Spark Plug Wire Set for Volvo Penta and MerCruiser V8 5.0L/5.7L Engines
Spark Plug Wire Set for Volvo Penta and MerCruiser V8 5.0L/5.7L Engines is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
Spark Plug Wire Set for Volvo Penta and MerCruiser V8 5.0L/5.7L Eng...
Spark Plug Wire Set for Volvo Penta and MerCruiser V8 5.0L/5.7L Engines is backordered and will ship as soon as it is back in stock.
Product Details
This spark plug wire set is designed for selected Volvo Penta and MerCruiser V8 gasoline engines using distributor-style electronic ignition. The set is intended for Volvo Penta 5.0L and 5.7L GXi, Gi, GL, OSi and OSXi engine families, together with selected MerCruiser 5.0L and 5.7L MPI applications.
Use the engine model, model year and existing part number to verify compatibility before ordering. This is an aftermarket replacement set and is not an OEM-branded component.
- Complete replacement wire set for V8 distributor-to-spark-plug connections.
- Designed for direct-fit replacement where the listed engine and ignition configuration matches.
- Silicone outer jackets and high-performance conductors are intended to withstand typical marine-engine operating conditions.
- Includes nine wires: eight spark-plug wires and one coil wire.
Part Number Cross-Reference
The following numbers are aftermarket and manufacturer references associated with this application. Confirm the number on your original set and the complete engine configuration before purchase.
| Brand | Reference Number |
|---|---|
| Volvo Penta | 3888328 |
| Volvo Penta | 3859000 |
| MerCruiser | 816608Q61 |
| MerCruiser | 816608A61 |
| MerCruiser | 816761A15 |
| Sierra | 18-8804 |
Engine and Model Compatibility
Compatibility depends on the exact engine model, ignition arrangement and year. The grouped applications below are provided as a guide; they do not replace verification against the engine identification label or the original wire set.
| Brand | Engine and Model Families | Displacement | Stroke | Application Range | Related References |
|---|---|---|---|---|---|
| Volvo Penta | 5.0GL, 5.0Gi, 5.0GXi and 5.0OSi families, including applicable B through N suffix variants | 5.0L V8 | 4-stroke | Selected 2001–2012 applications | 3888328, 3859000 |
| Volvo Penta | 5.7GL, 5.7Gi, 5.7GXi, 5.7OSi and 5.7OSXi families, including applicable Gi-300, GXiE, GiC and GXiC variants | 5.7L V8 | 4-stroke | Selected 2001–2012 applications | 3888328, 3859000 |
| MerCruiser | 5.0L MPI and 5.7L MPI engine applications using the corresponding distributor-style ignition and wire layout | 5.0L or 5.7L V8 | 4-stroke | Selected 2002 and newer applications | 816608Q61, 816608A61, 816761A15 |
Important: Do not rely on displacement alone. Confirm the exact model suffix, year, ignition system, distributor configuration, connector ends and wire routing. The grouped compatibility information above does not confirm every model-year or serial-number combination.
Technical Specifications
- Product Type
- Spark plug wire set
- Application
- Selected Volvo Penta and MerCruiser V8 gasoline engines
- Installation
- Direct-fit replacement where the listed application is confirmed
- Connection
- Distributor cap to spark plugs, with a coil lead included
- Number of Wires
- 9 total wires for an applicable V8 ignition system
- Conductor
- High-performance stainless-steel conductor
- Outer Jacket
- Silicone
- Wire Diameter
- Approximately 8 mm
- Wire Lengths
- Mixed lengths for the applicable engine routing; approximately 35–89 cm (13.8–35 in)
- Fuel Type
- Gasoline
- Ignition Type
- Electronic ignition applications using a distributor-style wire set
- Color
- Jacket and boot colors may vary by manufacturing batch or supplier
- Weight
- Approximately 0.77 kg (1.7 lb)
What's in the Box
- 1 x complete spark plug wire set
- 8 x spark plug wires
- 1 x coil wire
- Typical length assortment: 2 x approximately 89 cm, 2 x approximately 76 cm, 2 x approximately 67 cm, 2 x approximately 53.5 cm and 1 x approximately 35 cm, subject to production variation
Installation Notes
- Disconnect the battery and allow the engine to cool before beginning work.
- Replace one wire at a time so the cylinder firing order and original routing are not confused.
- Grasp each boot rather than pulling on the wire itself. Twist gently if necessary to release the old boot.
- Compare each replacement wire with the original before installation and route it away from hot or moving components.
- Apply a small amount of dielectric grease inside the boots if appropriate for the ignition-system manufacturer’s instructions.
- Push each boot fully onto the spark plug, distributor cap and coil connection until it is securely seated.
- Reconnect the battery and run the engine. Check for a smooth idle, proper acceleration and secure wire clearance.
Troubleshooting and FAQ
How do I confirm that this wire set fits my engine?
Check the complete engine model and year, ignition arrangement and the number on your existing wire set. Compare the connector ends, wire routing and lengths with the product information above. If any detail differs, obtain confirmation before ordering.
What are common symptoms of worn spark plug wires?
Possible symptoms include rough idle, misfire under load, reduced power, hard starting, poor fuel economy and visible cracking, burning or corrosion. These symptoms can have other causes, so inspect the complete ignition system before replacing parts.
Why might the wire color differ from the original?
Jacket or boot color can vary by manufacturer or production batch. Match the application, connector ends, dimensions and routing rather than color alone.
How often should spark plug wires be replaced?
There is no universal replacement interval. Inspect the wires during routine maintenance and replace them when they show damage, excessive resistance, arcing or performance-related deterioration.
Is this an OEM part?
No. This listing is for an aftermarket replacement set. The manufacturer and supplier may use different jacket or boot colors and packaging than the original equipment part.
What warranty applies?
Warranty coverage, if applicable, is subject to the seller's current warranty terms. Contact support with the order details and product photographs if a manufacturing issue is found.
Safety and Important Information
- Verify the exact engine model, year, ignition configuration and original wire arrangement before ordering.
- Do not install a wire that is too short, too long, damaged or routed near an exhaust component.
- Disconnect the battery before service and keep ignition components away from fuel vapors.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended when the firing order, distributor routing or engine identification is uncertain.
About Sea Sierra
- Marine Replacement Parts — Parts selected for common marine-engine service and replacement applications.
- Application-Focused Information — Verify model, year and configuration before installation.
- Support — Contact customer service with your engine details and original-part photographs when fitment assistance is needed.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
