Mercury – 90° Fitting Assembly | Cooling & Pressure Port Hardware | 22-8M0022199

Overview
This 90-degree fitting assembly gives you the proper hardware to connect to the block port on specific Mercury 350 SCI engines. It includes the O-ring, adapter, and elbow you need to make a clean, leak-free turn where straight fittings won’t sit right. On the water, it helps keep the pressure connection tight so readings stay steady and the engine’s cooling system behaves the way it should. It’s a simple, practical kit meant for a very specific serial range.

Key Features
    • Complete 90° Assembly – Comes with the elbow, adapter, and O-ring.
    • Tight, Clean Seal – Designed to prevent leaks at the block port.
    • OEM Threading – Fits Mercury’s factory ports correctly.
    • Durable Marine Hardware – Handles heat, vibration, and pressure.
    • Space-Saving Elbow – Ideal where straight fittings won’t clear.

Engine & Boat Compatibility
    • Mercury 350 SCI
    • Serial range: 1B716557–2B143542
    • Block and pressure-port connections
    • Cooling and pressure-sensor setups

Performance & Practical Benefits
This assembly helps you make a solid, angled connection in tight spots where you can’t run a straight fitting. It seals cleanly and holds up well under vibration, which helps keep pressure readings stable. It’s also a quick fix when the original elbow starts leaking or no longer seals the way it should.

Why Buy OEM
OEM fittings match Mercury’s port size, thread style, and sealing surfaces exactly. They stay tight longer and don’t warp or leak like cheaper hardware. Most boaters stick with OEM here because a poor block-port seal can lead to low or inconsistent pressure readings.

FAQ
1. How do I know this is the right fitting?
If you have a 350 SCI in the listed serial range and need a 90° block-port connection, this is the correct assembly.

2. Does it come with the seal?
Yes—this kit includes the proper O-ring.

3. Do I need thread sealant?
A light, Mercury-approved sealant is fine if recommended for your setup.

4. Anything to check during installation?
Make sure the mating surface is clean and the O-ring is seated correctly.

5. What does a failing fitting look like?
You may see small leaks, inconsistent pressure readings, or a fitting that loosens over time.