Mercury – Bulk Water-Pressure Tubing | Speedometer & System Hose | 32-859785100

Overview
This 100-foot roll of gray water-pressure tubing gives you plenty of hose for long rigging runs or full system replacements. It’s the same style of line Mercury uses for water-pressure gauges and speedometer pickups, flexible enough to route cleanly without kinking. Out on the water, fresh tubing helps the gauge read steady instead of fading in and out like old, brittle hose. It’s a simple upgrade that keeps things working the way they should.

Key Features
    • 100 ft Bulk Roll – Enough tubing for full re-rigging or multiple installs.
    • 5/32 OD x 3/32 ID – Standard Mercury-sized pressure hose.
    • Flexible Marine Tubing – Easy to route around tight turns.
    • Durable Gray Material – Holds up to heat, spray, and constant movement.
    • Clean Pressure Path – Helps restore steady gauge readings.

Engine & Boat Compatibility
    • Mercury water-pressure gauges
    • Analog speedometer systems
    • Transom-mount pressure pickups
    • Boats using 5/32 in. tubing runs

Performance & Practical Benefits
Old tubing likes to crack, pinch, or clog, and once it does, the gauge readings start bouncing or dropping out. This bulk roll lets you replace the whole run instead of patching sections. It routes cleanly, stays flexible, and lets the pressure signal travel smoothly from the pickup to the dash. The result is a more settled, accurate reading on the gauge.

Why Buy OEM
OEM tubing matches Mercury’s size and flexibility exactly, which means no loose connections or sloppy fit. It lasts longer in the sun and doesn’t stiffen as quickly as cheaper hose. Most boaters stick with OEM because correct diameter makes a big difference in how the pressure signal behaves.

FAQ
1. How do I know if my tubing needs replacing?
If it’s stiff, cracked, yellowed, or the gauge drops out, the tubing is usually the issue.

2. Can I cut this to length?
Yes—just trim as needed and push it onto the fittings.

3. Is it good for saltwater?
Yes. Rinse the ends and fittings after trips for best longevity.

4. What should I check before installing?
Make sure fittings are clean and the pickup isn’t clogged.

5. What happens when tubing fails underway?
You’ll see slow or dead gauge readings, or the needle will bounce randomly.