model04005
manufacturer
Weight:21,48 kg

Z-drive upper part 1.81 for Mercruiser Alpha One Gen.2, MD1547-861063A8

Lieferung Fri 21. Aug - Tue 25. Aug 2026 **
24 months statutory warranty

Ready-to-install Z-drive upper part with 1.81:1 ratio for Mercruiser with 4.3L and 4.3LX engine.
Mercruiser ref. no. 1547-861063A8

Z-drive upper part 1.81 for MerCruiser Alpha One Gen 2 - OEM-compatible, pre-assembled & reliable

The MD1547 s terndrive top section with a ratio of 1.81:1 is the ideal solution for MerCruiser Alpha One Gen II sterndrives (from model year 1991). It completely replaces the original OEM 861063A8 upper water part and ensures efficient, vibration-free power transmission - perfect for repair or replacement.

Technical specifications:

  • Gear ratio: 1.81:1 - ideal for V6 engines and powerful 4-cylinder engines

  • OEM compatible with: 861063A8

  • Suitable for: MerCruiser Alpha One Gen 2 engines (from 1991)

  • Supplied pre-assembled: including shift mechanism, intermediate bearing, oil line, seals

  • Housing: High-quality aluminum alloy, seawater-resistant & powder-coated

Product benefits at a glance:

  • Quick installation - 100% accurate fit and compatible with original lower parts

  • Robust design - for heavy-duty maritime operation

  • Durable components - low-maintenance and corrosion-resistant

  • Optimum torque transmission - for sporty driving performance and high reliability

Recommended use:

The topwater part with 1.81 gear ratio is ideal for MerCruiser applications where a balance of torque and speed is required - e.g. planing boats, sports boats and fishing boats.

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