Quicksilver – Exhaust Manifold | V8 MerCruiser Series | E-Coated Cast Iron | 860246Q11

Overview

If you’ve ever rebuilt part of a MerCruiser V8, you know the relief that comes when everything bolts together smoothly and the engine fires with that familiar, steady rumble. When replacing the manifold, you want a part that quietly does its job, season after season. This Quicksilver manifold gives you exactly that feeling — a sense of security that your engine is sealed, cooled, and breathing the way it was meant to. For boats that have been in the family a long time, it’s the kind of part that keeps the legacy going.

Key Features

• Cast iron exhaust manifold for MerCruiser V8 engines made by General Motors
• E-coated interior and exterior for corrosion resistance
• Fits 305, 350, and 377 cubic inch engines from 1983–2002
• Includes gasket for proper sealing
• Intended for freshwater applications
• Quicksilver part number 860246Q11

Engine & Boat Compatibility

• Designed for MerCruiser sterndrive and inboard engines using GM-based V8 platforms
• Compatible with 305, 350, and 377 cubic inch engines
• Suited for runabouts, older cruisers, bowriders, and classic performance boats
• Best for freshwater operation, though inland salt-free lakes are ideal

Performance & Practical Benefits

The E-coat finish stands out immediately. It feels smooth and sealed, giving you confidence that the manifold is protected from the inside out. When installed, the manifold delivers stable temperatures, clean exhaust flow, and a tight, secure fit that makes the whole engine feel more controlled.

You’ll notice steadier idle quality, fewer exhaust leaks, and a cleaner tone under acceleration. These V8s respond well to a properly sealed manifold, and this OEM part helps restore that crisp throttle response many older engines lose over time. The included gasket matches the manifold perfectly, making installation predictable and avoiding the frustration of misalignment or binding found with cheaper alternatives.

Once everything is torqued down, the manifold settles in with that sense of solid reliability — exactly what you want when you’re miles upriver or cruising a quiet lake at sunset.

Why Buy OEM

Aftermarket manifolds often fall short in internal coating quality, casting density, and bolt alignment. This Mercury Marine part avoids all of those issues. It’s built to the engine’s original specifications, ensuring proper flow, cooling balance, and long-term dependability.

Working with OEM components saves time, protects the engine, and reduces the chances of premature failure. It’s the type of decision seasoned boaters make because they know how much difference a precise fit makes on these older V8 platforms.

FAQ

Q1: Which engines does this manifold fit?

It fits 305, 350, and 377 cubic inch MerCruiser V8 engines made by General Motors.

Q2: How is it different from aftermarket options?

Its E-coated interior and exact casting tolerances provide better protection and longer life.

Q3: How do I confirm it’s the correct part?

Check your manual. If your engine requires part number 860246Q11, this is the match.

Q4: Can it be used in saltwater?

It’s intended primarily for freshwater operation.

Q5: Is installation easy for most boat owners?

Yes, especially for owners experienced with V8 manifolds.