Keith wrote:
Have the manifolds and risers pulled and inspected. At that age, if they
haven't been replaced they probably need it. Neglecting this little item
will dump water into your engine, causing an untimely death.

Talking this over with a longtime boat mechanic/dealer friend of
mine, he said that this is primarily a concern with sal****er I/O's
which pump sal****er to cool the manifolds. According to him, in
freshwater it isn't a problem.

Has anyone running a Mercruiser in freshwater had the problem of the
Manifold and risers rusting through allowing water to be pumped onto
the exhaust valve? If so, I'd really like to hear about it before it
happens to me!

Don W.