Opens in a new tab
GET EXPERT ADVICE
An exploded view of various Muir anchor winch and windlass spare parts, including gears, shafts, and casings.

GEARBOX RMI 85 PP R80 PAINTED PA10

Gearbox RMI 85 PP R80 Painted PA10 | Genuine Marine | Muir AU

The Muir Gearbox RMI 85 PP R80 Painted PA10 is a genuine factory replacement designed for HR4000 Thor horizontal windlasses. Precision-engineered to exact OEM specifications and finished with a durable PA10 paint coating, this unit transmits motor torque to the windlass drive system, delivering controlled speed reduction and heavy torque output for safe, reliable anchor handling.

Built for Marine Conditions

The unit features the proven RMI 85 PP R80 design with a sealed PA10 painted finish for superior corrosion protection in harsh marine environments. Manufactured to Muir's strict quality standards, this gearbox is built to withstand the rigors of constant load cycles, saltwater exposure, and UV degradation, ensuring long-lasting performance season after season.

Key Features

  • Genuine Muir replacement for HR4000 Thor windlasses
  • RMI 85 PP R80 specification
  • Durable PA10 painted finish for corrosion resistance
  • Precision-engineered for exact OEM compatibility
  • Reliable torque transmission under heavy load
  • Direct fit — no modifications required

Why Choose Genuine Muir Parts?

Choosing the authentic Gearbox RMI 85 PP R80 ensures perfect alignment, optimal torque transfer, and long-term reliability. Aftermarket alternatives often use inferior gears and bearings that wear quickly, generate excessive noise, or fail under load — risking damage to your windlass and unsafe anchoring. Trust genuine Muir parts for dependable performance and full warranty support.

Order your replacement gearbox today from Muir Australia — trusted marine engineering since 1968.

Part number: F761053

Fits: HR4000 Thor exploded view

Prices aren’t shown online. Send us the part number and your windlass model and serial number and we’ll confirm fit, price and availability.