Sea Ray 310 SLX OB
The Sea Ray 310 SLX OB is a 31-foot boat, with model years from 2017 to 2025 in the listings we track. Across 29 listings we have observed (model years 2017–2025), the median asking price is $274,000, with most boats asking $250,000 to $299,000. The engine we see most often on this model is Mercury Verado / V8 FourStroke (250–400).
BoatVerdict market snapshot
These are asking prices. No free or public source publishes US used-boat transaction prices, so nobody — us included — can honestly show you what these boats sold for. What we can show you is what 29 sellers are asking, which is the number you are actually negotiating against.
18 priced listings across 5 states. Enough for a range, not enough to be precise about any single year.
Method: Asking prices from active listings, de-duplicated so a re-posted boat counts once (29 raw listings collapsed to 29 distinct boats). Quartiles, not averages, so one outlier cannot move the band. Rounded to $500.
Coverage: Model years 2017–2025, 5 states, 6 metro areas. New-boat listings excluded.
Sources: BoatVerdict market observations (rightboat + marinemax) · US state vessel registries (21,168 registered Sea Ray hulls)
Looking at a Sea Ray 310 SLX OB for sale?
Paste the listing and we will score that specific boat against everything on this page: asking price versus our observed range, engine and hours risk, the known issues for its model year, and a negotiation position. The verdict is free.
Get the free verdict →No account needed. The paid Deal Report is optional and comes after.
The BoatVerdict take
- BoatVerdict listing data
Pricing is tight: the middle half of listings sits between $250,000 and $299,000, only a 1.2x spread. A boat asking well outside that band needs a reason, and "it is loaded" is usually not enough of one.
- BoatVerdict listing data
Supply is concentrated: our 29 listings came from only 5 states, led by FL. Expect a smaller buyer pool at resale, and budget for transport if the right boat is not local.
- Recall (USCG/CPSC)
35 federal recall campaigns on file touch this builder. Check the specific hull against the recall list below before you put money down; remedies are free but only if the work was actually done.
Each point is tagged with the evidence behind it. Nothing here is a claim we cannot trace back to a counted listing, a federal record, or a named analyst judgement.
Sea Ray 310 SLX OB prices by model year
Show the numbers by model year
| Model year | Boats | Middle half of asks | Median ask |
|---|---|---|---|
| 2025 | 2 | too few to show | - |
| 2023 | 4 | $270,500 to $283,000 | $277,000 |
| 2021 | 1 | too few to show | - |
| 2020 | 1 | too few to show | - |
8 distinct boats, listed now or since taken down, re-posts counted once. Years with fewer than 3 boats show a count only. Asking prices, not sale prices.
What a used Sea Ray 310 SLX OB is worth
We have seen 8 distinct Sea Ray 310 SLX OB boats for sale between Nov 13, 2026 and Nov 14, 2026, model years 2020 to 2025, in 5 states. The median ask is $277,000 and half of all asks sit between $257,500 and $309,500.
Engines: median 300 hp across 5 boats that stated it (most common: 300 hp, 350 hp). Engine brands named: Mercury 5. Median engine hours on the 4 boats that stated them: 186.
Recent Sea Ray 310 SLX OB asking prices
| Year | Model | Length | HP | Hours | State | Asking | Seen | Status |
|---|---|---|---|---|---|---|---|---|
| 2021 | 310 SLX OB | - | - | - | NY | $250,000 | Nov 13, 2026 to Nov 14, 2026 | listed MarineMax |
| 2023 | 310 SLX OB | - | - | 85 | NJ | $259,999 | Nov 13, 2026 to Nov 14, 2026 | listed MarineMax |
| 2025 | 310 SLX OB | - | 350 | - | FL | $359,900 | Nov 13, 2026 to Nov 14, 2026 | listed MarineMax |
| 2023 | 310 SLX OB | - | 300 | 226 | MD | $274,000 | Nov 13, 2026 to Nov 14, 2026 | listed MarineMax |
| 2020 | 310 SLX OB | 31 ft | 300 | 345 | CT | $225,995 | Nov 13, 2026 to Nov 14, 2026 | listed MarineMax |
| 2023 | 310 SLX OB | - | 350 | 145 | FL | $279,900 | Nov 13, 2026 to Nov 14, 2026 | listed MarineMax |
| 2025 | 310 SLX OB | - | - | - | NY | $374,795 | Nov 13, 2026 to Nov 14, 2026 | listed MarineMax |
| 2023 | 310 SLX OB | 31 ft | 300 | - | FL | $292,425 | Nov 13, 2026 to Nov 14, 2026 | listed MarineMax |
The 8 most recently seen of 8 distinct boats. These are asking prices, not sale prices: no free source publishes US used-boat sale prices. A boat re-posted several times counts once, at its latest ask. "Taken down" means the ad disappeared; that can be a sale, a seller who gave up, or an expired post.
Sea Ray recalls and accident record
Of 4,338Sea Ray boats in USCG accident records: fire or explosion 6%, flooding or swamping 6%, capsizing 1%, total loss 6%, at least one death 4%. The rate counts accidents in Texas and New York waters from 2014 to 2023 (174) against 21,153 Sea Ray boats registered in those two states, the only states that publish boat-level registrations. Accident records reflect how and how much boats are used, not only how they are built. Only accidents above the USCG reporting threshold are recorded. Personal watercraft are left out.
These numbers are for the builder, not this model. Check the specific hull with a HIN lookup for recalls and reported accidents.
Recalls affecting Sea Ray
35 federal recall campaigns on file. Recalls are issued against hull-identification ranges, so a campaign listed here may or may not cover the specific boat you are looking at — check the HIN. Remedies are free from the builder, but only if the work was actually performed, and there is no central database that proves it was.
- ⚠ Recall
150018S9/9/2015VENTILATION
- ⚠ Recall
940233T9/2/1994NON IGN PROTECTED DEVICE
- ⚠ Recall
940234T9/2/1994NON IGN PROTECTED DEVICE
- ⚠ Recall
920416T8/27/1992FUEL LEAKAGE
- ⚠ Recall
970080T7/7/1997FUEL LINE ABRASION - LEAK
- ⚠ Recall
010089S7/30/2001OVERCURRENT PROTECTION; ELECTRICAL SYSTEM
- ⚠ Recall
180012S7/27/2018FUEL SYSTEM
- ⚠ Recall
24MF02396/7/2024 - ⚠ Recall
160005S6/6/2016 - ⚠ Recall
190039T6/28/2019STEERING
- ⚠ Recall
190038T6/26/2019ELECTRICAL SYSTEM
- ⚠ Recall
040070S6/17/2004labEL; BLOWER WARNING
Method: Matched to the builder by normalized company name and MIC. A campaign is shown when it touches this builder; the model and year columns say how narrowly it applies.
Sources: US Coast Guard recall database · CPSC recalls
Engines we actually see on the 310 SLX OB
- Mercury Verado / V8 FourStroke (250–400)
Modern Mercury V8/V10 FourStroke and supercharged Verado are strong, smooth, and well-supported, a clear step up from the OptiMax era. Slightly behind Yamaha on resale trust but closing fast, and often better integrated (joystick, digital throttle).
Service reality: 100-hour service; supercharged Verado adds the supercharger oil interval. Check for corroded battery cables and the SmartCraft harness on saltwater boats.
Full Mercury Verado / V8 FourStroke (250–400) reliability profile →
Method: Engine family matched from the listing's engine fields and title text against BoatVerdict's engine-family profiles. Prevalence is share of our sample, not factory fitment rates.
Sources: BoatVerdict market observations · BoatVerdict engine-family profiles
Sea Ray 310 SLX OB specifications
| Length (median listed) | 31.0 ft | Our listing data |
|---|---|---|
| Model years traded | 2017–2025 | Our listing data |
| Sea Ray hulls in US registries | 21,168 | TX + NY open data |
Rows marked "our listing data" are measured from listings, not published by the builder, and will differ from a brochure. Rows without a source we can name are not shown at all.
What to inspect on a used Sea Ray 310 SLX OB
- Mercury Verado / V8 FourStroke (250–400): 100-hour service; supercharged Verado adds the supercharger oil interval. Check for corroded battery cables and the SmartCraft harness on saltwater boats. Seen on 5 of the 29 310 SLX OB listings we track (typically 300 hp on this model).
- Get the hour meter reading and divide by the boat's age. Above 150 hours a year is heavy use for a Mercury Verado / V8 FourStroke (250–400). Threshold from BoatVerdict's engine-family profile for Mercury Verado / V8 FourStroke (250–400).
- Assume saltwater service unless the seller can prove otherwise: pull the engine cowling and look at the powerhead, check trim-cylinder rams for pitting, and open the battery and fuse boxes for green corrosion. 100% of the listings we observed for this model are in coastal states.
This list is specific to this model: analyst items for the hull, plus items driven by the engines and the regions we actually observe on 310 SLX OB listings. It is not a generic pre-purchase checklist, and it does not replace a surveyor.
What a 310 SLX OB costs to own
$11k – $33k per year
- 31 ft hull, the median observed length for this model
- Saltwater berth, based on where most listings we see are located (FL)
- Includes insurance, storage, routine service, fuel at moderate seasonal use, and a reserve for wear items
- Excludes loan payments, major engine replacement, and refit work
This is a modelled band, not observed spend. Real cost swings hard on where you keep the boat and how much you use it.
Method: The same ownership-cost model BoatVerdict's paid Deal Report uses: boat class and length set the base band, then saltwater berth and size adjust it.
Sources: BoatVerdict ownership-cost model
Where 310 SLX OBs are for sale
- FL 3
- NY 2
- MD 1
- CT 1
- NJ 1
Counts of distinct boats we observed per state, from 29 listings in 6 metro areas. We publish the distribution, not the listings themselves.
What else buyers cross-shop
- Sea Ray 310 Sundancer
- Sea Ray 310 SLX
- Sea Ray Sundancer 320
- Sea Ray 300 Sundancer
- Sea Ray 320 Sundancer OB
- Sea Ray 300 Weekender
Chosen by measured similarity — same builder first, then comparable length — and limited to models whose own page meets our evidence bar. No paid placements, no filler links.
Sea Ray 310 SLX OB FAQ
How much does a used Sea Ray 310 SLX OB cost?
Are there recalls on the Sea Ray 310 SLX OB?
What engine does the Sea Ray 310 SLX OB come with?
What does it cost to own a Sea Ray 310 SLX OB per year?
Looking at a Sea Ray 310 SLX OB for sale?
Paste the listing and we will score that specific boat against everything on this page: asking price versus our observed range, engine and hours risk, the known issues for its model year, and a negotiation position. The verdict is free.
Get the free verdict →No account needed. The paid Deal Report is optional and comes after.