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174-5721 is an ignition stator built for 6 HP Mercury/Mariner 1997-2005 models with Serial # OG760300 thru OG800999. Helps maintain stable spark energy across the operating range.
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Part #: 174-5721
Mercury6 HPStatorWeight: 2 lb
3.0 / 5  (8 votes)
174-5721 is an ignition stator built for 6 HP Mercury/Mariner 1997-2005 models with Serial # OG760300 thru OG800999. 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

855721A4, 855721T8

Product Details

This marine stator assembly is engineered to generate the electrical energy needed for dependable CDI ignition performance across changing engine speeds. The design priorities are especially important on Mercury/Mariner applications where ignition stability depends on clean stator output.

Construction Details

  • Sealed construction helps reduce moisture intrusion that can lead to weak spark or no-spark conditions.
  • Heavy-duty winding insulation helps prevent shorting between coil layers during extended operation.
  • The coil assembly is built to resist breakdown from heat, oil mist, humidity, and repeated thermal expansion.
  • Precision-wound copper coils are used to promote efficient voltage generation and stable output.

Operating Features

  • Helps correct intermittent spark loss caused by heat-sensitive stator windings.
  • Designed for use in wet, hot, and vibration-heavy marine engine compartments.
  • Designed to maintain stable voltage as engine load and RPM change.
  • Helps restore ignition charge voltage for strong, repeatable spark output.

Failure Symptoms to Check

  • Hard starting
  • Unstable ignition output
  • No-start conditions
  • Charging output problems where the stator also supports charging circuits
  • Weak or intermittent spark

For best results, stator output should be verified with the proper service-manual resistance and DVA voltage tests before installation.

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.