The Quicksilver 99746A17 is a genuine OEM exhaust manifold kit designed for GM-built V6 229 and 262 CID (4.3L) MerCruiser sterndrive and inboard engines produced from 1985 through 2002. This single manifold installs on either the port (left) or starboard (right) side, making it a versatile replacement for water-cooled wet-joint applications.
Built to Mercury Marine's original equipment standards, this cast-iron manifold features a protective coating on both the internal coolant passages and exterior surfaces to resist corrosion in harsh freshwater and saltwater marine environments — a critical advantage over uncoated aftermarket alternatives.
Key Features:
- Fits port or starboard side — one part number covers both sides
- Designed for GM V6 229 & 262 CID (4.3L) MerCruiser engines, model years 1985–2002
- Protective coating on internal coolant passages and exterior finish for corrosion resistance
- Wet-joint (water-cooled) design — not compatible with dry-joint manifold configurations
- Complete kit includes gasket, drain plug, o-ring, and drain elbow — no additional hardware required
- Genuine Quicksilver OEM part backed by Mercury Marine engineering standards
Cross-Reference Part Numbers: Supersedes 99745, 99746, 99746A8. Also cross-references Barr Marine MC-1-99746, GLM 51220, Sierra 18-1952-1, Mallory 9-40505, and Osco 9745.
As the premier supplier of Mercury Marine original equipment replacement parts, Quicksilver delivers the fit, finish, and durability that aftermarket parts simply cannot match. Replacing a failing or corroded exhaust manifold with a genuine Quicksilver unit ensures proper sealing, reliable coolant flow, and long-term engine protection.