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For 10 HP Mercury/Mariner 1997-2005 models with Serial # OG760300 thru OG800999, 174-5721 is an ignition stator. Helps maintain stable spark energy across the operating range.
Brand or product appearance may vary slightly depending on current inventory.

Part #: 174-5721
Mercury10 HPStatorWeight: 2 lb
4.0 / 5  (21 votes)
For 10 HP Mercury/Mariner 1997-2005 models with Serial # OG760300 thru OG800999, 174-5721 is an ignition stator. Helps maintain stable spark energy across the operating range.
List Price: $209.39
Your Price: $190.55
Normally In Stock

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

Replaces OEM#'s

855721A, 855721A4, 855721T, 855721T8

Product Details

This stator assembly is built to help the ignition system maintain clean spark delivery by supplying consistent electrical output as the flywheel rotates. The design priorities are especially important on Mercury/Mariner applications where ignition stability depends on clean stator output.

Design & Materials

  • The coil assembly is built to resist breakdown from heat, oil mist, humidity, and repeated thermal expansion.
  • Marine-grade lead wires and molded connectors help maintain dependable contact in a high-vibration environment.
  • Sealed construction helps reduce moisture intrusion that can lead to weak spark or no-spark conditions.
  • The stator body is designed to maintain proper coil alignment under continuous flywheel rotation.

Operating Features

  • Helps correct intermittent spark loss caused by heat-sensitive stator windings.
  • Engineered to meet OEM-style electrical output characteristics.
  • Helps the ignition system recover from weak output, hard starting, and cylinder drop-out symptoms.
  • Provides a dependable electrical source for the ignition system under real-world boating conditions.

Problems a Weak Stator Can Cause

  • Unstable ignition output
  • High-rpm breakup
  • Spark loss after warm-up
  • Engine misfire under load
  • Poor acceleration caused by weak ignition energy

Because stator failure can mimic other ignition problems, testing the trigger, coils, switch box or power pack, and related grounds is recommended.

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.