Mercury – Fuel Line Connector | Fuel System Component | Bayonet-Style Brass Fitting | 30185T3

Overview

Keeping steady fuel delivery is crucial for older outboards, and the Mercury Marine 30185T3 Fuel Line Connector is made to do exactly that. Designed for Mercury and Mariner TwoStroke outboards built in 1971 and earlier, this bayonet-style connector provides a snug, leak-free fit between your fuel tank hose and the engine. It locks in firmly, holds under vibration, and keeps fuel flowing evenly so your vintage outboard runs like it should — smooth, clean, and reliable.

Key Features

• Purpose: Connects your portable fuel tank hose to Mercury and Mariner TwoStroke outboards.
• Design: Bayonet-style twist-lock connector for easy, secure attachment.
• Material: Built from marine-grade brass and reinforced composite for corrosion resistance and long life.
• Performance: Maintains consistent fuel pressure for clean starts and reliable engine performance.
• Compatibility: Fits Mercury and Mariner TwoStroke outboards 1971 and older, except Mercury 3.9–9.8HP.
• Ease of Use: Quick to install, easy to disconnect, and tested to handle fuel and marine exposure.

Engine & Boat Compatibility

• Designed for Mercury and Mariner TwoStroke outboards built in 1971 and earlier.
• Not compatible with Mercury 3.9–9.8HP outboards.
• Commonly used on classic aluminum boats, vintage fishing rigs, and small runabouts.
• Works reliably in freshwater and saltwater conditions.

Performance & Practical Benefits

The 30185T3 connector makes sure your outboard gets a steady, uninterrupted fuel supply. Its twist-lock design clicks securely into place, preventing leaks and air intrusion that can cause rough running or hard starts. The precision-machined brass fitting keeps fuel flowing cleanly, while the composite housing resists corrosion, even after years of use around salt and fuel.

Once installed, it provides that confident, firm connection that every boater wants — no leaks, no fuel smell, just reliable performance and peace of mind when you hit the water.

Why Buy OEM

With classic Mercury outboards, fit and precision matter. The Mercury 30185T3 is a genuine OEM connector, built to the exact standards of the original fittings used on older engines. Aftermarket options can fit loosely, leak under pressure, or corrode quickly.

Mercury’s OEM design locks in tight, seals properly, and holds up to the vibration and conditions of real marine use. If you’re keeping a vintage outboard alive, it’s the kind of detail that keeps it running the way it did when it was new.

FAQ

Q1: Which engines will this fit?
It fits 1971 and older Mercury and Mariner TwoStroke outboards, excluding 3.9–9.8HP models.

Q2: How does the connector attach?
It uses a bayonet-style twist-lock mechanism that provides a tight, quick connection to your fuel hose.

Q3: Is it compatible with ethanol-blended fuel?
Yes. It’s made from materials that resist ethanol damage and maintain sealing performance.

Q4: Why replace the old connector?
Over time, older connectors can corrode or lose their grip, causing fuel leaks or weak flow.

Q5: Why choose Mercury OEM instead of universal fittings?
Mercury’s OEM connector is precision-built for proper sealing and long-term reliability on older models — no leaks, no guesswork.