Mercury – Quicksilver Fuel Line Connector | Fuel System Component | Cast Aluminum | 30635Q3

Overview

If you run an older Mercury or Mariner outboard, you know reliability starts with a good fuel connection. The Mercury Marine 30635Q3 Quicksilver Fuel Line Connector is made for vintage 3.9–9.8HP outboards (1971 and earlier) and brings back that solid, dependable seal your motor was built for. This cast aluminum twist-lock connector attaches your fuel hose to the motor securely, keeping air out and fuel moving freely. It’s tough, corrosion-resistant, and built to handle real boating conditions — season after season.

Key Features

• Purpose: Connects your portable fuel hose to older Mercury or Mariner outboards.
• Material: Made from cast aluminum, chosen for strength and long-term resistance to corrosion.
• Design: Twist-lock connection provides a snug, easy-to-use, leak-free seal.
• Fitment: Comes with a threaded fuel line end fitting that screws into the connector body.
• Performance: Ensures consistent fuel delivery for smoother starts and better throttle response.
• Compatibility: Fits Mercury and Mariner 3.9–9.8HP outboards built in 1971 or earlier.

Engine & Boat Compatibility

• Designed for vintage Mercury and Mariner 3.9–9.8HP TwoStroke outboards.
• Common on small aluminum fishing boats, portable rigs, and classic utility outboards.
• Works in both saltwater and freshwater, standing up to long-term exposure.
• Ideal for restoring or maintaining classic Mercury portable fuel systems.

Performance & Practical Benefits

The 30635Q3 connector keeps your fuel system tight and reliable. Its twist-lock fitting locks in firmly, preventing fuel leaks and air intrusion that can cause rough running or hard starts. The cast aluminum construction gives it the strength to handle vibration and the corrosion protection needed for years on the water.

It’s built for the kind of use older motors see — frequent connecting and disconnecting, long days in the sun, and exposure to fuel and spray. Once installed, it feels secure, fits right, and restores that smooth, steady fuel flow your classic Mercury needs to run its best.

Why Buy OEM

When you’re working with an older Mercury engine, precision and quality matter more than ever. The Quicksilver 30635Q3 is a genuine Mercury Marine part, built exactly to the original design specs. That means the twist-lock mechanism fits perfectly, the threads line up cleanly, and the connection seals without leaks.

Aftermarket connectors often use softer metal or looser tolerances, which can lead to poor sealing or short lifespan. Mercury’s OEM parts are made for real marine use — tough enough for salt, fuel, and vibration — so you can trust that every connection will hold tight.

FAQ

Q1: What engines will this fit?
It fits Mercury and Mariner 3.9–9.8HP TwoStroke outboards built in 1971 or earlier.

Q2: Is the fuel line fitting included?
Yes — the threaded end fitting is part of the connector.

Q3: What makes it different from modern connectors?
This part uses the twist-lock bayonet design specific to early Mercury fuel systems.

Q4: Can I use it in saltwater?
Yes, the cast aluminum body is corrosion-resistant and built for saltwater use.

Q5: Why OEM instead of aftermarket?
OEM parts guarantee exact fit and sealing — no leaks, no misalignment, just the performance your vintage Mercury was built for.