Dufour Yachts DUFOUR 34 User manual

DUFOUR YACHTS
LA ROCHELLE
OWNER'S MANUAL
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DUFOUR 34

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DUFOUR 34
Your agent
Name
Address
is DUFOUR YACHTS' representative and will give you all the help you need to solve
any problems you might have during launching and masting, as well as with technical checks
for bringing your boat into service and maintaining it. If necessary, he will help you with the
administrative process of registering your boat.
As soon as you become the owner, familiarize yourself with the manual supplied with your
boat, sign and date the receipt acknowledgements below, and give (or send) the last one to
your agent.
Owner's Manual receipt acknowledgement to be kept in your Manual
I, the undersigned:
Name
owner of DUFOUR 34 no.
confirm that I have received the DUFOUR 34 Owner's Manual and accept its being written
in the French language.
On:
Signature:
Detach along dotted line
…………………………………………………………………………………………………………………
Owner's Manual receipt acknowledgement to be returned to DUFOUR YACHTS
Z.I.- 1, Rue Blaise Pascal- 17187 PERIGNY CEDEX- FRANCE
I, the undersigned:
Name
Address
owner of DUFOUR 34 no.
confirm that I have received the DUFOUR 34 Owner's Manual and accept its being written
in the French language.
On:
Signature:
CONTENTS

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DUFOUR 34
Introduction
1. Design category of yacht
2. Specifications
3. Electrical systems
4. Gas installation
5. Drain and sanitation system
6. Flooding
7. Fire protection
8. Engine
9. Fuel installation
10. Steering system
11. Sailing
12. Lightning protection
13. Environmental protection
14. Safety facilities
15. Handling, transporting, haulout
16. Guarantee Conditions – Transfer of Ownership
DRAWINGS
1 Presentation
2 Layout
3 Deck fittings
4 Sail plan
5 Halyard and sheet rigging plan
6 110 V circuit
7 220 V circuit
8 Charging and power circuit
9 12 V electrical panel
10 12 V electrical panel terminals
11 12 V electrical installation
12 220 V electrical installation
13 Steering system
14 Gas system
15 Abandoning ship
16 Fresh water system
17 Drainage system
18 Skin fittings
19 Engine installation
20 Holding tank (Option)
21 Sea and inland waterways charter
22 SNSM (National Sea Rescue Society) page

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DUFOUR 34
INTRODUCTION
DUFOUR YACHTS is delighted to present you with this manual that will enable you to
get to know your boat better.
This manual has been produced to help you enjoy the use of your boat in complete safety.
Read it carefully, in particular to avoid fire and flooding risks, and familiarize yourself with
your boat before using it.
If this is your first boat, or if you are changing to a type of boat you are unfamiliar with, for
your convenience and safety, make sure you gain experience in handling and use before
taking command of your boat. Your agent, your national yachting federation or your yacht
club will be more than happy to recommend local sailing schools or qualified instructors.
KEEP THIS MANUAL IN A SAFE PLACE AND PASS IT ON TO THE NEW
OWNER IF YOU SELL YOUR BOAT.
NOTICE: Our boats are regularly improved in the light of our customers' experiences and
research by the shipyard, and so the specifications given in this Owner's Manual are not
contractually binding and may be changed without notice and without any obligation to
update.
This manual is intended to cover as much information as possible, so certain equipment or
paragraphs might not apply to your boat. In case of doubt, please refer to the inventory
which should have been given to you by your agent when you placed your order.

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DUFOUR 34
1. DESIGN CATEGORY OF YACHT
Your DUFOUR 34 comes under the OCEAN-GOING design category (category A).
In normal conditions of use, your boat is designed for sailing with effective wave heights up
to 7 m and winds of Beaufort Force 10 or less, and to withstand the severest conditions.
This sailing capability is equally dependent on the skills of the crew, their physical capacities,
the maintenance of the boat and its equipment.
So always take care before putting to sea.
DUFOUR YACHTS is not able to guarantee perfect functioning of the boat in exceptional sea
conditions (violent storms, hurricanes, cyclones, waterspouts,...)
DESIGN CATEGORIES
Design
Categories Type of sailing Wind strength (Beaufort) Wind speed Effective height of wave to be taken
into account
A Ocean-going Up to and
including 10 Up to 28 m/s Up to 7 m
B Open sea Up to and
including 8 Up to 21 m/s Up to and including 4 m
C Inshore Up to and
including 6 Up to 17 m/s Up to and including 2 m
D Sheltered waters Up to and
including 4 Up to 13 m/s Up to and including 0·3 m
2. BOAT SPECIFICATIONS
2.1. General specifications
Model: DUFOUR 34
Designer: Umberto Felci
Design category A
Notified organization no. CE/0609
LOA: 10.60 m
Hull length: 10,28 m
LWL: 9.13 m
Maximum beam: 3.48 m
Draught short / long: 1.49 m /1.92 m
Mast height clearance: 15.00 m
Ballast weight short / long: 1 750 / 1 670 kg
Light displacement: 5 944 / 5 864 kg

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DUFOUR 34
Standard mainsail area (approximate) 29,30 m²
Roller-furl genoa area (approximate) 32,50 m²
Water capacity excluding water-heater
(approximate) 285 L
Diesel capacity (approximate) 90 L
Holding tank (depending on option) 42 L/ 45L
Engine battery (depending on version) 75 Ah
Auxiliary battery (standard version) 75 Ah
Primary means of propulsion Sail
Maximum permissible on-board engine power 23 kw
2.2. Maximum loading
Category A B C
Number of people 8 people 8 people 8 people
Crew weight (75 kg/person) 600 600 600
Basic safety equipment 61 61 61
Stores & cargo 160 160 160
Life-raft
(not included in standard kit) 69
69 69
Max. recommended loading (kg):
Indicated on information plate. 890 890 890
NB: The recommended maximum loading does not include the contents of the various tanks installed on board
by the builder.

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3. ELECTRICAL SYSTEMS
3.1. Safety and operating instructions for the electrical system
WARNING
Always:
−Check the condition of the batteries (charge and electrolyte level) and the charging
−system before putting to sea.
−Disconnect and remove batteries for wintering.
−Do not let battery voltage drop below 10·5 V during wintering.
−Carry spare lamps for all navigation lights and interior lighting.
−Respect power ratings, particularly for navigation lights.
−Check operation of the navigational instruments.
−Check operation of navigation lights before night sailings
Never:
−Work on an electrical installation that is live.
−Make any modification to an installation and the relevant diagrams, unless it is
carried out by an electrician qualified in marine electrics.
−Change or modify the breaking capacity of overload protection devices.
−Replace electrical apparatus or equipment with units exceeding the rated capacity
without uprating wiring and protection.
−Leave the boat unattended when the electrical installation is powered, with the
exception when applicable of the automatic bilge pump and the fire or theft
protection circuits.
If a fuse or circuit-breaker blows continually, a specialist must be consulted to
determine the origin of the short-circuit.
3.2. Installing new equipment
Since the 1st January 1996, electrical equipment is subject to the European
"electromagnetic compatibility" directive (Ref 89/336/CEE). Hence it is necessary to
install new equipment meeting this standard and bearing the CE mark. Equipment must
also be supplied with a compliance certificate and instructions for use.
In the case of 220 or 110 V installations, use only double-insulated or earthed
equipment. When such equipment is being installed, respect the fitting instructions
(conductor size, protection).
To avoid maintenance problems, be sure to mark in the manual and modifications that
may be made to the electrical diagram.

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3.3 Batteries
The battery capacity has been designed to meet the power requirements of the on-board
accessories. To avoid any problems, it is necessary to keep a close eye on the
maintenance and correct charging of the batteries.
NOTE
- When installing new electrical appliances, take care that the overall consumption of
these appliances remains within the capacity of your batteries.
-Always disconnect the -ve battery terminal before the +ve terminal
-Never allow a conductive object (tools, etc…) to bridge the two battery terminals
-When handling batteries, keep them horizontal to avoid spillage of electrolyte. Wear
gloves and protective clothing that will prevent any risk of contact with electrolyte
in the event of a leak.
-In the event of electrolyte splashes, rinse the affected part of the body copiously and
consult a doctor.
3.4 Electric winch
NOTE
It is essential to run the engine with the throttle slightly open when using the electric
winch.

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3.5 220/110 Volt installation
DANGER
The on-board 220 or 110 V installation is protected by a circuit breaker and fitted with a
residual current device. The wiring of additional 220 or 110 V on-board accessories
must be carried out by professionals, with uprating of the master circuit-breaker if
necessary.
DANGER
Your boat is not supplied with a shore/boat supply cable or a male plug for the shore
outlet. The cable must be suitable for outdoor use. Its cross-sectional area must be
adjusted according to its length and the rating of the main circuit-breaker (see
electrical diagram). The plug must be suitable for the female socket on the shore (if
necessary, seek the advice of a professional)It should be as near as possible to the IP
67 / IEC529 type
-Switch off the shore supply at the on-board isolator before connecting or
disconnecting the shore/boat supply cable.
-Connect the shore/boat supply cable at the boat end before connecting it to
the shore outlet
-Disconnect the shore/boat supply cable at the shore outlet before
disconnecting it at the boat end
-Close the shore outlet cover properly

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4. GAS INSTALLATION
4.1 Operating advice
−Read the instructions for the cooker and regulator carefully.
−Ensure that the gas cylinder and regulator are in accordance with the requirements of
the cooker (flow rate, pressure, type of gas).
−Ensure that the gas cylinder complies with the regulations in force in the country
where it is being used.
−Appliances burning fuel use up the oxygen in the cabin and release combustion
products into the boat. Ventilation is required when appliances are alight. Open the
coachroof ports while you are cooking.
−Do not use the oven as a heater.
−Do not obstruct quick access to the elements of the gas installation (cylinder locker,
shut-off valve).
−The gas cylinder must always be stowed in the space provided
−Never leave the boat unattended when gas appliances are alight.
−Close all valves in the circuit when the boat is left empty (shut-off valve, regulator
valve), even if the cylinder is considered to be empty.
−After the boat has been shut up, never smoke when going below, and ensure that
there is no smell of gas.
−If you smell gas, close the circuit valves and the cooker taps, ventilate the boat, and
find the leak before using the installation again.
WARNING
In the event of an emergency, the circuit valves must be closed immediately.

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4.2 Checking the system
- The gas system must be tested periodically:
°Close all the cooker taps.
°Open the cooker supply and regulator valves.
°Check all connections are gas-tight using a leak detector or by applying soapy
water.
ATTENTION!
Do not use solutions containing ammonia.
DANGER!
Never use a naked light to look for leaks.
Repairs and modifications to the system should be carried out by a qualified
person.
Flexible hoses must be:
-Checked regularly, at least once a year,
-Replaced if the expiry date marked on the hose is passed,
-Replaced five years after the date of manufacture that may be marked on
them,
-Replaced in the event of deterioration.
4.3. Changing the gas cylinder
DANGER!
- Close the cooker taps and those before the cooker.
- Do not smoke nor use a naked light during replacement of the gas cylinder.

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5. DRAIN AND SANITATION SYSTEM
5.1. Specifications of the drain system
Pump type Theoretical flow rate
Manual 39 l / 60 strokes/min.
Electric 1.000 L / h
Read carefully the operating and maintenance instructions for the bilge pump that
goes with your boat.
WARNING!
−Ensure that bilge pumps are in working order before putting to sea
−Know where to find the hand pump and its handle
−Know where to find the switch for the electric pump on the electrical panel
−Clean the well and pump filters regularly
−The bilge pump system is not intended to keep the boat afloat in the event of
damage. It is intended to remove water coming from spray, leaks from seacocks or
any other moderate leaks.
5.2. Pressurised fresh water pump
Fresh water is supplied to the sink and washbasins by an electric pump. A filter is
installed upstream of the pump, and must be cleaned regularly.
Never allow the pump to run if the tank is empty. Change over to the other tank
or fill up.
Hot water is produced by a water-heater connected to the engine cooling circuit and
the shore electric supply.
After the water-heater has been emptied, make sure that the element is covered
before power is re-applied.

5.3. Seacocks
Seacocks are of the 1/4-turn type:
- OPEN position: handle in line with seacock body,
- CLOSED position: handle perpendicular to seacock body.
OPEN CLOSED
ATTENTION!
−Never interfere with the tightening of the seacocks to the hull. In the event of a
leak, consult a professional.
−In bad weather or when leaving your boat, close all the sanitation system seacocks.
−Keep seacocks closed when not being used.
−During wintering, clean and rinse the seacocks and skin fittings. Inspect the brass
accessories; slight surface corrosion is normal.
−In the event of more serious corrosion, consult your agent.
5.4. Operation of the sea toilets
−Open the sea water inlet seacock.
−Open the bowl emptying seacock.
−Set the lever to the "FLUSH" position.
−Operate the pump.
−To empty the bowl and avoid any water slopping when heeling, set the lever to
the "DRY BOWL" position.
−Operate the pump until the bowl is dry.
−Repeat these flushing / emptying operations as many times as is necessary to
ensure complete emptying of the pipes.
−When toilets are not being used, set the lever to the "DRY BOWL" position, or
the "CLEF" position for certain models.
−Close seacocks after use, as the toilet is below the waterline
−Change the toilet seals regularly
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6. FLOODING
Boat flooding risks:
- Before putting to sea, always check that portholes, deck hatches and any other
openings that could allow flooding are shut.
- When under sail, close all seacocks, except the engine water intake.
- Periodically check:
- Skin fittings, seacocks and pipes are watertight
- Proper emptying of the cockpit drains.
-Watertightness of the stern gland.
WARNING!
Cockpit locker lids must be fastened shut before putting to sea. This is particularly
important for the lockers representing a major flooding risk (for example, removable
locker for TD helmsman's seat, TD cockpit locker in the 2-cabin version)
7. FIRE PROTECTION
7.1. Installation
- Fire extinguishers are subject to national regulations, for this reason they are not
supplied with your boat.
- We recommend you to equip your boat with fire extinguishers meeting the ISO
9094-1 standard, with the following specifications:
a) Minimum capacity per extinguisher: 5A/34B,
b) Minimum combined extinguisher capacity: 10A/68B,
c) 1 extinguisher within:
- 1 m (for boats < 10 m) or 2 m (for boats > 10 m) of the cockpit
- 2 m of the extinguisher opening for dowsing the engine,
d) 1 extinguisher within 2 m of the cooker,
e) 1 extinguisher within 5 m of the bunks.
f) CO2 extinguishers may be placed in accommodation areas only where
flammable liquids are present (e.g. galley) or where there is powered electrical
equipment. There must not be more than one CO2 extinguisher per area at risk,
and its maximum capacity must not exceed 2 kg.
Only compatible replacement parts must be used in fire protection systems. They
must bear the same markings and be technically equivalent.

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7.2. Safety instructions
NOTE
It is the responsibility of the owner / captain to:
−Have fire-fighting equipment checked in accordance with the stipulations of the
builder and the regulations in your country.
−Replace fire-fighting equipment if it has expired or been discharged, by extinguishers
of equal or greater capacity.
−Show members of the crew:
•The location and operation of fire-fighting equipment
•The location of the engine compartment extinguishing hole (located on
the companionway).
−Ensure that fire-fighting equipment is readily accessible whenever the boat is
occupied.
Never:
−Obstruct gangways to emergency exits (deck hatches)
−Obstruct safety controls (gas valves, fuel valves, electrical switches).
−Obstruct fire extinguisher stowages.
−Leave the boat unattended with a cooker or heater alight.
−Use a gas lamp in the boat
−Fill a fuel tank or change a gas cylinder while the engine is running, or the cooker or
heater are alight.
−Smoke while handling fuel or gas.
−Fit free-hanging curtains near the cooker or any other appliance with an open flame.
−Store flammable products in the engine compartment.
Always keep the bilges clean and check that there is no fuel vapour or gas.
WARNING
−If a CO2extinguisher is fitted, the following information must be displayed close to
its location:
"This extinguisher contains CO2 - use only on electrical or cooker fires. To avoid
suffocation after discharging, leave the area immediately. Ventilate before re-
entering."
−Do not open the engine compartment immediately after putting out a fire, to avoid
the release of toxic smoke or spraying of burning materials (oil, water).

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8. ENGINE
Regular maintenance must be carried out in accordance with the engineer's recommendations.
Read carefully the engine operating instructions that come with the boat. Do not hesitate to
consult your agent or a qualified professional.
In particular, follow the instructions for wintering.
In the absence of other instructions, proceed as follows:
-Close the engine water intake seacock,
-Disconnect the pipe from the engine water intake seacock,
-Drain the sea-water circuit,
-Place the pipe into a drum of -25° anti-freeze coolant,
-Run the engine until the fluid comes out of the exhaust,
-At the end of this operation, re-connect the pipe to the seacock,
-Attach a notice to the electrical panel and the battery isolator to the effect
that the engine water intake seacock is closed.
NOTE
- Do not use sail and engine if the heel angle is more than 10°
- Any engine change must respect the capacities of the boat and be performed by an
engineer specializing in marine mechanics.
8.1. Launching the boat / settings
NOTE
-Ensure that the cooling circuit water intake seacock is open, and that water is
coming out of the engine exhaust.
-Boats fitted with rotating seal stern gland: bleed the air from the gland after each
launch.
Regularly check the condition of the anodes and ensure that they are suitable for the
boat's environment (fresh water, salt water).
8.2. Exhaust gas emission
DANGER!
Internal combustion engines produce carbon monoxide. Prolonged exposure to exhaust
gasses can have serious consequences, and may even cause death.

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8.3. Safety
DANGER!
-In order to avoid all risk of serious injury from the propeller, the engine must not be
started when there are swimmers near the boat.
-Whenever possible, the engine must be stopped for any engine maintenance or
checking operations. If not, special attention must be paid to moving items (belts,
etc...) in order to avoid any risk of injury.
9. FUEL INSTALLATION
Flexible fuel pipes must be:
- Replaced by pipes bearing the same markings
- Replaced in the event of deterioration.
ATTENTION!
−Depending on the trim and loading of your boat, the whole of the nominal fuel
capacity may not be usable. Always maintain a 20% reserve for safety.
Never:
−Store flammable materials in unventilated spaces.
−Smoke while filling tanks.
−Obstruct ventilation openings (vents, engine ventilation grilles).
−Modify the installation, unless this is carried out by a technician qualified in this
field.
10. STEERING SYSTEM
The steering system plays a vital rôle in the safety and comfort of your boat.
10.1 Wheel
The Dufour 34 is fitted with a wheel with a system of rudder cables and chains .
Periodic checks to be performed:
-Check the play in the various components (rudder stock/bearings, rudder cable
tension and wear).
In the event of doubt or a problem, consult your agent.

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10.2. Emergency tiller
NOTE
- The Dufour 34 is equipped with an emergency tiller that must be kept readily
accessible, we advise you to stow it in a cockpit locker near the tiller deck plate.
- It is only designed for sailing at reduced speed in the event of damage to the helm.
To use it:
- Unscrew the tiller deck plate cover located in the cockpit floor,
-Fit the tiller onto the head of the rudder stock.
11. SAILING
WARNING
−In all situations, suit the speed of your boat to the surrounding conditions and always
maintain a safety margin. Pay particular attention to:
The state of the sea, currents, the strength of the wind.
Other boat movements
Manœuvres in port
When passing through mooring areas.
−Obey the rules of priority as defined in the rules of the road and imposed by the
COLREG
−Ensure that you always leave enough room for stopping or manœuvring if necessary
to avoid a collision
−Respect speed limit zones
−Out of courtesy and for the safety of other boats, take care not to create a large wash
near other boats
WARNING
−You must fit your boat with grab lines. Fixing points are provided on the deck. Refer
to your boat's deck fittings drawings.
−The stability of your boat was designed taking into account the shipyard catalogue
options. Any alteration to on-board weight distribution (for example: adding a radar,
changing the engine, etc...) can affect the stability, trim and performance of your
boat.
−Towing a boat causes a significant extra strain that will have an unfavourable effect
on the stability of your boat.
Never:
−Use the boom to lift heavy weights.

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12. LIGHTNING PROTECTION
Your boat is protected against lightning. The rigging is electrically connected to earth.
Nonetheless, for your safety, it is necessary to respect certain precautions.
12.1. Maintenance
If the boat has been struck by lightning:
- The protection installation must be inspected to detect physical damage and
check the integrity of the device, as well as the continuity of the earthing.
- The compasses, electrical and electronic devices must be examined in order to
ascertain if damage or calibration changes have occurred.
12.2. Protection of people during a thunderstorm
WARNING
During a thunderstorm, it is preferable to obey the following instructions:
−People should stay below as far as possible.
−People should stay out of the water and not let their arms or legs hang into the
water.
−Whilst maintaining satisfactory control of the boat and its sailing, people
should not touch any part connected to a lightning protection installation,
especially not in such a way as to form a link between such parts.
−It is desirable that people should avoid any contact with metal parts of the
rigging, the spars, deck fittings and the lifelines.
13. ENVIRONMENTAL PROTECTION AND SAFETY
We recommend keeping yourself informed about local regulations concerning respect for the
environment, and to obey international regulations against pollution in the marine
environment (MARPOL) as well as codes of good practice.
ATTENTION!
−Most cleaning products, engine oils and hydrocarbons are likely to affect the environment,
so they should be discharged in authorized locations (check with the Harbour Master's
office).
−Certain products can likewise represent a risk for your own and others' safety, which is
why it is important to read and obey the instructions for use.
−Substances used must be labelled and stored in an appropriate, ventilated place in the boat.

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14. SAFETY FACILITIES
There is no harmonization of obligatory safety equipment across the European Community.
You should seek information about national requirements for CE-marked boats.
In France, yachts bearing the CE mark must carry the facilities and safety equipment
stipulated for the category of sailing chosen by the yachtsman within the following limits:
Design category Possible sailing categories
A 1.2.3.4.5.6
B 2.3.4.5.6
C 4.5.6
D 6
If your boat is equipped with a life-raft, read its instruction manual carefully. The crew should
be familiarized with the use of all safety equipment (harnesses, flares, life-raft, etc...).
Training sessions are organized regularly by sailing schools and clubs.
15. HANDLING, TRANSPORTING, HAULOUT
When craning, take care that the slings are correctly positioned and are not fouling the
propeller, the sail-drive or a fragile sensor.
Lifting frames should be wide enough, or fitted with spreaders to avoid exerting excessive
lateral pressure on the rubbing band.
Avoid letting slings foul the lifelines. During transport or haulout, the keel should be in
proper contact with its support, and should be taking most of the boat's weight.
Cradle pads must be positioned against structural elements and exert only the pressure
necessary for the boat's good balance.
Whenever the boat is out of the water, use the opportunity to inspect the propeller, rudder,
skin fittings and sensors.