to 39 mph cruising, 54 to 61 mph wide open, and 187 miles of range at cruise with 117 at wide-open throttle, from 158 gallons. Those figures belong to the standard twin Mercury 300 Verado package.
Worth noting alongside them: the sterndrive SLX 310 publishes only a 44 to 50 mph wide-open band, with no cruising speed and no range at all. Same builder, same model number, and one of the two boats hands you the numbers while the other makes you find them on the water.