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474-9550 fits 150 HP Mercury/Mariner 1973-77 models with Serial # 3502806 thru 4868997 as an ignition boat harness. Used to replace worn or failed ignition components in outboard service.
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Part #: 474-9550
Mercury150 HPBoat harnessWeight: 3 lb
4.0 / 5  (17 votes)
474-9550 fits 150 HP Mercury/Mariner 1973-77 models with Serial # 3502806 thru 4868997 as an ignition boat harness. Used to replace worn or failed ignition components in outboard service.

Notes:

20' harness length and includes 6' battery lead.

List Price: $362.69
Your Price: $330.05
Normally In Stock

In Stock items ship same day if ordered before 3PM CST (excluding weekends and holidays)

Replaces OEM#'s

84-822253T20

Product Details

Built for reliable marine electrical-system operation, this boat harness supports dependable signal transfer between the engine harness, control box, ignition switch, and gauges.

Matched OEM-style connectors and color-coded marine-grade wiring help simplify installation and support accurate electrical-system routing during replacement.

Features

  • Matched OEM-style engine harness connectors
  • Supports remote control and gauge integration
  • Color-coded marine-grade wiring
  • Designed for dependable marine electrical-system connectivity

Common Symptoms of a Failing Boat Harness

  • Ignition-switch or accessory wiring issues
  • Intermittent gauge or control-box operation
  • Unstable engine-to-control-box electrical connectivity
  • Corroded or damaged harness connectors

Need Fitment Help?

Tell us your brand, horsepower, and part number. We can help verify fitment before you order.

Support PDF files appear on this page when available.