Mercury – Speedometer Pickup | Water-Pressure Speed Sensor | 77409A1

Overview
This speedometer pickup is the small transom piece that makes an analog speedometer actually work. It sends water pressure up to the gauge, giving the needle something real to read. When the old pickup gets clogged with sand or cracks after years in the sun, the gauge starts dropping out or sitting at zero. Swapping this in is a quick, low-stress fix that gets your speed readings back.

Key Features
    • Transom-Mount Pickup – Feeds water pressure straight to the gauge.
    • OEM Fit – Matches Mercury’s original pickup shape and port size.
    • Mounting Screws Included – Simple bolt-on install.
    • Tough Housing – Holds up to spray, bumps, and trailering.
    • Clean Signal Feed – Helps the speedometer track smoothly again.

Engine & Boat Compatibility
    • Mercury analog speedometer systems
    • Water-pressure speed pickups
    • Boats with hose-fed speedometer inputs
    • Transom-mounted gauge pickups

Performance & Practical Benefits
With a new pickup in place, the speedometer gets a steady stream of pressure instead of the hit-or-miss feed old pickups give. The gauge stops bouncing, the needle starts moving again, and you can actually tell how fast you’re running. It’s a quick bolt-on job that usually fixes speedometer issues in minutes.

Why Buy OEM
OEM pickups copy Mercury’s original design, so the pressure signal is the right strength and the fit is exact. They last longer in sun and spray than the cheaper look-alikes. Most boaters stick with OEM because it’s one of those parts where the wrong shape or flow can make the gauge useless.

FAQ
1. How can I tell the pickup is bad?
If the speedometer only works sometimes or stays at zero, the pickup is often the culprit.

2. Do I need any extra parts?
Just your existing hose—this kit includes the pickup and screws.

3. Will it hold up in saltwater?
Yes. A quick rinse after each trip helps it last longer.

4. Anything to check before mounting it?
Look at the hose—if it’s cracked or full of grit, clean or replace it.

5. What does a clogged pickup do on the gauge?
You’ll see slow readings, bouncing numbers, or no movement at all.