Mercury – Quicksilver 807988Q03 Exhaust Manifold Elbow | MerCruiser Sterndrive & Inboard | E-Coated Black | 807988Q03

Overview

Every boater knows the quiet confidence that comes from a motor that just hums along — smooth, steady, and reliable. The Quicksilver 807988Q03 Exhaust Manifold Elbow is one of those behind-the-scenes parts that keeps everything running right. Whether you’re throttling up across glassy water or easing back into the marina, this elbow helps your engine breathe cleanly and stay cool.

Built to the same standards as Mercury Marine’s original equipment, it’s designed for MerCruiser V6 and V8 GM-based engines with a center-rise outlet manifold (model year 2002 and older). It’s not flashy, but it’s the kind of part you’ll appreciate every time your boat fires up without a hiccup.

Key Features

• Purpose: Direct OEM replacement elbow that restores proper exhaust flow and cooling performance on MerCruiser sterndrive and inboard engines.
• Fitment: Designed for V6 and V8 General Motors-based MerCruiser engines equipped with center-rise outlet manifolds from 2002 and earlier.
• Specifications: 4-inch outside diameter with a 7-degree down-angle outlet for precise exhaust routing and drainage.
• Material & Finish: Heavy-duty cast construction with a durable E-coated black finish, protecting against rust and corrosion in freshwater environments.
• Design Details: Engineered to Mercury Marine OEM tolerances for perfect alignment, secure sealing, and consistent long-term performance.

Engine & Boat Compatibility

• MerCruiser V6 (GM-based engines)
• MerCruiser V8 (GM-based engines)
• Center-rise outlet exhaust manifolds (2002 and older)
• Common on runabouts, cruisers, and inboard powerboats

Performance & Practical Benefits

In real-world boating, reliability is everything. The 807988Q03 helps maintain the right exhaust back-pressure and cooling balance, keeping temperatures steady and preventing premature wear on the manifold. The 7-degree down-angle improves water drainage after shutdown, helping reduce moisture buildup and internal corrosion.

You’ll feel the difference in how the engine responds — smoother idle, quieter exhaust note, and less worry about overheating. Installation is straightforward, especially for anyone familiar with Mercury systems, and the E-coated finish means this elbow will hold up season after season in freshwater conditions. It’s the kind of peace of mind you only get when you stick with genuine Mercury engineering.

Why Buy OEM

Buying OEM isn’t just about matching part numbers — it’s about trust. Mercury’s OEM components are tested in real marine environments, not just lab conditions. That means better sealing, consistent fit, and no surprises down the line.

When you choose genuine Mercury parts, you’re investing in long-term reliability and performance that keeps your boat where it belongs — on the water, not on the trailer.

FAQ

Q1: Which Mercury engines or systems does the Quicksilver 807988Q03 fit?
A: It’s made for MerCruiser V6 and V8 GM-based sterndrive and inboard engines with center-rise manifolds (model year 2002 and older).

Q2: What makes this part different from aftermarket alternatives?
A: It’s built to Mercury Marine’s exact OEM standards for fit, material quality, and flow design — ensuring long-term reliability.

Q3: How do I know if it’s the correct replacement for my setup?
A: Check that your existing manifold has a center-rise outlet and a 4-inch OD, 7° down-angle elbow — this part will match precisely.

Q4: Can it be used in saltwater?
A: It’s designed for freshwater installations. Saltwater users should choose a corrosion-resistant stainless or special-coated alternative.

Q5: Is installation straightforward?
A: Yes. It’s a direct bolt-on replacement that installs easily with new gaskets and hardware.