Spark Plug HT Lead (7") for Mercury 30–200HP Outboards | Replaces 84-821945A28, F718503, 813706A28

This 7" high-tension spark plug lead is a quality aftermarket replacement for a wide range of Mercury outboards from 30HP to 200HP. Designed to provide reliable spark delivery under all marine operating conditions.

Fits Mercury Outboards:
• 30HP
• 115HP
• 125HP
• 135HP
• 150HP
• 175HP
• 200HP

(Fits engines using OEM part numbers listed — please verify with your model or serial number before purchase.)

Replaces Mercury Part Numbers:
• 84-821945A28
• F718503
• 813706A28
• 821945A28
• 821945T28

Product Features:
• Length: 7 inches
• High-quality aftermarket build
• Reliable spark transmission under load
• Marine-grade materials for heat and moisture resistance
• Direct-fit, quick installation

⚠️ If you're unsure about compatibility, contact SSI Marine with your engine details — we’ll be happy to confirm the correct lead length and part for your outboard.

Why Buy from SSI Marine?
• Fast dispatch from UK stock
• Same-day shipping before 1PM
• Collection available from our Leigh, Manchester unit
• VAT invoices available on request
• Trusted by marine techs, anglers, and DIY boaters

Ignite performance with dependable parts from SSI Marine.

Spark Plug 7" Wire, HT LEAD for Mercury 30 to 115-125-135-150-175-200 HP, 84-821945A28