Mercury – Quicksilver Head Gasket | Engine Seal | V8 MerCruiser & GM Inboard | 75611001

Overview

A solid head gasket keeps your engine’s compression strong and fluids where they belong. The Mercury Marine 75611001 Quicksilver Head Gasket is built for V8 MerCruiser sterndrive and inboard engines made by General Motors, including the 283, 305, 327, 350, and 377 CID blocks. It also fits certain OMC inboard and sterndrive engines of the same size. Crafted to Mercury’s original specifications, it provides a perfect seal between the cylinder head and block, holding up against heat, pressure, and corrosion that come with marine use.

Key Features

• Purpose: Seals the cylinder head and block to maintain compression and prevent coolant or oil leaks.
• Material: Multi-layer marine-grade composite with reinforced metal core for heat and pressure resistance.
• Design: Engineered to fit GM-built MerCruiser V8 engines for a tight, reliable seal.
• Performance: Maintains proper combustion, cooling flow, and long-term durability.
• Durability: Resists corrosion, thermal breakdown, and gasket blowout under heavy load.
• Ease of Installation: Direct OEM fit; torque to spec following your service manual.

Engine & Boat Compatibility

• V8 MerCruiser sterndrive and inboard engines by GM:
• 283 CID
• 305 CID
• 327 CID
• 350 CID
• 377 CID
• Also compatible with OMC sterndrives and inboards using similar GM blocks.

Performance & Real-World Benefits

The 75611001 gasket locks in compression and separates coolant and oil passages, ensuring your V8 runs cool and smooth. Marine engines face more heat and load than automotive versions, which is why this gasket is designed with extra reinforcement for stability and longevity.

It prevents leaks, protects against warping, and restores compression if your old gasket has failed. The result is reliable power, cleaner operation, and reduced risk of overheating.

Why Choose Mercury OEM

The Quicksilver 75611001 is a true Mercury Marine original, designed to fit perfectly on GM-based MerCruiser engines. Aftermarket gaskets can vary in thickness or material, which can lead to poor sealing, leaks, or pressure loss.

Mercury’s OEM gaskets are pressure-tested and made with the same materials used in factory engine builds. They’re built for marine heat cycles and saltwater exposure, ensuring lasting protection and consistent performance.

FAQ

Q1: Which engines does it fit?
It fits V8 GM-built MerCruiser engines — 283, 305, 327, 350, and 377 CID — and select OMC engines of the same size.

Q2: What materials is it made from?
A multi-layer composite gasket with reinforced metal for heat and corrosion resistance.

Q3: What’s the main benefit?
It keeps compression strong and prevents coolant or oil leaks between the head and block.

Q4: How is it installed?
Use your service manual’s torque pattern and specifications for proper sealing.

Q5: Why OEM instead of aftermarket?
Mercury OEM gaskets ensure perfect fit, consistent sealing, and long-term reliability in marine environments.