Dufour Yachts 500 Grand Large, Owner'S Manual

Page: 21 / 78

ENGLISH 26-02-2013
21/78 DUFOUR 500 Grand Large
V
V
I
I
I
I
I
I
.
.
E
E
N
N
G
G
I
I
N
N
E
E
Regular maintenance must be carried out in accordance with the engine manufacturer’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.
General precautions
ATTENTION!
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.
After first launching and tensioning of rigging, check the alignment of the propeller shaft or
the sail-drive flange ring.
● Ensure that the ventilation orifices (vents, engine ventilation grilles) are clear.
● 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.
Place the throttle in neutral before starting the engine in order to prevent boat movement
and/or rotation of the propeller.
On subsequent launches, a brief check of propeller fixing can be made. Incorrect operation of
the folding propeller will lead to vibration
Regularly check the condition of the anodes and ensure that they are suitable for the boat’s
environment (fresh water, salt water). Change the anodes every year. The 3 anodes have an
average life of 1–2 years.
These anodes are made of zinc. It is essential not to use magnesium ones. Impressed current
cathodic protection systems should not be used
If the anodes are not eroded, you need to check:
- that they have not been painted over,
- that they are correctly fixed and in contact with the hull,
- and that they are indeed made of zinc.
Exhaust gas emissions
DANGER!
Internal combustion engines produce carbon monoxide. Prolonged exposure to exhaust
gasses can have serious consequences, and may even cause death.
Safety
DANGER!
In order to avoid all risk of serious injury from the propeller, the engine must not running
when there are people swimming near the boat.
Whenever possible, the engine must be stopped for any engine maintenance or checking
operations. If this is impossible, then particular care must be taken with moving parts
(propeller shaft, belts, etc.) to avoid any danger of injury.