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Chapter 8
Inspect the thru-hull seacocks before each outing. Make
sure the connections between the output hose and the
valve are tight. Look for water leaks around the area where
the valve and hull meet.
Every 30 days open and close each thru-hull valve several
times. This will guard against the valve seizing in the open
or closed position. Also, make sure the valve handle is
tightly fastened. Secure any loose valve handles.
TYPICAL SEACOCK
OPEN
POSITION
CLOSED
POSITION
HANDLE
IN-LINE
Before servicing the sea water strainer make sure the
appropriate seacock has been closed to prevent water from
entering the boat. If possible blow out the strainer basket
with compressed air or use a metal type brush to remove
any accumulated material from the screening material.
Check all parts for wear and possible leaks including any
O ring surfaces. Lubricate O ring with waterproof product
available at many box or pool stores. Do not overtighten
the strainer hold down fastener which could cause strainer
body damage especially on the newer plastic versions. Use
original replacement marine parts only. After all parts are
reassembled open the seacock and check for leaks.
Notice there is a drain hole in the bottom of the strainer
body.
UNDERWATER HARDWARE-SEACOCKS &
STRAINERS
TYPICAL STRAINER
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