"Richard Malcolm" wrote in message
om...
They prevent water rushing up your exhaust and into the engine.
Depending
on the type, replacing them usually is a pretty simple task unless you
have
to replace the whole assembly, including the exhaust pipe. That
involves
removing and replacing the portion of the exhaust pipe that goes through
the
transom.

jps

my boat has an OMC (Ford) King Cobra I/O 351(?) Does that help
anyone to know if it is a simple job. Should I have this done when I
take the boat out for the season?
thanks

That's a good question for your mechanic or someone who knows your
particular situation. Advising you without knowing the situation is dicey
business.