Exhaust Manifold For MerCruiser 4.3 4.3L V6 99746A8, 99746A17, 18-1952-1, 51220

Exhaust Manifold for MerCruiser 4.3L V6

This exhaust manifold is a direct-fit replacement for MerCruiser 4.3L V6 engines, directing exhaust gases away from the cylinders to maintain engine performance and reduce noise; OEM cross-reference numbers 99746A8, 99746A17, 18-1952-1, and 51220 ensure compatibility with many MerCruiser models.

Overview

This exhaust manifold for MerCruiser 4.3L V6 engines is a robust cast-iron component designed to channel exhaust gases efficiently. It serves as a critical part of the cooling and exhaust system, ensuring your MerCruiser stern drive runs smoothly. Ideal for boat owners and marine mechanics, this exhaust manifold replacement restores performance and reliability.

Built For Performance

• Cast-iron construction for durability and heat resistance
• Precision-matched ports for optimal exhaust flow
• Corrosion-resistant coating for marine environments
• Direct bolt-on installation using OEM-style gaskets
• Engineered to meet or exceed OEM specifications

Fits These Machines

• for MerCruiser 4.3L V6 (1991-2000 approximate)
• for MerCruiser 4.3LX Alpha One
• for MerCruiser 4.3LX Gen II

On-The-Job Use

• Replacement on MerCruiser stern drive boats
• Restoration of exhaust system on older 4.3L V6 engines
• Marine engine rebuilding projects

Specs At A Glance

Good To Know

Q: Will this exhaust manifold fit a MerCruiser 4.3L MPI engine? A: This manifold is designed for carbureted and TBI 4.3L V6 engines; MPI models may use a different casting, so verify your engine serial number.

Q: Do I need to replace the gaskets when installing this manifold? A: Yes, always use new gaskets (not included) to ensure a proper seal and prevent exhaust leaks.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.