Sierra 18-99249 4-Cylinder CD Power Pack for Johnson Evinrude OMC Sea Drive, Replaces 18-5783, Fits 90/110/115 HP

The Sierra 18-99249 is a 4-cylinder CD power pack built to replace the ignition power pack on Johnson, Evinrude, and OMC Sea Drive outboard engines. This electronic ignition component controls spark timing and delivery to the engine's cylinders, and it is a direct functional replacement for the original equipment power pack used on 90, 110, and 115 HP engines. The unit has no RPM limit, so it will not artificially cap engine speed the way some aftermarket ignition components do.

Each package contains one power pack. Because the covered engines use two power packs working together, two units (two separate packages) are required for a complete ignition system replacement -- if only one power pack has failed, the second can typically remain in service, but many installers replace both at the same time to ensure matched performance and to avoid a second failure shortly after the repair.

The Sierra 18-99249 is intended as a drop-in replacement for the OEM power pack, using the original mounting and wiring configuration on the engines it fits, and is backed by a 2-year manufacturer warranty.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99249
• Category: Evinrude Outboard Power Packs
• Cylinders: 4-Cylinder
• RPM Limit: None
• Package Contents: One power pack (two required per engine)
• Warranty: 2-year manufacturer warranty
• Weight: 0.56 pounds
• Package Dimensions: 5 x 4 x 2 inches
• UPC: 808282396596

Fitment

• Johnson, Evinrude, and OMC Sea Drive outboards, 90 HP, 110 HP, and 115 HP, 1985-1986 (two power packs required per engine)

Replaces (OEM)

• 18-5783
• 4-5783
• 582811
• 763794
• 9-25005

Frequently Asked Questions

What engines does the Sierra 18-99249 power pack fit? The Sierra 18-99249 fits Johnson, Evinrude, and OMC Sea Drive outboards rated at 90 HP, 110 HP, and 115 HP, 1985-1986.

Is there an RPM limit on this power pack? No, the Sierra 18-99249 has no RPM limit, unlike some aftermarket power packs that cap engine speed.

Do I need to buy more than one power pack? Yes. The 90, 110, and 115 HP Johnson/Evinrude/OMC Sea Drive engines covered by the 18-99249 use two power packs, and each Sierra 18-99249 package contains only one unit, so two packages are needed for a full ignition replacement.

What OEM part numbers does the 18-99249 replace? The Sierra 18-99249 replaces OEM numbers 18-5783, 4-5783, 582811, 763794, and 9-25005.

Is the 18-99249 a genuine OEM part or an aftermarket replacement? The 18-99249 is a Sierra-branded replacement power pack designed to functionally replace the original OEM units listed under its cross-reference numbers, not an OEM-branded part.

How much does the Sierra 18-99249 power pack weigh? The Sierra 18-99249 weighs 0.56 pounds.

What are the package dimensions of the 18-99249? The 18-99249 ships in a package measuring 5 x 4 x 2 inches.

Does the Sierra 18-99249 come with a warranty? Yes, the Sierra 18-99249 is backed by a 2-year manufacturer warranty.

Can I replace just one power pack if only one has failed? The 90/110/115 HP engines that use the 18-99249 run two power packs, so a single 18-99249 can replace just the failed unit, though many installers choose to replace both for matched performance.

What is included in the box with the 18-99249? Each Sierra 18-99249 package includes one power pack; it does not include the second power pack required for a complete twin-pack ignition system.

Is the 18-99249 compatible with other outboard brands besides Johnson and Evinrude? The 18-99249 is designated for Johnson, Evinrude, and OMC Sea Drive 90, 110, and 115 HP outboards; compatibility outside these engines is not specified.