855721T8 Mercury Stator | Genuine Used Part

🔧 Product Description

Genuine Mercury / Mariner Small Outboard Stator Assembly - Part Number: 855721T8

A genuine Mercury / Mariner stator assembly used on small 6HP to 25HP two-stroke outboards. This stator mounts under the flywheel and supplies ignition and charging output on compatible two-cylinder XD-series engine families.

⚙️ Key Features

• Genuine Mercury / Mariner stator assembly
• Correct Mercury part number 855721T8
• Related to 855721A4 stator reference
• Used on 6HP to 25HP two-stroke outboards
• Cross-references with CDI 174-5721 replacement family

🚤 Compatibility

Commonly used on

• Mercury / Mariner small two-stroke outboards
• Two-cylinder XD-series charging and ignition systems

Typically suits

• Engine models:
• Mercury 6HP two-stroke applications where 855721T8 is specified
• Mercury 8HP two-stroke applications where 855721T8 is specified
• Mercury 9.9HP two-stroke applications where 855721T8 is specified
• Mercury 10HP two-stroke applications where 855721T8 is specified
• Mercury 15HP two-stroke applications where 855721T8 is specified
• Mercury 20HP two-stroke applications where 855721T8 is specified
• Mercury 25HP two-stroke applications where 855721T8 is specified
• Mariner 6HP / 8HP / 9.9HP / 15HP / 20HP / 25HP two-stroke applications using 855721T8
• Mercury / Mariner 2-cylinder XD two-stroke stator systems using 174-5721 replacement family
• HP Range: 6HP - 25HP
• Engine Type: Mercury / Mariner two-cylinder two-stroke outboard
• Year Range: approximately 1997-2005
• System Type: Stator / charging and ignition source coil assembly

🔌 Function

The stator generates electrical output beneath the flywheel. It supplies ignition energy and charging output needed for spark generation and electrical-system operation.

⚠️ Common Signs of Failure

• Weak or missing spark
• Battery not charging where charging circuit is fitted
• Hard starting
• Engine cuts out when warm
• Misfire at higher RPM
• Burnt windings or damaged stator wires
• Cracked insulation or corroded connector
• AC output below specification during testing

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 855721T8 later Mercury stator assembly reference
• 855721A4 earlier / related Mercury stator assembly reference

OEM / Related Numbers

• 855721T8
• 855721T 8
• 855721A4
• 855721A 4
• 398-855721T8 related service format

Aftermarket / Verified Equivalents

• CDI Electronics: 174-5721
• Aftermarket reference: 855721T8
• Aftermarket reference: 855721A4

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated