Dufour Classic 35
Built 1995–? by Dufour Yachts (France)
Own one? Keep her maintenance, manuals and checklists here — free for a week
Shopping? Find the right used boat
Looking at one? Sea-trial scorecard
About the Dufour Classic 35
Researched from public sources for this model. Any individual boat may have been modified or repowered — confirm before relying on any figure.
- Built
- 1995–?
- Builder
- Dufour Yachts (France)
- Designer
- J&J Design
- Length
- 35 ft
- Waterline
- 28 ft
- Beam
- 11.5 ft
- Draft
- 5.93 ft
- Displacement
- 10,000 lb
- Ballast
- 3,110 lb
- Hull / keel
- fin keel
- Rig
- sloop
- Water
- 77 gal
- Stern thruster
- not fitted
Tank capacities — where the figures come from
-
Fuel unknown
“Capacité carburant 100 L” — spec database (1995-2000), bateau.ouest-atlantis.com · “Capacité du réservoir de carburant : 100 litres” — search excerpt, xboat.frTwo French sources give 100 L (26 US gal); our earlier 32 gal (about 120 L) rested on sailboatdata. The builder brochure and spec sheet are in the Dufour Association archive, which is members-only.
-
Water 77 gal
“Capacité d'eau 300 L” — spec database (1995-2000), bateau.ouest-atlantis.com · “Capacité du réservoir d'eau : 200 litres” — search excerpt, xboat.frA French boat database gives 300 L (79 gal), close to our earlier 77; another French page says 200 L. No builder source settles it.
-
Water heater unknown
The Dufour Association's specification sheet, brochures and owner's manual for this model are for members only, so they couldn't be checked, and no other source was found.
Tanks are often replaced or added on older boats — check the tank labels or a survey for yours.
Thrusters and steering — where this comes from
-
Bow thruster unknown
The Dufour Association's specification sheet, brochures and owner's manual are open to members only, and no other source was found.
-
Stern thruster not fitted
Our earlier figure of none has no source, and nothing was found either way.
-
Steering unknown
“I have a Dufour 35 Classic 1998 She has a Whitlock Cobra wheel steering system - now Lewmar” — search excerpt (1998), cruisersforum.comOne owner of a 1998 boat reports a Whitlock Cobra wheel steerer (a geared, rack type) on a forum, but a single boat doesn't settle the type or brand. Builder documents on the Dufour Association site are for members only.
Thrusters and steering are often replaced — check the units on your boat before ordering parts.
Sources disagree on fuel tank — left blank rather than guessed.
Bulb fin with spade rudder; lead ballast; shoal draft 4.5 ft. A similar boat was sold as the Stardust 353 (charter). Drive type not confirmed. No model-specific problem sources were read.
Engines fitted
-
Volvo Penta MD2030 (saildrive) — 29 hp, diesel, single
standard
Three-cylinder diesel, rated 29 hp by Volvo; boat listings round it to 30 hp. A for-sale video notes a saildrive installation. Engine access is described as poor.Sources: listingsport.com · yachtr.com · velmundi.com · cruisersforum.com
Manuals and brochures online
- Spec sheet Dufour 35 Classic specifications, two brochures and owner's manual (members-only downloads) — dufour.org.uk
Hosted by the builder or an owners' association; they own the copyright.
Known problems for this model
No well-sourced problem reports found yet.
Engines & parts
Volvo Penta MD2010 / MD2020 / MD2030 / MD2040 parts: good
Factory standard engine — you entered “Volvo Penta MD2030 (saildrive)”
Shibaura-based small diesels (MD2030 is a 3-cylinder, 29 hp, built 1994–2006 per a Swedish rebuild shop). Parts are still sold through the Volvo Penta network and some cross-reference to related Shibaura engines; aftermarket stainless exhaust elbows (replacing Volvo 861906) are widely sold. Often paired with Volvo 120S/130S saildrives, whose rubber diaphragm seal Volvo says to replace at least every seven years.
Parts sources: AB Marine Service (exhaust elbow 861906), FYB Marine (saildrive diaphragm seal kit), Parts4Engines
Common problems (3)
-
Exhaust elbow corrosion and clogging exhaust
The cast exhaust elbow and pipe corrode or clog with seawater scale and carbon; stainless aftermarket elbows are a common fix.meksta.com · ab-marineservice.com
-
Saildrive diaphragm seal replacement running gear
Volvo's 7-year saildrive diaphragm replacement (sometimes an insurance requirement) is a frequent question; DIY is possible in a day with a haul-out, while yard quotes vary widely.forums.ybw.com · bavariayacht.org · fybmarine.shop
-
Blocked heat exchanger, broken impellers, glow plug faults cooling
Other frequent faults are internally blocked heat exchangers, disintegrating raw-water impellers, failed preheat/glow plugs and carboned injectors.meksta.com
Maker’s service schedule (20)
| Engine oil & filter change Early engines (1993 instruction book 7735333-2: MS2 reverse gear / 120S drive) | 100 hrs or 6 mo | “Service every 100 hours of operation, or at least once every 6 months” — manufacturer, sbo.sailboatowners.com |
| Engine oil & filter change Later engines (2002 operator's manual 7741986: MS10/MS15 reverse gear / MS25S drive) | 100 hrs or 1 yr | “Every 100 operating hours or at least once a year” — manufacturer, sbo.sailboatowners.com |
| Fuel filters & water separator | 200 hrs or 1 yr | “Service every 200 hours of operation, or at least once a year” — manufacturer, sbo.sailboatowners.com |
| Raw-water pump impeller | 200 hrs or 1 yr | “every 200 hours, or at least once a year:” — manufacturer, sbo.sailboatowners.com |
| Transmission fluid change | 200 hrs or 1 yr | “Service every 200 hours of operation, or at least once a year” — manufacturer, sbo.sailboatowners.com |
| Check / adjust idling speed | 200 hrs or 1 yr | “every 200 hours, or at least once a year:” — manufacturer, sbo.sailboatowners.com |
| Take apart and clean the vacuum (siphon-break) valve | 200 hrs or 1 yr | “Take apart and clean the vacuum valve, if fitted.” — manufacturer, sbo.sailboatowners.com |
| Lubricate the rubber propeller-shaft seal (shaft installations) | 200 hrs or 1 yr | “Lubricate the rubber propeller shaft seal (inboard engine).” — manufacturer, sbo.sailboatowners.com |
| Check S-drive / reverse-gear corrosion protection (zinc ring / anodes) | 200 hrs or 1 yr | “Check the S-drive’s zinc anode (zinc ring).” — manufacturer, sbo.sailboatowners.com |
| Coolant replacement & freeze-point test Glycol antifreeze mixture (the normal fill) | 400 hrs or 2 yrs | “every 400 hours, or at least once every other year:” — manufacturer, sbo.sailboatowners.com |
| Coolant replacement & freeze-point test Anti-corrosion-agent mixture without glycol (later manual) | 200 hrs or 1 yr | “If the freshwater system is filled with an anti-corrosion agent mixture it must be changed every year.” — manufacturer, sbo.sailboatowners.com |
| Air filter / intake silencer | 400 hrs or 2 yrs | “Service every 400 hours of operation, or at least once every other year” — manufacturer, sbo.sailboatowners.com |
| Heat exchanger & oil cooler cleaning | 400 hrs or 2 yrs | “Check that the heat exchanger is not blocked.” — manufacturer, sbo.sailboatowners.com |
| Injector test / service | 400 hrs or 2 yrs | “every 400 hours, or at least once every other year:” — manufacturer, sbo.sailboatowners.com |
| Valve clearance check / adjust | 400 hrs or 2 yrs | “every 400 hours, or at least once every other year:” — manufacturer, sbo.sailboatowners.com |
| Re-tighten cylinder head bolts (workshop) Early engines (1993 instruction book 7735333-2: MS2 reverse gear / 120S drive) | 400 hrs or 2 yrs | “every 400 hours, or at least once every other year:” — manufacturer, sbo.sailboatowners.com |
| Check the seawater filter Early engines (1993 instruction book 7735333-2: MS2 reverse gear / 120S drive) | 50 hrs | “Service every 50 hours of operation” — manufacturer, sbo.sailboatowners.com |
| Check the S-drive rubber seal (hull/drive) Later engines (2002 operator's manual 7741986: MS10/MS15 reverse gear / MS25S drive) | 1 yr | “S-drive. Check rubber seal (hull/drive)” — manufacturer, sbo.sailboatowners.com |
| Replace propeller-shaft seal (reverse-gear installations, workshop) | 500 hrs or 5 yrs | “Every 500 operating hours or at least every fifth year” — manufacturer, sbo.sailboatowners.com |
| Replace S-drive rubber seal between drive and hull (workshop) | 7 yrs | “Every seventh year” — manufacturer, sbo.sailboatowners.com |
Service part numbers (7)
| Oil filter MD2010 / MD2020 |
Volvo Penta 861473 | “p.90 "MD2010, MD2020, MD2030, MD2040" block: Oil filter (MD2010/2020) — 861473” — manufacturer, volvopenta.com · “# Volvo Penta MD2020B … [OIL FILTER] Part Number: 861473” — dealer, marinepartsexpress.com |
| Oil filter MD2030 / MD2040 |
Volvo Penta 3840525 | “p.90 "MD2010, MD2020, MD2030, MD2040" block: Oil filter (MD2030/2040) — 3840525” — manufacturer, volvopenta.com · “# Volvo Penta MD2030B … [OIL FILTER] Part Number: 3840525” — dealer, marinepartsexpress.com |
| Raw-water impeller MD2010 up to SN 5101203008; MD2020 up to SN 5101309052 (VP footnote 3) |
Volvo Penta 3586494 Also: Johnson 09-806B, Jabsco 4528-0001, Sherwood 9979 |
“p.90 "MD2010…MD2040" block: Impeller kit 3) — 3586494; 3) MD2010 SN -5101203008, MD2020 SN -5101309052” — manufacturer, volvopenta.com · “MD2010A**, MD2010B**, MD2010C, MD2010D / MD2020A**, MD2020B** … Volvo Penta: 875807-0 803729 3586494 876689” — dealer, poseidonmarine.eu |
| Raw-water impeller MD2030 / MD2040; MD2010 from SN 5101203009; MD2020 from SN 5101309053 (VP footnote 4) |
Volvo Penta 22222936 | “p.90 "MD2010…MD2040" block: Impeller kit (MD2030/2040) 4) — 22222936; 4) MD2010 SN 5101203009-, MD2020 SN 5101309053-” — manufacturer, volvopenta.com · “IMPELLER KIT … MD2010,MD2010B,MD2010-C,MD2010-D,MD2020,…,MD2030,…,MD2040-D” — dealer, volvopentaparts.shop |
| Thermostat MD2010 / MD2020 |
Volvo Penta 861911 | “Volvo Penta thermostat for various MD2010 and MD2020 engines … 861911” — dealer, ab-marineservice.com · “Fits engine versions MD2020-A, MD2020-B, MD2020-C, MD2020-D / Volvo thermostat part number 861911” — dealer, parts4engines.com |
| Thermostat MD2030 / MD2040 |
Volvo Penta 3580365 | “Thermostat designed to replace Volvo part numbers 3580365 … MD2030A … MD2040D” — dealer, piecesbateaux.com · “# Volvo Penta MD2030B … [THERMOSTAT] Part Number: 3580365” — dealer, marinepartsexpress.com |
| Drive belt MD2010 / MD2020 (alternator, cogged V-belt) |
Volvo Penta 973534 Replaces 966898 |
“Current part number: 973534 Previous part number: 966898 … MD2010A … MD2020-D” — dealer, marinepartsystem.com · “# Volvo Penta MD2020B … [V-BELT] Part Number: 973534” — dealer, marinepartsexpress.com |
From the engine maker’s parts lists, or two independent parts dealers. Numbers change with serial number and get superseded — check yours before ordering.
Model sources (6)
sailboatdata.com · listingsport.com · yachtr.com · velmundi.com · cruisersforum.com · bateau.ouest-atlantis.com
Own a Dufour Classic 35? Add her to your boats, then share a photo — names, numbers and faces are blurred before it appears.
Other Dufour models
- Dufour Classic 36 2000–2004
Researched from public sources. Spotted an error? The sources are listed above — tell us what they got wrong.