Mariner 31 Buyer's Guide
The Mariner 31 is a ketch-rigged fiberglass cruiser from Far East Yachts, designed by Clair Oberly and first built in 1968. For a shopper on the used market, she presents as a heavy-displacement voyager of just over 30 feet, with a long full keel, an Atomic 4 gasoline engine, and a sail plan that matches the average for comparable boats. What follows is a guide to the layouts, equipment, and inspection points that matter when evaluating a specific hull.
Layouts on the Used Market
A buyer should expect the as-built 30.67-foot hull with a 9.75-foot beam and the original accommodation volume that the 11,500-pound displacement provides. View any example as a single-generation design without sub-models to compare. The cabin footprint follows from the 25.5-foot waterline and solid fiberglass construction rather than a redesigned deck mold.
Equipment and Common Upgrades
A buyer should verify the presence and condition of the Universal Atomic 4 engine, the 38-gallon gasoline capacity, and the 40-gallon water tank as baseline equipment. Confirm the ketch rig's halyards run about 24 meters with 10 mm diameter and sheets use 12 mm line, since worn running rigging is a common owner-replaced item on a 1968-vintage boat.
What to Inspect
The Mariner 31 has a fiberglass hull integrity that should be checked for osmotic blistering and stress cracks at the long-keel joint. A buyer should also confirm the Atomic 4 installation and cooling system as they would on any gasoline-powered cruiser of this vintage, and inspect the mast step and chainplate beds for movement.
Availability and Buyer's Takeaway
Regional availability is not characterized by area for this model.
- Confirm hull is solid fiberglass with no osmosis signs
- Check long full keel for grounding damage
- Verify Atomic 4 starts and cools properly
- Inspect ketch rig halyards for 24 m length and 10 mm wear
- Test 38 gal fuel and 40 gal water tanks for leaks
Price & volume trends
Monthly asking-price and listing-volume trends for the Mariner 31. The line shows the median ask each month; the bars show how many listings appeared.
Comparable models
Similar length, displacement, and era. Open a row to compare that model's market page.
Similar boats to compare
2 similar designs| Model | LOA | Median ask | Listings · 12 mo | Active · 90 d |
|---|---|---|---|---|
| Gozzard 31 | 36.17' | $ 69,450 | 12 | 1 |
| Rustler 31 | 31.42' | $ 17,223 | 10 | 0 |