See our post "Do it NOW" to the "Things that went wrong" for background info'.
Blocked raw-water intake resulted in seized engine
Trying to motor
out of unsafe harbour, into 60 kt winds.
A small stick entered the intake & stuck in the sea cock, obstructing water
No exterior screen/strainer on hull
When repairing engine
, found the sea-cock to be "stuck", so I forced the handle closed. Ball valve remained open.
Removed hose from sea-cock, & plugged it with wooden cone - went on to repair seized engine. Discovered debris in sea-cock much later, when looking to replace "busted" seacock.
1. Install exterior screen/strainer on raw water
intake. Must have assured cooling water
2. Sometimes "muscle-power" greater than "brain-power" - take it easy, & think it out prior to applying great force. Sometimes a "bigger hammer" is not the answer.