PRODUCT DETAILS
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.
SHIPPING & DELIVERY
Delivery & Returns Policy
Delivery
Standard Delivery
- £6: Royal Mail Tracked 24 Service
- £3.99: Large Letter - Royal Mail 1st Class Post (Untracked)
We offer free delivery on all orders over £150 (excludes outboard engines).
Orders placed before 1:00 PM (Monday-Friday) are usually dispatched the same working day.
Most parcels are delivered within 24 hours, but please allow extra time for courier delays that may occur outside our control.
For outboard engines, please contact us for a delivery quote.
Important: Please ensure your shipping address is correct before completing checkout. SSI Marine is not responsible for parcels sent to an incorrect address provided by the buyer.
Tracking Your Order
Once your order has been dispatched, you will receive a tracking number via email (after 5 PM on the day of dispatch).
Tracking is available only for parcels sent via Royal Mail Tracked 24.
Large Letter orders are sent via Royal Mail 1st Class Post (untracked).
Returns
We accept returns of unused and undamaged items within 30 days of purchase.
Returned items must be in sellable condition and include the original packaging.
Please do not tape, label, or write directly on the product's original box.
Important: Do not return items in their original product boxes only, they must be placed inside a protective outer box or bag. Parcels returned like the example below will be subject to a 20% restocking fee.
Return shipping costs are the customer's responsibility.
Please include your order details and reason for return inside the parcel.
Refunds
Refunds are issued for the item purchase price only (shipping costs are non-refundable).
All refunds will be made using the same payment method as your original order.
Items returned in poor condition or without proper packaging may incur a 20% restocking fee.
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