Marine Exhaust Manifolds, Marine Manifolds, Marine Exhaust Manifold, Marine Aluminum Exhaust Manifolds

Question: I need to replace my Mercruiser 3.0L marine exhaust manifold but cannot seem to locate the same matching part number. Why can’t I find the same replacement “cast iron” exhaust manifold part number for my Mercruiser 3.0L marine engine? Response: Mercruiser has made numerous changes to the 3.0L exhaust manifolds over the past 15 years. This has […]

Have you ever wondered what exhaust risers/spacers were for? Or have you ever wondered why you continue failing marine engines from water ingestion? Here’s the techncial article that addresses this topic in detail and may save you from replacing the engine in your boat yet another time. Read More…

Have you ever wondered if installing a Thru Hull Marine Exhaust system would help your Marine Engine’s performance? Or if you’re the boater that’s always dreamed of having that performance engine “Rumble” when you feel the urge but want it quiet when you want to talk to your passengers then this is the video that explains how […]

Warm versus cold manifold refers to the temperature of the cooling water that is introduced into the exhaust manifolds on a marine cooling system. This specific system feature can apply to raw water (also known as open cooling) systems as well as Fresh Water (also known as closed cooling) systems. The benefit of warm manifolds deals […]

The short answer is yes in most cases reducing engine exhaust back pressure WILL improve the overall level of performance and can also improve the life expectancy of the engine. I’m asked on a regular basis as to what upgrade options are available for 4.3L and 5.0L engines specifically. In most cases the best starting […]