Sierra 18-99166 Power Pack for Johnson/Evinrude 4-Cylinder 1995-2006, Replaces 765386 586015 586098 586292

The Sierra 18-99166 Power Pack is a direct-fit ignition control module for 1995-2006 Johnson and Evinrude 4-cylinder outboards, covering the 80 Jet, 90, 100, 105 Commercial, and 115 HP engine lineup. The power pack manages spark timing and delivery for the engine's ignition system, and is a common replacement when an outboard develops hard starting, misfiring, stalling, or a no-spark condition tied to a failed ignition module. It installs in place of the factory unit using the existing wiring harness connections, so no rewiring is required on a correct-fit application.

This power pack weighs 1.3 pounds and measures 7 x 9 x 2.5 inches, matching the footprint and mounting pattern of the original Johnson/Evinrude unit it replaces. It is finished in blue. Confirm your outboard's HP, cylinder count, and model year against the fitment and OEM cross-reference numbers below before ordering, since Johnson/Evinrude used different power packs across engine families.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99166
• Weight: 1.3 pounds
• Product Dimensions: 7 x 9 x 2.5 inches
• Color: Blue
• Cylinder Configuration: 4 Cylinder
• UPC: 808282393670

Fitment

• Johnson/Evinrude 4-cylinder outboards, 1995-2006: 80 Jet, 90, 100, 105 Commercial, and 115 HP

Replaces (OEM)

• 765386
• 586015
• 586098
• 586292

Frequently Asked Questions

What engines does the Sierra 18-99166 power pack fit? The Sierra 18-99166 fits Johnson and Evinrude 4-cylinder outboards from 1995-2006, specifically the 80 Jet, 90, 100, 105 Commercial, and 115 HP models.

Is the 18-99166 an OEM or aftermarket power pack? The 18-99166 is an aftermarket replacement power pack built to replace the original Johnson/Evinrude ignition module on covered engines.

Which OEM part numbers does the 18-99166 replace? It replaces Johnson/Evinrude OEM numbers 765386, 586015, 586098, and 586292.

How much does the 18-99166 power pack weigh? The power pack weighs 1.3 pounds.

What are the dimensions of the 18-99166? It measures 7 x 9 x 2.5 inches.

What symptoms indicate a failed power pack on a Johnson/Evinrude 4-cylinder outboard? Hard starting, misfiring, stalling, or a complete no-spark condition are common signs of a failing power pack on covered 1995-2006 4-cylinder Johnson/Evinrude engines, and are the typical reason to install the 18-99166.

Does the 18-99166 require any rewiring to install? No, the 18-99166 connects using the existing wiring harness connections on a correctly matched Johnson/Evinrude 4-cylinder outboard, so no rewiring is needed.

What color is the 18-99166 power pack? The 18-99166 power pack is blue.

Will the 18-99166 fit a 6-cylinder Johnson/Evinrude outboard? No, the 18-99166 is built specifically for 4-cylinder Johnson/Evinrude outboards in the 80 Jet, 90, 100, 105 Commercial, and 115 HP range.

What is the manufacturer part number for this power pack? The manufacturer part number is 18-99166.