Hallberg-Rassy 31

Built 1992–2009 by Hallberg-Rassy (Ellos, Sweden)

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About the Hallberg-Rassy 31

Researched from public sources for this model. Any individual boat may have been modified or repowered — confirm before relying on any figure.

Illustration of a Hallberg-Rassy 31 — **Illustration, not a photo of this model.** AI-generated illustration of a typical mid-size cruising sloop.

Built: 1992–2009
Builder: Hallberg-Rassy (Ellos, Sweden)
Designer: German Frers
Length: 31.56 ft
Waterline: 27.1 ft
Beam: 10.83 ft
Draft: 5.61 ft
Displacement: 9,921 lb
Ballast: 4,409 lb
Hull / keel: fin keel
Rig: sloop
Fuel: 16 gal
Water: 50 gal
Number built: 356
Stern thruster: not fitted
Steering: tiller

Tank capacities — where the figures come from

Fuel 16 gal
“60 litres / 15.9 US gallon” — builder (1992-2005 (Mk I)), hallberg-rassy.com · “60 litres / 15.9 US gallon” — builder (2006-2009 (Mk II, from hull 307)), hallberg-rassy.com

Same tank in Mk I and Mk II.
Water 50 gal
“190 litres / 50.2 US gallon” — builder (1992-2005 (Mk I)), hallberg-rassy.com · “190 litres / 50.2 US gallon” — builder (2006-2009 (Mk II, from hull 307)), hallberg-rassy.com

Same tank in Mk I and Mk II.
Holding unknown
Builder data sheets list no holding tank.
Water heater unknown
“Foot pump for fresh water in the galley and toilet compartment.” — builder, hallberg-rassy.com · “Hallberg-Rassy 31 Scandinavia has the following additional equipment ... Pressure water system” — builder, hallberg-rassy.com

The Mk I and Mk II standard specifications give foot pumps only; the Mk I Scandinavia package adds a pressure water system, but neither spec names a water heater, so whether one was fitted isn't documented.

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
Neither the Mk I nor the Mk II standard specification, nor the Mk II brochure, mentions a thruster; no option list found.
Stern thruster not fitted
The builder's standard specs list none, but our earlier figure of none isn't proven.
Steering tiller
“Stainless steel ruddershaft. Tiller steering.” — builder, hallberg-rassy.com · “Stainless steel ruddershaft. Tiller steering.” — builder, hallberg-rassy.com

Tiller steering is standard in both the Mk I and Mk II builder specifications. The documents found don't say whether wheel steering was offered as an extra.

Thrusters and steering are often replaced — check the units on your boat before ordering parts.

Fractional sloop, spade rudder, lead ballast; shoal keel 4.62 ft. Later boats had the Volvo 2020. Early 1992 boats had no fixed windshield. Drive type (shaft or saildrive) not stated in sources read.

Engines fitted

Volvo Penta 2002 (2-cyl) — diesel, single standard
Hallberg-Rassy's own HR 31 Mk I page lists the engine as a Volvo Penta 2002 (2 cylinders), later the 2020. Its power line reads '14 / 19' without units, so the 2002's rating is not stated clearly; hp left null.

Sources: hallberg-rassy.com
Volvo Penta 2020 (3-cyl) — 19 hp, diesel, single standard
Builder page: later Mk I boats had the 3-cylinder Volvo Penta 2020; SailWiki also says later models had the 2020. Rating read as 19 hp (14 kW), matching the builder's figure for the Mk II engine.

Sources: hallberg-rassy.com · sailwiki.com
Volvo Penta D1-20 (3-cyl) — 19 hp, diesel, single standard
Builder: from hull 307 (Mk II, 2006-09) the engine is a Volvo Penta D1-20, 14 kW / 19 hp. The HR 31 was built 1992-2009, 356 boats.

Sources: hallberg-rassy.com

Boats of the same model can differ — check which engines yours actually has before ordering parts.

Generator

Builder specs mention only the engine alternator; no generator.

Manuals and brochures online

Spec sheet Hallberg-Rassy 31 Mk I data sheet (previous models page) (1992-2005) — hallberg-rassy.com
Spec sheet Hallberg-Rassy 31 Mk II data sheet (previous models page) (2006-2009) — hallberg-rassy.com
Spec sheet Hallberg-Rassy 31 (Mk I) standard specification (English) — hallberg-rassy.com
Spec sheet Hallberg-Rassy 31 Mk II standard specification (English/German/Swedish) — hallberg-rassy.com
Brochure Hallberg-Rassy 31 Mk II colour brochure — hallberg-rassy.com

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 2001 / 2002 / 2003 / 2003T parts: limited

Factory standard engine — you entered “Volvo Penta 2002 (2-cyl)”

Parts are available through Volvo Penta but owners consider them unique and overpriced (e.g., 2003T turbo, aluminum heat exchanger and oil cooler each quoted in the $1,700–3,000 range). Workarounds include converting the 2003T cooling system to aftermarket cupronickel heat exchanger and oil cooler, using the common aftermarket turbo, and cross-referencing some Perkins parts. Parts4Engines stocks aftermarket service parts.

Parts sources: Parts4Engines, Power Products Systems (genuine Volvo Penta parts)

Common problems (3)

Aluminum oil cooler and heat exchanger failures (2003T) cooling
The aluminum oil cooler and heat exchanger are the usual first failures, and genuine replacements are very expensive, so some owners convert to aftermarket coolers or repower.
cruisersforum.com · facebook.com
Carboned exhaust elbow and turbo from low-load running exhaust
Long periods at low rpm carbon up the elbow and the 2003T turbo; the turbo can also be wrecked if it ingests the intake silencer foam.
cruisersforum.com
Hard starting on older raw-water-cooled 2002s engine
Original raw-water-cooled 2002s are described as reliable but difficult to start.
forums.ybw.com

Maker’s service schedule (10)

Engine oil & filter change	100 hrs or 1 yr	“100 HOURS (OR SEASONAL) ENGINE SERVICE” — manufacturer, sbo.sailboatowners.com
Oil filter change (every second oil change)	200 hrs or 2 yrs	“The oil filter should be changed after the first 20 hours of running, and thereafter at every second change of engine oi” — manufacturer, sbo.sailboatowners.com
Air filter / intake silencer 2001, 2002, 2003 (clean)	1 yr	“The intake silencer should be cleaned each season.” — manufacturer, sbo.sailboatowners.com
Air filter / intake silencer 2003T (replace)	2 yrs	“On 2003T the intake silencer should be replaced once every two years.” — manufacturer, sbo.sailboatowners.com
Transmission fluid change	400 hrs or 1 yr	“The oil in the drive should be changed after every 400 hours or at least once a season.” — manufacturer, sbo.sailboatowners.com
Raw-water pump impeller	100 hrs or 1 yr	“CHECK/CHANGE THE IMPELLER” — manufacturer, sbo.sailboatowners.com
Valve clearance check / adjust	100 hrs or 1 yr	“CHECK VALVE CLEARANCE Checking and adjusting the valve clearance should only be carried out by an authorized Volvo Penta” — manufacturer, sbo.sailboatowners.com
Dismantle and clean the vacuum (siphon-break) valve	1 yr	“To make sure that the vacuum valve functions properly it should be dismantled at least once every season.” — manufacturer, sbo.sailboatowners.com
Replace S-drive rubber seal (dealer) S-drive (saildrive) installations	7 yrs	“The seal should be changed every seven years.” — manufacturer, sbo.sailboatowners.com
Replace rubber stuffing box (shaft seal) Shaft installations with a rubber stuffing box	500 hrs or 5 yrs	“The rubber stuffing box must be replaced after 500 hours or 5 years.” — manufacturer, sbo.sailboatowners.com

Service part numbers (7)

Oil filter	Volvo Penta 22057107 Replaces 834337	“p.90 "2001, 2002, 2003, 2003T" block: Oil filter — 22057107” — manufacturer, volvopenta.com · “Volvo Penta genuine oil filter to replace old model 834337. Fits … 2001, 2002, 2003, 2003T” — dealer, foxschandlery.com
Fuel filter	Volvo Penta 21492771 Replaces 829913, 3825133	“p.90 "2001, 2002, 2003, 2003T" block: Fuel filter — 21492771” — manufacturer, volvopenta.com · “Brandstoffilter Volvo Penta 21492771 (vervangt 829913) … Volvo Penta 2001 … 2003T” — dealer, bakker-ijlst.nl
Raw-water impeller 2001, 2002, 2003 (not 2003T)	Volvo Penta 21951342 Replaces 3586496, 875583 Also: Johnson 09-808B	“p.90 "2001, 2002, 2003, 2003T" block: Impeller kit (2001, 2002, 2003) — 21951342” — manufacturer, volvopenta.com · “Replaces: Johnson Impeller 09-808B / Jabsco Impeller 22405-0001 … 875583-7, 21951342. Used on Volvo Penta 2001, 2002, 20” — dealer, marineenergy.com.au
Raw-water impeller 2003T	Volvo Penta 21951346 Replaces 3862281, 3855546, 3856039	“p.90 "2001, 2002, 2003, 2003T" block: Impeller kit (2003T) — 21951346” — manufacturer, volvopenta.com · “Volvo Penta: 21951346, 3862281, 3855546, 3856039 / 2003T, MD22A, TMD22A, MD22B, TMD22B, D2-55, D2-75” — dealer, repowermarine.com
Thermostat raw-water (directly) cooled 2001 / 2002 / 2003	Volvo Penta 877355 Replaces 876691	“Volvo Penta 2001, 2002, 2003 thermostat kit – 877355 … Replaces: 876691” — dealer, ab-marineservice.com · “Thermostat Volvo Penta 2001 2002 2003 - 877355 … 2001 (Directly cooled) 2002 (Directly cooled)” — dealer, marinedustrie.com
Drive belt raw-water-cooled 2002 / 2003 / 2003T (alternator)	Volvo Penta 966900 Replaces 958303	“Part Number: 966900 … Supersedes: 958303 … 2002 / 2002AG / 2002B / 2002BG … 2003T / 2003TB” — dealer, marisolmarine.com · “V Belt for Volvo Penta 2002, 2003 with Raw Water Cooling … Replace Volvo Penta: 966900, 958303” — dealer, repowermarine.com
Maintenance kit (oil filter, fuel filter, impeller with gaskets)	Volvo Penta 877194	“p.89 Maintenance kits for diesel engines: 2001, 2002, 2003 — 877194” — manufacturer, volvopenta.com · “Servicekit Volvo Penta 2001 2002 2003 - 877194” — dealer, marinedustrie.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.

Volvo Penta D1 / D2 series (D1-13 to D2-75) parts: good

Factory standard engine — you entered “Volvo Penta D1-20 (3-cyl)”

Current-generation small Volvo diesels (Perkins-derived per owners). Glow plugs, injectors and filters can be bought cheaper via Perkins and aftermarket sources; stainless replacement exhaust elbows are sold aftermarket.

Parts sources: MarineDustrie, AB Marine Service (exhaust elbow)

Common problems (3)

Exhaust elbow / manifold corrosion exhaust
The cast elbow rots and has a narrow water passage, which lets water back into the manifold and corrode it through where the two meet; an aftermarket stainless elbow is the usual fix.
sailnet.com · myhanse.com
Fuel pump controller failure fuel
Contamination or failure of the fuel pump controller is listed as one of the most common D1 faults.
marinedustrie.com
Overheating from corroded heat exchanger/manifold cooling
Corrosion holes in the combined heat exchanger/manifold cause overheating on D1 and D2 engines.
myhanse.com · facebook.com

Maker’s service schedule (16)

Engine oil & filter change D2-55 / D2-75 (2006 operator's manual 7747110)	500 hrs or 1 yr	“After that they should be changed every 500 operating hours or at least once a year.” — manufacturer, noshoes-resoled.com
Fuel filters & water separator D2-55 / D2-75 (2006 operator's manual 7747110)	500 hrs or 1 yr	“Every 500 operating hours or at least once a year, included in Extended Protection” — manufacturer, noshoes-resoled.com
Raw-water pump impeller D2-55 / D2-75 (2006 operator's manual 7747110)	500 hrs or 1 yr	“Every 500 operating hours or at least once a year, included in Extended Protection” — manufacturer, noshoes-resoled.com
Check idling speed D2-55 / D2-75 (2006 operator's manual 7747110)	500 hrs or 1 yr	“Every 500 operating hours or at least once a year, included in Extended Protection” — manufacturer, noshoes-resoled.com
Clean the vacuum (siphon-break) valve D2-55 / D2-75 (2006 operator's manual 7747110)	500 hrs or 1 yr	“Every 500 operating hours or at least once a year, included in Extended Protection” — manufacturer, noshoes-resoled.com
Transmission fluid change D2-55 / D2-75 (2006 operator's manual 7747110)	200 hrs or 1 yr	“Every 200 operating hours or at least once a year, included in Extended Protection” — manufacturer, noshoes-resoled.com
Lubricate the propeller-shaft seal (reverse-gear installations) D2-55 / D2-75 (2006 operator's manual 7747110)	200 hrs or 1 yr	“Every 200 operating hours or at least once a year, included in Extended Protection” — manufacturer, noshoes-resoled.com
Check S-drive / reverse-gear corrosion protection (anodes) D2-55 / D2-75 (2006 operator's manual 7747110)	200 hrs or 1 yr	“Every 200 operating hours or at least once a year, included in Extended Protection” — manufacturer, noshoes-resoled.com
Air filter / intake silencer D2-55 / D2-75 (2006 operator's manual 7747110)	500 hrs or 2 yrs	“Every 500 operating hours or at least once every two years” — manufacturer, noshoes-resoled.com
Coolant replacement & freeze-point test D2-55 / D2-75 (2006 operator's manual 7747110)	500 hrs or 2 yrs	“Every 500 operating hours or at least once every two years” — manufacturer, noshoes-resoled.com
Heat exchanger & oil cooler cleaning D2-55 / D2-75 (2006 operator's manual 7747110)	500 hrs or 2 yrs	“Every 500 operating hours or at least once every two years” — manufacturer, noshoes-resoled.com
Injector test / service D2-55 / D2-75 (2006 operator's manual 7747110)	500 hrs or 2 yrs	“Every 500 operating hours or at least once every two years” — manufacturer, noshoes-resoled.com
Valve clearance check / adjust D2-55 / D2-75 (2006 operator's manual 7747110)	500 hrs or 2 yrs	“Every 500 operating hours or at least once every two years” — manufacturer, noshoes-resoled.com
Check S-drive rubber seal (hull/drive); clean folding propeller D2-55 / D2-75 (2006 operator's manual 7747110)	1 yr	“Least once a year, included in Extended Protection” — manufacturer, noshoes-resoled.com
Replace propeller-shaft seal (reverse-gear installations, workshop) D2-55 / D2-75 (2006 operator's manual 7747110)	500 hrs or 5 yrs	“Every 500 operating hours or at least every fifth year” — manufacturer, noshoes-resoled.com
Replace S-drive rubber seal between drive and hull (workshop) D2-55 / D2-75 (2006 operator's manual 7747110)	7 yrs	“Every seventh year” — manufacturer, noshoes-resoled.com

Service part numbers (5)

Oil filter D1-30, D2-40, D2-50, D2-55, D2-60, D2-75	Volvo Penta 3840525	“p.90 "D1-30, D2-40" block: Oil filter — 3840525” — manufacturer, volvopenta.com · “# Volvo Penta D2-40 … [OIL FILTER] Part Number: 3840525” — dealer, marinepartsexpress.com
Fuel filter	Volvo Penta 861477	“p.90 "D1-13, D1-20" block: Fuel filter — 861477” — manufacturer, volvopenta.com · “# Volvo Penta D1-30 … [FUEL FILTER] Part Number: 861477” — dealer, marinepartsexpress.com
Raw-water impeller D1-13, D1-20, D1-30, D2-40	Volvo Penta 22222936	“p.90 "D1-13, D1-20" block: Impeller kit — 22222936” — manufacturer, volvopenta.com · “IMPELLER KIT … D2-40,D2-40B,D2-40F,D1-30,D1-30B,D1-30F,… D1-13,D1-13B,D1-13F,D1-20” — dealer, volvopentaparts.shop
Raw-water impeller D2-50, D2-55, D2-60, D2-75	Volvo Penta 21951346 Replaces 3862281, 3855546, 3856039	“p.90 "D2-50, D2-55, D2-60, D2-75" block: Impeller kit — 21951346” — manufacturer, volvopenta.com · “Volvo Penta: 21951346, 3862281, 3855546, 3856039 / … D2-55, D2-75” — dealer, repowermarine.com
Thermostat D1-13 to D2-75	Volvo Penta 3842015	“# Volvo Penta D1-30 … [THERMOSTAT] Part Number: 3842015” — dealer, marinepartsexpress.com · “Genuine Volvo Penta Thermostat 3842015 D1-13, D1-20, D1-30 D2-40, D2-55, D2-60, D2-75” — dealer, repowermarine.com
Drive belt D1-13, D1-20, D1-30, D2-40 (alternator / coolant-pump multi-rib belt)	Sources disagree: 21951188 / 21951188 / 21314684	“Part Number: 21951188 … Supersedes: 3812159 … D1-13 (B and F variants) … D2-40” — dealer, marisolmarine.com · “Volvo Penta 21951188 Alternator belt D1-30 D1-30F D1-30B D2-40 D2-40B D2-40F” — dealer, dedieseldokter.nl

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 · hallberg-rassy.com · sailwiki.com · hallberg-rassy.com · hallberg-rassy.com · hallberg-rassy.com

Other Hallberg-Rassy models

Researched from public sources. Spotted an error? The sources are listed above — tell us what they got wrong.