Volvo Penta 22 Series Instruction Book page 37

Vacuum valve. Cleaning
Some engines have a vacuum valve installed in the
seawater piping. Disassemble the valve. Unscrew the
hexagonal cover. In the cover there is a membrane
and a gasket. Clean all the parts. Turn the cover
upside down. Install the membrane first and then the
gasket. Turn the valve housing upside down as well.
Screw the cover into position, but not too hard (0.2
kpm), or the valve may stop working.
Seawater filter. Cleaning
1
The seawater filter is only standard on engines with
2
SX-drive.
If the boat is used in water that has a lot of
contaminants, seaweed etc. the filter must be
checked more frequently than indicated in the
3
maintenance schedule. Otherwise there is a risk the
filter will clog and the engine will overheat.
Screw off cover (1) and remove seal plate (2). Lift out
and clean the insert (3).
WARNING! Risk for water penetration. Close the
seacocks.
WARNING! Stop the engine before removing the
cover on the seawater filter.
37