Sierra Ignition Coil 18-5176 for Evinrude 150/155/175/185 HP Outboards

The Sierra 18-5176 is an ignition coil built for Evinrude outboard engines, supplying the coil qty of 6 configuration used across a specific range of Evinrude horsepower ratings and model years. The ignition coil is a core part of the outboard's ignition system, stepping up battery voltage to the level needed to fire the spark plugs and keep the engine running smoothly through the RPM range. Replacing a weak or failed coil with the correct Sierra part restores reliable spark delivery, which shows up as easier starting, smoother idle, and steadier performance under load.

Sierra part 18-5176 is application-specific: it fits Evinrude 150 HP outboards from model years 1979 to 1984 and again in 1988, 155 HP outboards in 1984 and 1988, 175 HP outboards from 1979 to 1983, and 185 HP outboards in 1984. Each of these applications uses a 6-coil setup. Other Evinrude model years in the same horsepower classes use different Sierra coil numbers, so confirming the exact model year against the fitment list below ensures the correct coil is ordered the first time.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5176
• Product Type: Ignition Coil
• Coil Quantity: 6
• Weight: 0.41 pounds
• UPC: 030999236784
• Fitment: Evinrude 150 HP (1979-1984, 1988), 155 HP (1984, 1988), 175 HP (1979-1983), 185 HP (1984)

Fitment

• Evinrude 150 HP: 1979-1984 and 1988
• Evinrude 155 HP: 1984 and 1988
• Evinrude 175 HP: 1979-1983
• Evinrude 185 HP: 1984

Frequently Asked Questions

What does the Sierra 18-5176 ignition coil fit? The Sierra 18-5176 fits Evinrude outboards: 150 HP for model years 1979-1984 and 1988, 155 HP for 1984 and 1988, 175 HP for 1979-1983, and 185 HP for 1984.

How many coils come with part number 18-5176? Sierra 18-5176 is used in a 6-coil configuration on all of its listed Evinrude applications.

How much does the 18-5176 ignition coil weigh? The Sierra 18-5176 ignition coil weighs 0.41 pounds.

Is the 18-5176 the same coil used on later Evinrude model years? No. Evinrude 150 HP and 175 HP outboards built from 1991 to 2006 use Sierra coil 18-5170 in a 3-coil configuration, and other years in between use Sierra 18-5179, so 18-5176 is specific to the model years listed for this part.

What is the UPC for the Sierra 18-5176 ignition coil? The UPC for the Sierra 18-5176 ignition coil is 030999236784.

My 1988 Evinrude 150 HP needs a coil, which part number is correct? For a 1988 Evinrude 150 HP outboard, Sierra 18-5176 is the correct ignition coil in the 6-coil configuration.

Does the 18-5176 fit both 155 HP and 185 HP Evinrude engines? Yes, Sierra 18-5176 covers Evinrude 155 HP in 1984 and 1988, and Evinrude 185 HP in 1984, in addition to its 150 HP and 175 HP applications.

Is this a genuine Sierra part or aftermarket? This is a genuine Sierra ignition coil, part number 18-5176, manufactured by Sierra for the listed Evinrude outboard applications.

What is included when ordering the 18-5176? Ordering Sierra 18-5176 includes the ignition coil itself, sized for the 6-coil setup used on its listed Evinrude 150, 155, 175, and 185 HP applications.

Why are there different Sierra coil numbers for the same horsepower rating? Evinrude changed ignition coil designs across model years, so the same horsepower rating can require different Sierra part numbers depending on the year; 18-5176 covers the specific years listed for 150, 155, 175, and 185 HP models.