Mercury – Quicksilver Exhaust Manifold Elbow | 4" OD, 7° Down Angle | For V6 & V8 MerCruiser Engines | 807988A03

Overview

The Mercury Marine 807988A03 Quicksilver Exhaust Manifold Elbow is built to keep your MerCruiser engine breathing freely while standing up to the harsh marine environment. Designed for V6 and V8 MerCruiser sterndrive and inboard engines made by General Motors (2002 and older), this OEM elbow connects to a center-rise exhaust manifold and features a 4-inch outlet with a 7° down angle. Its heavy-duty cast construction is hot-dipped and top-coated for superior corrosion resistance, making it equally reliable in freshwater or saltwater applications. When it’s time to replace a rusted or leaking elbow, this Quicksilver part restores the performance, protection, and dependability your engine deserves.

Key Features

• Purpose: Replaces corroded or leaking exhaust elbows to maintain safe, efficient exhaust flow.
• Fitment: Designed for V6 and V8 MerCruiser engines (2002 and older) with center-rise exhaust manifolds.
• Specifications: 4-inch outside diameter, 7° down-angle outlet.
• Durability: Hot-dipped and top-coated for maximum corrosion resistance.
• Use: Safe for freshwater or saltwater installations.
• OEM Quality: Built to Mercury’s exact engineering standards for precise fit and long-term performance.

Engine & Boat Compatibility

• V6 and V8 MerCruiser sterndrive and inboard engines made by General Motors (model year 2002 and older)
• For engines with center-rise exhaust manifolds

Performance & Real-World Benefits

The 807988A03 exhaust elbow helps channel exhaust gases safely out of your engine while keeping water from backflowing into the cylinders — a key defense against internal corrosion and costly repairs. Over time, elbows can rust, crack, or clog with scale buildup, restricting flow and reducing performance.

This Mercury OEM elbow restores optimal flow and sealing, helping your engine run cooler and more efficiently. Its 7° down-angle design directs exhaust smoothly and reduces backpressure, while the hot-dipped coating provides years of protection from rust and salt exposure. Whether you’re replacing one side or both, this part is built for easy installation and long-term reliability.

Why Choose Mercury OEM

The Quicksilver 807988A03 is a genuine Mercury Marine component, built from marine-grade materials and engineered specifically for your MerCruiser engine. Aftermarket elbows may use thinner castings or inadequate coatings that corrode quickly in saltwater or fail to align properly with your manifold.

Mercury’s OEM design ensures proper flow geometry, gasket fit, and corrosion protection — the same quality trusted on factory-installed exhaust systems. It’s durability you can count on every time you start your engine.

FAQ

Q1: What engines does this fit?
It fits V6 and V8 MerCruiser sterndrive and inboard engines (2002 and older) with center-rise exhaust manifolds.

Q2: What are the dimensions?
It has a 4-inch outlet with a 7° down angle.

Q3: Can it be used in saltwater?
Yes — it’s hot-dipped and top-coated for superior corrosion resistance in both freshwater and saltwater.

Q4: When should I replace my exhaust elbow?
If you notice rust, cracks, leaks, or reduced performance, it’s time for a replacement.

Q5: Why OEM over aftermarket?
Because Mercury OEM elbows ensure proper flow, alignment, and durability — protecting your engine and preserving its performance for the long haul.