Sierra Premium Marine Spark Plug Wire – 6" | 47-88161 | MerCruiser Thunderbolt
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Sierra Premium Marine Spark Plug Wire – 6" Replacement Lead | MerCruiser Thunderbolt
Replace a single damaged or worn spark plug wire without swapping out the entire set. This Sierra 6" premium marine plug wire is built for MerCruiser Thunderbolt ignition systems and delivers the same marine-grade construction as the full wire sets — Kevlar® core, silicone jacketing, and corrosion-resistant terminals — in a single-lead format for targeted repairs or custom routing applications.
Compatible Applications
- MerCruiser engines equipped with Thunderbolt ignition systems
- Suitable for use as a replacement lead or extension in custom ignition wire routing
- Refer to Sierra part number 47-88161 for specific fitment details
Key Features
- Kevlar® core — maximum durability and long service life under continuous vibration
- Stainless steel wound conductor — optimized for maximum horsepower and consistent engine performance
- Premium silicone jacketing and boot — high-temperature protection against engine bay heat
- Superior RFI suppression — shields sensitive onboard electronics from ignition interference
- Corrosion-resistant stainless steel terminals — maximum conductivity at spark plug and distributor connections
- OE-style sealed boot — barrier against heat, dirt, and moisture intrusion
- Application-specific magnetic suppression core — precision fit for Thunderbolt ignition
Specifications
- Part Number: 47-88161
- Wire Length: 6 inches
- Ignition Type: Thunderbolt (MerCruiser)
- Sold As: Single wire
- Condition: New
Need a Full Wire Set?
If multiple wires are worn or damaged, replacing the full set is the better value. Browse our complete range of MerCruiser Thunderbolt wire sets in the Ignition Components collection, including the Sierra Wire Set – 47-88021, 47-88032, 47-88041, 47-88071, 47-88082, 47-88101, and 47-88111.
Parts Desk Insights
This single 6" wire is best suited for situations where one lead has been physically damaged — chafed insulation, a melted boot, or a broken terminal — and the rest of the set is in good condition. It’s also useful for custom ignition builds or routing modifications on Thunderbolt-equipped MerCruiser engines where a non-standard lead length is needed. That said, if the engine is misfiring or showing ignition issues and the wires are original or high-hour, replacing the full set is the more reliable fix — individual wire resistance can vary and a single replacement may not resolve the underlying issue.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.