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Starter Motor for Mercury/Mariner 40-50 HP Outboards 50-73521

Starter Motor for Mercury/Mariner 40-50 HP Outboards 50-73521

SKU:5399N

Regular price £98.99 GBP
Regular price £140.00 GBP Sale price £98.99 GBP
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New 12V PMDD starter motor designed for Mercury and Mariner 2-stroke outboards, replacing part number 50-73521/5399 for reliable starting performance.

  • Voltage: 12V; Rotation: Counterclockwise (CCW); 10-tooth pinion
  • PMDD (Permanent Magnet Direct Drive) design with precision-machined components and upgraded steel shafts
  • 2-wire connection with ring terminals for secure, corrosion-resistant installation
  • Marine-grade internals featuring high-conductivity materials, corrosion-resistant coatings, and moisture sealing
  • High cranking power ensures dependable starts in all conditions
  • Brand new condition; not rebuilt or refurbished
  • Replaces Mercury 50-73521, LESTER 5399, United Technologies 1097028 (1097028-M030SM), SM10790, SM10970, Sierra 18-5605, Arco 5379, API MOT3007N, Arrowhead SAB0016, J & N 410-21047, WAI 5399N and related parts
  • Compatible with Mercury 2-stroke outboards 29.8-37.3 kW (40-50 HP) from 1976-1997, including Jet and Magnum series; also fits Mariner 2-stroke outboards 29.8-37.3 kW (40-50 HP) from 1980-1997, including Magnum and Jet models

Order this direct-fit, high-performance starter motor for extended life, easy installation, and reliable marine starts.

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Shipping calculated at checkout. Free shipping over £150. Terms apply