Quicksilver 93320A15 3-Inch Exhaust Riser Spacer Kit for MerCruiser V6 & V8

The Quicksilver 93320A15 is a genuine OEM 3-inch exhaust riser spacer kit designed for MerCruiser stern drive engines. This kit raises the exhaust elbow assembly by 3 inches, providing critical clearance between the exhaust system and the bilge waterline — a key factor in preventing water intrusion into the engine through the exhaust ports.

Important: This riser kit is only compatible with stainless steel exhaust elbows. It is not designed for use with cast iron elbows.

Key Features:

• Genuine Mercury Marine / Quicksilver OEM factory part
• 3-inch exhaust riser spacer raises elbow height for improved water protection
• Compatible with GM V6 and V8 MerCruiser stern drive engines
• Fits MCM 4.3L MPI engines (serial #0M300000–0M614999)
• Fits MCM V-8 305, 350, and 377 CID MPI engines (serial #0M300000–0M599999)
• Designed exclusively for use with stainless steel exhaust elbows
• Kit includes riser spacer, mounting bolts, full-flow gaskets, and restricted gaskets

Replacing worn or corroded exhaust risers is an essential part of MerCruiser engine maintenance. Deteriorated risers can allow water to enter the exhaust manifold and ultimately damage the engine. The Quicksilver 93320A15 riser kit ensures a proper OEM-spec exhaust system repair or upgrade. Also referenced as part number 710-93320A15.