Sierra 18-99171 Outboard Stator Coil, 2 Cylinder, Replaces OMC 581670 584504 584840, Fits Johnson/Evinrude 4-60 HP 1977-2007

The Sierra 18-99171 is a 2 cylinder stator coil built as a replacement for Johnson/Evinrude outboard engines. The stator is a core charging system component that generates the AC current used to power the engine's ignition and charging circuits; a worn or failed stator commonly causes hard starting, weak spark, or a dead battery even though the alternator wiring checks out. This unit is designed to install in place of the original stator assembly using the factory mounting points and wiring connections, with no modification required.

Sierra part number 18-99171 covers Johnson/Evinrude 4 to 60 HP outboard engines built from 1977 to 2007, and cross-references directly to several OMC/Johnson/Evinrude OEM part numbers, making it straightforward to identify against the number stamped on your old stator or listed in your engine's parts manual.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99171
• Number of Cylinders: 2
• Compatible Horsepower Range: 4 to 60 HP
• Compatible Model Years: 1977-2007
• Compatible Engine Brand: Johnson/Evinrude
• Weight: 0.2 pounds
• Package Dimensions: 5.87 x 4.88 x 2.01 inches
• UPC: 808282393724
• OEM Cross Reference: 5000611, 581670, 584504, 584840, 585073, 0581670

Fitment

• Johnson/Evinrude outboard engines, 4 to 60 HP, model years 1977-2007

Replaces (OEM)

• 5000611
• 581670
• 584504
• 584840
• 585073
• 0581670

Frequently Asked Questions

What engines does the Sierra 18-99171 stator coil fit? The Sierra 18-99171 fits Johnson/Evinrude outboard engines from 4 to 60 HP, covering model years 1977 to 2007.

Is the 18-99171 a 2 cylinder or 4 cylinder stator? It is a 2 cylinder stator coil, matching the charging system layout on the covered Johnson/Evinrude 4 to 60 HP engines.

What OEM part numbers does the 18-99171 replace? Sierra 18-99171 replaces OEM/OMC numbers 5000611, 581670, 584504, 584840, 585073, and 0581670, so it can be cross-checked against any of these on your old stator or in your parts manual.

How much does the 18-99171 stator coil weigh? The Sierra 18-99171 stator coil weighs 0.2 pounds.

What are the package dimensions of the 18-99171? It ships in packaging measuring 5.87 x 4.88 x 2.01 inches.

Will this stator work on a 1977 Johnson or Evinrude outboard? Yes, the Sierra 18-99171 is compatible with Johnson/Evinrude engines from model years 1977 through 2007, which includes 1977 model year outboards in the 4 to 60 HP range.

How do I know if my stator has failed and needs a replacement like the 18-99171? A failing stator typically causes weak or intermittent spark, hard starting, or a battery that will not stay charged; testing the stator's output against the engine manual's specification will confirm if replacement with a unit like the 18-99171 is needed.

Does the 18-99171 stator install using the factory mounting points? Yes, the Sierra 18-99171 is designed to mount using the same factory mounting points and wiring connections as the original Johnson/Evinrude stator it replaces.

Is Sierra 18-99171 a genuine OEM part or aftermarket? The 18-99171 is a Sierra-branded replacement part manufactured to cross-reference and replace the original OMC/Johnson/Evinrude stator, rather than being sold under the original OEM label.

What is included when I order the 18-99171? The order includes one Sierra 18-99171 2 cylinder stator coil unit.

Can I use the UPC to verify I am ordering the correct stator? Yes, UPC 808282393724 corresponds to the Sierra 18-99171 stator coil and can be used to confirm the correct item when ordering.