4S: Sea Strainers & Through-Hulls
4S1: Sea Strainer Cleaning and Seacocks
The sea strainers on this boat are secure and reliable. They
protect the engine, generator and refrigeration cooling systems
from water-borne debris which might block internal equipment
passages. If a sea strainer needs cleaning (see above regarding
inspection) here is the procedure:
1) Look at the base of the strainer near the hull. On one
side is a valve lever with a relatively long handle; on the
other side is a “T”-shaped knob. Loosen the T-knob two
turns. The valve itself may begin to “weep” sea water, do
not be alarmed.
2) Turn the longer valve lever so it is perpendicular to the sea strainer (parallel to the hull).
3) Tighten the T-handle; the weeping will stop.
4) Using the same spanner you use for the fuel and water tank deck caps, unscrew the top of
the sea strainer. Then remove the strainer by pulling it out the top of the assembly. Rinse the
strainer thoroughly and, if necessary, remove any debris from the glass housing.
5) Reinsert the strainer, tighten the top cover with the spanner, AND TURN THE VALVE BACK
ON C failure to do so will overheat the engine. BE SURE TO TIGHTEN THE T-KNOB ON THE
VALVE SO IT IS SECURE.
This entire operation will take 5-10 minutes at most, and will assure you of cool engines.
A sea strainer; this one is forward of the
starboard engine.
Section 4S: Sea Strainers & Thru-Hulls 4.39
