On Sat, 31 Jan 2004 14:59:02 -0500, John H
wrote:
How long can I go without replacing the exhaust manifolds
and risers on my Mercruiser 5.7L?

John H


That depends on whether you use them in fresh or salt water. In fresh
water, you can get by for several years. In salt water, they claim
every 2 years or so, they should at least be checked and/or
cleaned/replaced.

Dave