Sierra 18-8821-1 Wiring Plug Set Replaces 84-816761Q3

Sierra 18-8821-1 Mercruiser Thunderbolt V8 Gen+ Spark Plug Wire Set

Sierra replacement engine parts are designed to meet or exceed OEM requirements. This spark wire set is used on Mercruiser engines.

• Kit includes coil wire.
• 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.

Interchangeable with:

• Mercruiser Stern Drive
• 84-813720A3
• 84-813720A4
• 84-816761A17
• 84-816761A4
• 84-816761Q17
• 84-816761Q3
• 84-816761Q4

Application:

• 200 2BBL. GM    1987-1995
• 230 4 BBL. GM   1987-1995
• 260 4 BBL. GM   1987-1995
• 260 GM             1987-1995
• 350 MAG ALPHA 4 BBL GM  1996-1997
• 350 MAG ALPHA GM   1987-1995
• 350 MAG SKI GM 1995
• 350 MAG SKI GM 1992-1996
• 350 MAG SKI GM 350 V-8  1997
• 357 ALPHA 4V   2008-2009
• 357 MAG BRAVO 4V  2008-2009
• 383 MAG BRAVO 4V  2008-2009
• 5.0L 2 BBL GM 1987-1998
• 5.0LX 4 BBL GM  1987-1995
• 5.7L 2 BBL GM   1996-1998
• 5.7 COMPETITION SKI GM 1997
• 5.7L GM  1987-1995
• 5.7L MIE GM  1994

California Residents: WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov