Quicksilver 816761Q17 Spark Plug Wire Kit for MerCruiser V8 LH | Thunderbolt IV (1993–2003)
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Description
xReliable ignition for MerCruiser V8 engines
The Quicksilver 816761Q17 Spark Plug Wire Kit is crafted as a marine-grade replacement for MerCruiser V8 LH powerplants using Thunderbolt IV ignition systems from 1993 through 2003. This kit offers a complete, factory-style wiring solution designed to support steady starts and smooth idle in demanding sea conditions.
What you get
- Complete set of spark plug wires with boots at the spark plug end
- Tailored to reach the correct plug location without stressing the harness
- Designed for efficiency, endurance and durability in a marine engine environment
Key compatibility and design details
The kit targets MerCruiser V8 LH configurations (305 and 350 CID) with Thunderbolt IV ignition, spanning model years 1993–2003. It aligns with original equipment expectations, offering a practical replacement option when wiring and boots reach the end of their service life.
Why choose Quicksilver
- 65 years of marine industry experience and testing in harsh environments
- Leader in Mercury Marine Original Equipment replacement parts and accessories
- Quality you can feel in fit, finish, and durable construction designed to withstand waves, vibration, and salt spray
Real-world use and expectations
Whether you're cruising at sunset or navigating a choppy afternoon, this kit aims to support reliable ignition and steady running. It offers a practical option when regular maintenance calls for renewed wiring and boots. Benefits are described as possibilities, not guarantees, and will vary with upkeep and operating conditions.
Consider this kit as part of a routine maintenance plan for engines from the Thunderbolt IV era, especially if you value a factory-style wiring solution that aligns with original equipment expectations and marine-duty durability.
FAQ
Q: What is the Quicksilver 816761Q17 Spark Plug Wire Kit designed for?
A: For MerCruiser V8 LH engines with Thunderbolt IV ignition (1993–2003).
Q: What benefits does this kit offer?
A: Complete wires with boots and a tailored fit designed for durability in marine use.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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