Sierra 18-99239 Johnson Evinrude 2 Cylinder Stator, 6 Amp, Replaces 775530, 580809, 581232

The Sierra 18-99239 is a 2-cylinder stator built for Johnson and Evinrude outboards, delivering a 6 amp charging output for the ignition and charging system. It mounts with screws and uses a screw-type connector across 2 contacts and 2 poles, matching the original electrical layout of the engines it is designed to replace on. This stator is a direct fit for Johnson/Evinrude 50 HP outboards produced in 1971-1975 and 55 HP outboards produced in 1976-1977, restoring reliable spark and charging performance on these older powerheads.

Stators are a common wear item on vintage outboards, and a failing unit typically shows up as hard starting, weak or intermittent spark, or a charging system that no longer keeps the battery topped up. The Sierra 18-99239 is manufactured to correctly replace the factory unit on these applications, using the same screw-mount installation and 2-pole, 2-contact wiring so it drops into the existing harness without modification.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99239
• Product Type: Stator
• Number of Cylinders: 2
• Current Rating: 6 Amps
• Number of Poles: 2
• Number of Contacts: 2
• Connector Type: Screw
• Mounting Type: Screw Mount
• Weight: 2.2 pounds

Fitment

• Johnson/Evinrude 50 HP outboards, 1971-1975
• Johnson/Evinrude 55 HP outboards, 1976-1977

Replaces (OEM)

• 775530
• 580809
• 581232

Frequently Asked Questions

What engines does the Sierra 18-99239 stator fit? The Sierra 18-99239 fits Johnson/Evinrude 50 HP outboards from 1971-1975 and Johnson/Evinrude 55 HP outboards from 1976-1977.

Is the Sierra 18-99239 a direct replacement for OEM stators? Yes, the 18-99239 is built to replace OEM Johnson/Evinrude stators listed under numbers 775530, 580809, and 581232 on the applicable 50 HP and 55 HP engines.

How many amps does this stator put out? The Sierra 18-99239 is rated for 6 amps of output on 2-cylinder Johnson/Evinrude powerheads.

How many cylinders is the 18-99239 stator designed for? This stator is built for 2-cylinder Johnson/Evinrude outboard engines.

What OEM part numbers does the 18-99239 cross-reference? It cross-references OEM numbers 775530, 580809, and 581232.

How does the stator mount to the engine? The Sierra 18-99239 uses a screw mount and connects through a screw-type connector with 2 contacts and 2 poles.

What does the box include when ordering part 18-99239? You receive one Sierra 18-99239 stator, ready to install with its screw-mount hardware interface and screw-type electrical connector.

How much does the 18-99239 stator weigh? The Sierra 18-99239 weighs 2.2 pounds.

What are the symptoms of a failing stator on these outboards? Hard starting, weak or intermittent spark, and a charging system that fails to keep the battery charged are common signs that a stator like the 18-99239 needs replacement.

Does the 18-99239 fit both 50 HP and 55 HP Johnson/Evinrude models? Yes, this single part number covers the 50 HP outboards built 1971-1975 and the 55 HP outboards built 1976-1977.