Sierra Power Pack 18-5785-1, Replaces Evinrude/Johnson 585261, for 40 HP and 50 HP Electric Start Outboards

The Sierra 18-5785-1 Power Pack is an ignition power pack built to meet or exceed the quality of the original equipment part it replaces. It serves as the ignition control module for select Evinrude/Johnson outboard motors, managing spark timing so the engine starts reliably and runs smoothly. This power pack is a direct fit for 40 HP Electric Start and 50 HP Electric Start outboard models (1993-01), giving boat owners a straightforward way to restore ignition performance without sourcing a used or discontinued original part.

Constructed with copper and PVC materials for durable electrical performance, the 18-5785-1 is manufactured to Sierra's quality standards and is cross-referenced to common OEM and aftermarket ignition part numbers, making it easy to identify as the correct replacement for your engine.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5785-1
• Product Type: Power Pack (Ignition Module)
• Category: Evinrude Outboard Power Packs
• Weight: 0.79 pounds
• Material: Copper, Polyvinyl Chloride (PVC)
• UPC: 808282392529
• Fitment - Horsepower: 40 HP Electric Start, 50 HP Electric Start
• Fitment - Model Years: 1993-01

Fitment

• 40 HP Electric Start outboards, model years 1993-01
• 50 HP Electric Start outboards, model years 1993-01

Replaces (OEM)

• CDI 113-5316
• Evinrude/Johnson 585261
• Mallory 9-25013

Frequently Asked Questions

What outboard motors does the Sierra 18-5785-1 Power Pack fit? The Sierra 18-5785-1 fits 40 HP Electric Start and 50 HP Electric Start outboard motors from model years 1993-01.

Does this power pack fit the rope start version of the 40 HP or 50 HP outboard? No. The rope start 40 HP and 50 HP outboards use a different Sierra power pack part number; the 18-5785-1 is specific to the Electric Start versions of these motors.

What OEM part numbers does the Sierra 18-5785-1 replace? The 18-5785-1 is a direct replacement for CDI 113-5316, Evinrude/Johnson 585261, and Mallory 9-25013.

Is the Sierra 18-5785-1 a genuine Evinrude/Johnson part or an aftermarket replacement? It is a Sierra-manufactured aftermarket power pack engineered to meet or exceed the performance of the original Evinrude/Johnson 585261 equipment part.

What is the Sierra 18-5785-1 Power Pack made of? It is constructed with copper and PVC materials for reliable electrical performance in the marine ignition system.

How much does the Sierra 18-5785-1 Power Pack weigh? The Sierra 18-5785-1 Power Pack weighs 0.79 pounds.

Can I install the Sierra 18-5785-1 myself? The 18-5785-1 power pack is a direct bolt-in replacement for the original ignition power pack on compatible 40 HP and 50 HP Electric Start outboards, allowing straightforward swap-in installation for anyone comfortable working on outboard ignition systems.

What is included when I order the Sierra 18-5785-1? Each order includes one Sierra 18-5785-1 Power Pack.

Will the Sierra 18-5785-1 work on a 50 HP three-cylinder outboard? No. The 50 HP (3 cyl) 1996-99 outboard uses a different Sierra power pack, part number 18-5780; the 18-5785-1 is designated for the 40 HP and 50 HP Electric Start models listed in its fitment.

How does the Sierra 18-5785-1 compare to the original Evinrude/Johnson 585261 power pack? The 18-5785-1 is built to meet or exceed the original equipment quality of the Evinrude/Johnson 585261, providing equivalent ignition performance as a replacement part.

Is the Sierra 18-5785-1 compatible with CDI or Mallory ignition systems? Yes, the 18-5785-1 is cross-referenced as a replacement for CDI 113-5316 and Mallory 9-25013, so it can be used in place of those parts on compatible outboards.