B&G MHU Cups

Precision Wind Measurement for Peak Sailing Performance

Imagine slicing through choppy waters with unwavering confidence in your wind data. These MHU wind cups transform your masthead sensor into a reliable ally, delivering spot-on wind speed readings that sharpen every tactical decision on the water. Crafted for the relentless marine environment, they stand up to salt spray, UV exposure, and gale-force gusts without skipping a beat.

Unlike stock replacements that wear out after a season of hard racing, these cups feature aerodynamic shaping that minimizes drag and maximizes rotational smoothness. Sailors who've swapped them in report crisper data during tacks and gybes, helping crews nail those perfect laylines every time.

Key Features That Set Them Apart

• Durable Construction: Injection-molded from high-impact, UV-stabilized polymer that resists cracking and fading, even after years exposed to harsh sunlight and saltwater.
• Low-Friction Design: Precision-balanced cups spin freely at the lightest breezes, ensuring accurate low-wind readings crucial for light-air starts.
• Easy Snap-On Fit: No tools needed for installation—simply align and secure to your existing MHU shaft for downtime-free upgrades.
• Optimized Aerodynamics: Three-cup configuration captures wind shifts with minimal inertia, providing responsive data feeds to your B&G displays.
• Proven in Extreme Conditions: Trusted by offshore racers who push limits in the Southern Ocean, where wind cups face 50+ knot blasts and freezing spray.

Why Upgrade Your MHU Wind Cups?

Faded or chipped cups don't just look bad—they throw off your wind speed by up to 20%, leading to mistimed maneuvers and lost races. Fresh cups restore factory-level accuracy, syncing perfectly with your instruments for true apparent and true wind calculations.

Boat owners often overlook wind cups until failure strikes mid-regatta. Proactive replacement keeps your setup calibrated, avoiding costly sensor overhauls. Plus, in club racing or coastal cruising, reliable wind info means safer, more enjoyable sails—spotting puffs early or trimming sails optimally.

Installation Tips from Seasoned Skippers

Prep your masthead on a calm day: Clean the shaft thoroughly to remove corrosion or old adhesive. Slide the new cups onto the shaft, ensuring the set screw aligns with the flat spot. Tighten gently with an Allen key to avoid stripping—torque to snug, not cranked.

Post-install, calibrate your system via the B&G menu: Motor the boat upwind at 6 knots to verify readings against a handheld anemometer. Pro tip: Mark your cups with a tiny dot for rotation checks after heavy weather, catching wear before it affects performance.

"Swapped mine before a 200-mile delivery—wind data was flawless through 40-knot squalls. Night-and-day difference." – Offshore delivery captain

Maintenance for Long-Lasting Accuracy

Annual inspections are key: Rinse with fresh water after every outing to flush salt buildup. Inspect bearings for grit; a drop of light silicone lubricant keeps them spinning true. Avoid petroleum-based oils that attract dirt.

In storage, wrap loosely in a breathable cover to shield from birds and debris. With proper care, expect 3-5 years of top-tier service, outlasting generics that seize after one season.

Compatibility and Real-World Fit

Direct fit for B&G MHU systems, pairing seamlessly with HRU, HCS, and modern Triton2 setups. No adapters needed—engineered as OEM-spec replacements that preserve your warranty and data integrity.

Upgrade path: Works with NAC autopilots for wind-based steering, feeding precise inputs for auto-tack and gust response.

Frequently Asked Questions