MerCruiser Exhaust Riser Gasket with Restricted Flow | Barr Marine MC47-27-864850 Inboard Transmission Assemblies Installing the Sierra 18-5270 is

Installing the Sierra 18-5270 is a straightforward process for most owners

a ruined day on the water

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MerCruiser Exhaust Riser Gasket with Restricted Flow | Barr Marine MC47-27-864850 Inboard Transmission Assemblies Installing the Sierra 18-5270 isMerCruiser Exhaust Riser to Dry Joint Manifold Gasket with Restricted Flow Barr Marine MC47 27 864850 MerCruiser Exhaust Riser to Dry Joint Manifold Gasket with Restricted Flow For Mercruiser dry joint exhaust applications with one open and one restricted hole Restrictor gasket must be installed on all seawater cooled engines Installed between exhaust manifold and exhaust riser or elbow see attachment Restricted end must be positioned to the seawater