Ciweisah Outboard Ignition Coils for Johnson & Evinrude — Black 2-Pack, Direct-Fit 4–300HP

Ciweisah two-pack ignition coils replace part numbers 582508 / 183-2508 / 18-5179 and supply the high-voltage spark your Johnson or Evinrude outboard needs to start reliably.

Designed as a direct-fit replacement for many Johnson and Evinrude/OMC outboard engines, this pair of black ignition coils is built to restore spark performance across a wide horsepower range—from small 4HP up to heavy 300HP units. Each coil amplifies low battery voltage to the levels required for efficient ignition. The package contains two identical coils, with straightforward installation for mechanics and do-it-yourselfers familiar with outboard ignition systems. Always verify your engine model and part number before installing.

Will these coils work with my Johnson or Evinrude outboard?

These Ciweisah coils are made to replace OEM part numbers 582508, 183-2508, and 18-5179 and fit many Johnson and Evinrude (BRP/OMC) models across several horsepower categories. Compatibility spans smaller engines like 4–15HP up through large powerplants up to 300HP, though fitment should be confirmed by matching part numbers and engine model.

• Replaces part numbers: 582508, 183-2508, 18-5179.
• Intended for Johnson and Evinrude/OMC outboards.
• Covers a wide HP range: 4HP to 300HP (check model-specific fit).
• Package includes two ignition coils (2-pack).

How do these coils improve starting and ignition?

The ignition coil converts and multiplies the battery’s low voltage into the high-voltage pulse needed to create a spark at the plug. Replacing a weakened or damaged coil restores consistent spark energy, which can reduce misfires and hard starts without altering engine tuning.

• Amplifies battery voltage into a strong spark for ignition.
• Helps reduce misfires and uneven running caused by weak coils.
• Designed to meet original OEM electrical output characteristics.
• Sold as a matched pair to replace worn coils together.

What should I know about installation and maintenance?

Installation is straightforward for anyone familiar with outboard ignition work: remove the old coil, transfer any brackets or wires as needed, then secure the new coil in the original mounting location. Use caution around electrical connections and follow the engine maker’s service manual for torque and wiring diagrams.

• Simple swap: remove old coil, install the Ciweisah coil in the original spot.
• Transfer mounting hardware and ensure secure wiring connections.
• Inspect spark plug wires and boots while servicing the coil.
• Always confirm correct coil orientation and clearance per manual.

How durable and reliable are these replacement coils?

Constructed for marine conditions, these coils use materials and winding specifications intended to handle normal outboard operating environments. While not an OEM-branded coil, the units are built to provide stable spark output and withstand the vibration and temperature ranges typical of boating applications.

• Marine-suitable construction for vibration resistance.
• Encapsulated windings to protect against moisture and contaminants.
• Pair packaging lets you replace both coils to maintain balanced ignition.
• Check engine-specific service intervals for preventative replacement.

Who is this product for? Boaters, mechanics, and marine DIYers who need a cost-effective, direct-fit ignition coil replacement for Johnson and Evinrude outboards will find value in this Ciweisah 2-pack. It’s aimed at anyone restoring spark performance on small to large horsepower engines (double-check part numbers and engine models before purchase). Ideal when you want a straightforward replacement that matches common OEM part references 582508 / 183-2508 / 18-5179 and comes ready for installation.