Mercury – Quicksilver Exhaust Elbow | Exhaust System Part | In-Line 6-Cylinder MerCruiser Engines | 76351A04

Overview

If you’re bringing an older MerCruiser back to life, this is one of those parts that makes a real difference. The Mercury Marine 76351A04 Quicksilver Exhaust Elbow is built to factory specs for MerCruiser in-line six-cylinder engines, including the 140 (1966–1982), 470 (1976–1977), 165, and 200 models. It’s tough, reliable, and designed to handle the constant heat, water, and vibration that come with life in a marine engine compartment. Once installed, you’ll notice a smoother exhaust flow and quieter, more efficient running — just like these engines were meant to sound when they were new.

Key Features

• Purpose: Channels exhaust gases safely out of the engine while maintaining cooling flow.
• Build: Made from thick marine-grade cast metal that resists cracking, rust, and corrosion.
• Fit: Machined to exact OEM tolerances for a snug, leak-free fit.
• Performance: Keeps backpressure balanced for consistent power and smoother idle.
• Durability: Designed to handle long-term heat cycles and saltwater exposure.
• Ease of Use: Bolts directly into place using your existing hardware — no modification needed.

Engine & Boat Compatibility

• MerCruiser in-line six-cylinder engines:
• 140 (1966–1982)
• 470 (1976–1977)
• 165
• 200

Performance & Real-World Benefits

The 76351A04 elbow keeps your exhaust system working the way it should — steady, quiet, and dry. Old elbows often rust from the inside out, leading to leaks or water creeping back into the cylinders. Replacing yours brings back peace of mind and helps your motor breathe freely again.

It’s built heavy, so it holds its shape and seal even after years of use. Whether you’re restoring a classic cruiser or keeping a workhorse MerCruiser going strong, this part gives you reliability you can feel every time you fire up the engine.

Why Choose Mercury OEM

The Quicksilver 76351A04 comes straight from the same people who designed your engine, so the fit and flow are perfect. Aftermarket elbows can look close but may not line up right or use lower-grade metal that won’t stand up to marine conditions.

Mercury OEM exhaust parts are engineered and tested to handle the constant temperature swings, vibration, and salt exposure found on the water. Choosing OEM means no guesswork — just a part that fits right, lasts long, and keeps your boat running like it should.

FAQ

Q1: What engines does it fit?
It’s made for MerCruiser 140 (1966–1982), 470 (1976–1977), 165, and 200 in-line six-cylinder engines.

Q2: What does it do?
It connects your exhaust manifold to the riser, routing gases out while keeping the cooling water moving.

Q3: How can I tell if mine needs replacement?
Look for signs of corrosion, cracks, leaks, or rust streaks — all signs the elbow is failing.

Q4: What’s it made of?
A heavy-duty marine cast metal, treated to withstand high heat and exposure to water.

Q5: Why OEM?
OEM parts fit better, last longer, and keep your MerCruiser performing the way Mercury designed it to.