Dehler Duetta 86 Buyer's Guide
Shopping the brokerage market for a Dehler Duetta 86 means weighing a small, wide-sterned Van de Stadt-designed cruiser built from 1977 to 1984 in meaningful numbers against a known cluster of moisture and trim vulnerabilities. The boat's three interior versions and luxury 'S' suffix create real variety afloat, but the same construction choices that made it light and roomy also dictate where a survey must focus.
Layouts on the Used Market
The Duetta 86 came in 'L', 'G', and 'A' versions, and the used fleet reflects that split. The 'L' shows a double berth under the foredeck with an L-shaped galley saloon and a cockpit to the transom. The 'G' trades the foredeck berth for interior lockers and a deck-accessed sail locker plus dog bunks. The 'A' slides the cockpit forward, adds a separate aft cabin with two singles, and lowers its saloon table into a large sunbathing platform. The 'S' suffix on any of these means more luxurious equipment — teak rubbing strake, teak in the cockpit, Treadmaster deck covering, and a gas cooker. Berths are sufficiently large and the saloon seats four around a rotating table; the WC room is very small on every layout.
Equipment and Common Upgrades
On the used market a Duetta 86 will commonly be fitted with a chartplotter, a self-tacking jib, and an autopilot. Heating is often seen. The 'A' version's hydraulic wheel and forward-sliding cockpit are original rather than upgrades, as is the variable sail plan. Engines in the fleet range from the robust Yanmar 2GM20 to alternative Farymann installations, with old single-circuit cooled units frequently at end of life. Where the teak rubbing strake has worn, plastic replacement is now the typical remedy rather than a period-correct teak refit.
What to Inspect
Documentation flags several areas a buyer should treat as red lines. Moisture must never have reached the balsa core, and hairline gelcoat cracks at the starboard dunnage have let laminate swell on the test boat. The mast base holds a wooden core damaged by leaking electrical plugs, and the self-turning rail ends show the same wood-swell-and-laminate-destroy path. Cockpit drainage relies on copper standpipes above the waterline with no sea valves, and the hull connection's durability is questionable; there are no seacocks on the cockpit drains. Rudder bearings wear and betray themselves by blade slap under engine power, while hatch rubbers, windows, and hatch seals age and leak. ABS deep-drawn parts — inner shell, washbasin, hatch garage — are no longer available and cannot be repaired, only rebuilt in GRP, and the original gas cooker has no replacement. The gelcoat chalks and the Treadmaster covering is labour-intensive if it loosens.
Availability and Buyer's Takeaway
Typical markets for the Duetta 86 are the Netherlands, Germany, Switzerland, Denmark, Italy, and the United Kingdom. For a buyer, the checklist is short but non-negotiable: confirm the balsa deck core is dry, trace the mast-base and rail-end wood for moisture damage, verify cockpit drain bonds and absence of seacocks, test rudder bearings for slap, and budget for ABS-part rebuilds and gelcoat repaint. A sound example rewards with a good-natured, protected cockpit cruiser and a spare-parts contact at the Großenbrode marina.
Price & volume trends
Monthly asking-price and listing-volume trends for the Dehler Duetta 86. The line shows the median ask each month; the bars show how many listings appeared.
Monthly breakdown · 7 rows
| Month | Listings | Median ask | Δ vs. last mo. |
|---|---|---|---|
| Sep 25 | 3 | $ 18,884 | — |
| Jan 26 | 1 | $ 15,909 | -15.8% |
| Feb 26 | 3 | $ 9,906 | -37.7% |
| Apr 26 | 1 | $ 13,734 | +38.6% |
| May 26 | 3 | $ 13,734 | 0.0% |
| Jun 26 | 1 | $ 7,439 | -45.8% |
| Jul 26 | 1 | $ 11,388 | +53.1% |
Where they're listed
Dehler Duetta 86 listings appear across 5 countries. Netherlands has the most listings with 6 (46.2%), followed by Germany and Switzerland.
Country view
13 listings · 5 countries| Country | Median ask | Listings · 12 mo | Active · 90 d | Share |
|---|---|---|---|---|
| Netherlands | $ 12,561 | 6 | 3 | 46.2% |
| Germany | $ 7,897 | 3 | 1 | 23.1% |
| Switzerland | $ 23,464 | 2 | 0 | 15.4% |
| United Kingdom | $ 16,086 | 1 | 1 | 7.7% |
| Italy | $ 18,884 | 1 | 0 | 7.7% |
Comparable models
Similar length, displacement, and era. Open a row to compare that model's market page.
Similar boats to compare
5 similar designs| Model | LOA | Median ask | Listings · 12 mo | Active · 90 d |
|---|---|---|---|---|
| Dehler 31 | 30.84' | $ 26,806 | 42 | 11 |
| Dehler 35 Cws | 34.45' | $ 68,191 | 28 | 4 |
| Dehler 28 | 27.89' | $ 26,765 | 20 | 10 |
| Dehler Duetta 86You are here | — | $ 13,688 | 13 | 5 |
| Dehler Optima 92 | 30.18' | $ 18,265 | 13 | 6 |
