Sierra Ignition Wire Term.Mc20121 And 18-5224
Need several, or a formal quote? Send us a message.
- Ships from U.S. warehouses. Shipping cost is shown at checkout.
- 30-day returns on new, unused items in original packaging. Return policy
- Not sure it fits? Call (832) 308-3163, Mon–Thu 9–5, Fri 9–2 Central.
- Secure checkout with all major credit cards.
Description
This Sierra premium marine spark plug wire set fits Mercruiser 350 Mag Ski and 5.0L Alpha and Bravo Generation II 8 cylinder engines with Thunderbolt ignition.
Features
- Magnetic Suppression Core manufactured for your specific application.
- Kevlar® core for maximum durability and long life
- Durable stainless steel wound conductor for maximum horsepower and engine performance
- Premium silicone jacketing and boots for the ultimate in high temperature protection
- Superior RFI suppression for the most sensitive electronic system
- Corrosion resistant stainless steel spark plug and distributor terminals for maximum conductivity
- OE style boots provide a sealed barrier against heat, dirt and moisture
- Thunderbolt type ignition
Specifications
- Application: Mercruiser - 350 Mag Ski, 5.0L Alpha & Bravo Generation II, 8 cylinder, Thunderbolt ignition
- OEM numbers: 84-816761Q4, 84-816761Q3, 84-816761Q17
- Manufacturer part number: 18-8821-1
Specifications
- Brand
- Sierra
- Manufacturer part #
- 18-8821-1
- JMS SKU
- JMS149792
- UPC
- 808282194499
- Shipping weight
- 1.99 lb
Shipping
Most orders ship within 1–2 days from U.S. warehouses. You'll see the shipping cost and choose a method at checkout.
Returns
Return new, unused items in original packaging within 30 days. Defective items after 30 days follow the manufacturer's warranty. Return policy
Questions
Call (832) 308-3163 or send us a message. Have your boat's make, model and year handy.



