Jeanneau Sun odyssey 509, Owner'S Manual

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Fuel filter
Engine running problems may have different origins, including dirty fuel. The injection pump
may wear out if there is water in the system.
The water results either from the condensation resulting from an insufficiently filled tank, or
from a filler cap either not closed properly or with a damaged seal.
In order to prevent any water infiltration, the fuel runs through two filters:
- One filter is an integral part of the engine, its role is to filter fuel very finely. To know when
you have to intervene and how frequently you have to change it, please refer to the
engine's manual.
- The second filter is on the pipe that links the tank to the engine, it plays the role of a water
decanter and prefilter.
Drain by undoing the knurled screw at the base of the decantation bowl(but not removing it).
Allow to flow into a box till the fuel looks clean.
Do this several times a year.
Change the pre-filter at least once a year (access to it when you remove the bowl).
As for the procedures in case of fire, refer to Chapter 2.
DANGER
- Never obstruct access to the fuel valve.