Sierra Power Pack 18-99169 for Johnson/Evinrude 4 Cylinder 85-140 HP Outboards, 1973-1977

The Sierra 18-99169 is an ignition power pack built for Johnson/Evinrude 4 cylinder outboard engines. It serves as the electronic ignition control component in the engine's ignition system, replacing the original factory power pack when it fails or wears out. This power pack is compatible with 85, 115, 135 and 140 HP Johnson/Evinrude 4 cylinder outboards from 1973-1977, making it a straightforward swap-in solution for boat owners servicing these engines. It cross-references directly to the OEM power pack numbers used on these engines, so it can be ordered using either the Sierra part number or any of the original Johnson/Evinrude part numbers it replaces. At 0.9 pounds, it is a compact component that mounts within the outboard's ignition circuit. Boat owners and marine technicians use this part when troubleshooting ignition failure, intermittent spark, or a no-start condition traced to a failed power pack on a 4 cylinder Johnson/Evinrude outboard. Always confirm the specific engine model and HP rating against the part number before ordering to ensure proper fit.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99169
• Product Type: Ignition Power Pack
• Compatible Engines: Johnson/Evinrude 4 cylinder outboards
• Compatible Horsepower: 85, 115, 135, 140 HP
• Compatible Years: 1973-1977
• Weight: 0.9 pounds
• OEM Cross Reference: 581311, 581731, 581709, 582056, 581895

Fitment

• Johnson/Evinrude 4 cylinder outboards, 85, 115, 135 and 140 HP, 1973-1977

Replaces (OEM)

• 581311
• 581731
• 581709
• 582056
• 581895

Frequently Asked Questions

What does the Sierra 18-99169 power pack do? It functions as the ignition power pack for Johnson/Evinrude 4 cylinder outboard engines, controlling the electronic ignition system so the engine fires correctly.

Which engines fit part number 18-99169? Johnson/Evinrude 4 cylinder outboards rated 85, 115, 135 and 140 HP from 1973-1977 use the 18-99169 power pack.

Is the 18-99169 a direct replacement for my factory power pack? Yes, the Sierra 18-99169 cross-references to OEM power pack numbers 581311, 581731, 581709, 582056 and 581895, so it is a direct replacement on the Johnson/Evinrude engines that used those factory parts.

What horsepower ratings does this power pack cover? The 18-99169 covers 85, 115, 135 and 140 HP Johnson/Evinrude 4 cylinder outboard engines.

What model years is the 18-99169 designed for? This power pack is designed for the 1973-1977 model years of the compatible Johnson/Evinrude 4 cylinder engines.

How much does the 18-99169 power pack weigh? It weighs 0.9 pounds.

What OEM part numbers does this cross-reference? Part 18-99169 cross-references OEM numbers 581311, 581731, 581709, 582056 and 581895.

Can I install the 18-99169 power pack myself? The 18-99169 is designed as a direct swap for the original Johnson/Evinrude power pack on compatible engines, so it can be installed by anyone comfortable working on the outboard's ignition wiring; consult your engine's service manual for the exact procedure.

Will 18-99169 fit a 6 cylinder Evinrude engine? No, the 18-99169 power pack is built for 4 cylinder Johnson/Evinrude outboards only, specifically the 85, 115, 135 and 140 HP models from 1973-1977.

Does ordering 18-99169 include the full power pack unit? Yes, ordering Sierra part 18-99169 gets you the complete ignition power pack unit ready to install in place of the original.

Is 18-99169 genuine Sierra or an aftermarket brand? The 18-99169 is a Sierra branded ignition power pack.

How do I confirm 18-99169 is correct for my outboard? Match your engine's horsepower rating (85, 115, 135 or 140 HP), cylinder count (4 cylinder), and model year (1973-1977) against the 18-99169 specifications, or check for one of its cross-reference numbers (581311, 581731, 581709, 582056, 581895) on your original power pack.