ENGLISH 11-07-2023 21/95 DUFOUR 41
VIII. ENGINE
The engine must be serviced on a regular basis according to the engine manufacturer’s
instructions. Read carefully the engine operating manual supplied with the boat. If you have any
questions, contact your agent or a qualified professional.
General precautions
CAUTION!
Do not use the sails and engine together if the heel angle exceeds10°.
Any modification of the engine must be in keeping with the boat’s capabilities and be carried out
by an engine manufacturer that specialises in marine engineering.
After the first launch and tensioning of the rigging, check that the propeller shaft and the sail
drive flange ring are properly aligned.
● Make sure that the ventilation ports (vent, engine ventilation grille) are clear.
● Make sure that the cooling circuit’s water inlet valve is open, and that water is exiting the
engine exhaust.
● Boats fitted with stern glands with rotary seals: bleed the air in the stern gland each time the
boat has been taken out to sea.
Place the throttle in neutral before starting the engine to prevent any sudden movement of the
boat and/or rotation of the propeller.
On subsequent launches, it is advisable to make a brief inspection of the propeller attachment.
Incorrect propeller operation will cause the boat to vibrate.
Check the condition of the anodes on a regular basis and make sure that they are suited to the
sailing environment (fresh water, seawater). Change the anodes every year. The average lifetime
of the 3 anodes is 1 to 2 years.
These anodes are made of zinc. Never use magnesium anodes under any circumstances.
Impressed current cathodic protection systems are forbidden.
If the anodes are not eroded, you will have to check:
- whether they have been painted over,
- whether they are correctly attached,
- whether they are actually made of zinc.
Exhaust gas emission
DANGER!
Combustion engines produce carbon monoxide. Prolonged exposure to exhaust gases can
have serious or even fatal consequences.
Safety
DANGER!
When people are swimming near the boat the engine must be switched off to avoid risks of
serious injury from the propeller.
Where possible, the engine must be stopped when carrying out any maintenance operation or
engine inspection. If this is not possible, special care must be taken when close to moving parts
(propeller shafts, belts, etc.) so as to avoid risks of injury.
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