Sierra 18-5854-1 Stator, Replaces Mercury 398-5454A17, for 115 HP 6 Cylinder Outboard Motors

The Sierra 18-5854-1 Stator is a copper alloy ignition/charging component built to replace the factory stator on qualifying Mercury/Mariner outboard motors. The stator generates the AC current that feeds the engine's ignition and charging systems, and a worn or failed stator is a common cause of no-spark, weak charging, or intermittent electrical faults on older outboards. This unit is designed as a direct fit for Mercury/Mariner 115 HP 6 cylinder outboards with engine numbers 5314656 and up, and it cross-references to several widely used OEM and aftermarket part numbers, making it easy to identify as the correct replacement regardless of which number appears on your old unit or your parts diagram.

Construction uses a copper alloy winding for consistent electrical output and long service life in the marine environment. The stator ships with an extra black lead that must be connected to engine ground for correct operation; this is a factory-specified wiring detail rather than an optional connection. As a properly fitted replacement, it is designed to meet or exceed the output and durability of the original equipment part it replaces, restoring normal ignition and charging performance without modification to the powerhead.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5854-1
• Weight: 3.3 pounds
• Color: White
• Material: Copper alloy
• Engine Type: Gasoline
• Fuel Type: Gasoline
• Mounting Type: Engine mount
• Maximum Horsepower: 115 HP
• Wiring Note: Extra black lead connects to engine ground
• UPC: 808282392482

Fitment

• Mercury/Mariner 115 HP, 6 cylinder outboard, engine numbers 5314656 and up

Replaces (OEM)

• Mercury 398-5454A17
• Mercury 398-5454A8
• CDI 174-5456
• Mallory 9-25500

Frequently Asked Questions

What engines does the Sierra 18-5854-1 stator fit? It fits Mercury/Mariner 115 HP, 6 cylinder outboard motors with engine numbers 5314656 and up. Check your engine's serial number against this range before ordering.

Is this stator an OEM part or an aftermarket replacement? The 18-5854-1 is a Sierra aftermarket replacement stator, built to meet or exceed the output and durability of the original equipment part it replaces.

What OEM part numbers does the 18-5854-1 stator replace? It replaces Mercury 398-5454A17 and 398-5454A8, as well as CDI 174-5456 and Mallory 9-25500, so any of those numbers on your old stator confirm this is the correct replacement.

What is the extra black lead wire for on this stator? The 18-5854-1 stator includes an extra black lead that must be connected to engine ground; this is a required wiring connection, not an optional one.

What material is the Sierra 18-5854-1 stator made from? It is made from copper alloy windings, chosen for consistent electrical output and durability in marine service.

How much does the 18-5854-1 stator weigh? The stator weighs 3.3 pounds.

What color is the Sierra 18-5854-1 stator? It has a white finish.

What symptoms indicate my outboard's stator needs replacing? A failing stator on a 115 HP 6 cylinder Mercury/Mariner outboard commonly causes no-spark conditions, weak or inconsistent charging, or intermittent electrical faults, all of which the 18-5854-1 is designed to correct when installed as a direct replacement.

Does the 18-5854-1 stator include a warranty? Yes, the Sierra 18-5854-1 stator is backed by Sierra's standard product warranty.

Will the 18-5854-1 stator fit any Mercury outboard regardless of horsepower? No, this stator is fit-specific to Mercury/Mariner 115 HP, 6 cylinder outboards with engine numbers 5314656 and up; confirm your engine's serial number falls in this range before purchasing.

Is the 18-5854-1 a direct bolt-in replacement? Yes, when matched to the correct engine number range, the 18-5854-1 installs in place of the original stator without modification.

What is included when I order the 18-5854-1 stator? The order includes one Sierra 18-5854-1 stator unit with its wiring leads, including the extra black ground lead.