Mercruiser 5.7 - Manifold and Riser Replacement Guide

The Big Chill: Tackling Your Mercruiser 5.7 Exhaust Manifold and Riser Replacement There's nothing quite like the feeling of being out on the water, the sun on your face, the hum of your engine a steady companion. But let's be real, that peace of mind often comes from knowing you've taken care of the necessary maintenance. And if you own a Mercruiser 5.7, a true workhorse of an engine that's powered countless adventures, there's one particular job that will inevitably come calling: the Mercruiser 5.7 exhaust manifold and riser replacement. It might sound daunting, a bit like open-heart surgery for your boat, but with the right approach and a little elbow grease, it's a perfectly manageable project for a dedicated DIY boater. ...

December 14, 2025 · 9 min · Lorene Paulo