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MerCruiser 4.3 Exhaust Riser Spacer Kits

MerCruiser 4.3 Exhaust Riser Spacer Kits

MerCruiser 4.3 Exhaust Riser Spacer Kits

MerCruiser 4.3 exhaust riser spacer kits from will help you mount your exhaust riser at the proper height. To keep water from potentially backflowing into your marine engine, you need to make sure your riser elbow is at the appropriate height. Spacer kits, or blocks, are designed to add height, usually 3-6 inches, to the riser elbow. For boats where the engine sits lower in the water, this is an important necessity. At, we recommend inspecting and replacing your riser blocks at regular intervals as part of routine MerCruiser exhaust maintenance. You should be inspecting your exhaust system once a year and paying careful attention to joints, gaskets, and any area that might be starting to rust. We recommend replacing saltwater parts every five years. Freshwater engine parts will probably have a longer lifespan, but it pays to keep a close eye on those, too.

MerCruiser Exhaust Riser Spacer Kits

Your MerCruiser 4.3 exhaust is a complex system, and it’s imperative that every part is manufactured to meet exact specifications. Every MerCruiser exhaust riser spacer from is made from high-quality metal and built to fit perfectly with your manifold and riser elbow. In short, they're precision-engineered parts that you can count on.

MerCruiser 4.3 Spacer Block Kit

The spacer block kit from contains all the parts you need to properly elevate your risers, including gaskets and bolts. They’ll elevate the key point where your risers meet the MerCruiser 4.3 exhaust Y-pipes and help keep water from sneaking into your motor. Should your spacer kit need a little TLC between overhauls, we also carry MerCruiser 4.3 gaskets and bolts to meet a large variety of specifications.

Put Your Trust in Premium Parts

At, we know a job done right is a job done with premium parts. Browse our inventory for everything from MerCruiser 4.3 riser elbows to transom assemblies, outdrive parts, and more. With five decades of experience building and rebuilding marine engines, our team has the knowledge and experience to help you find the right part for your engine’s needs. Contact us today if you have any questions about which replacement parts are right for your needs.