Tune-Up Kit – Fits MerCruiser V8 Holley Engine Ignition (Replaces 801767, Sierra 18-5254)
Tune-Up Kit – Fits MerCruiser V8 Holley Engine Ignition (Replaces 801767, Sierra 18-5254) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 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).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Tune-Up Kit – Fits MerCruiser V8 Holley Engine Ignition (Replaces 8...
Product Details
This Tune-Up Kit – Fits MerCruiser V8 Holley Engine Ignition is engineered for various MerCruiser V8 Holley engine models that are equipped with Mercury ignition systems. It provides essential components to restore ignition performance and efficiency.
This kit is a direct interchange for Mercury MerCruiser part number 801767 and Sierra part number 18-5254.
- Designed as a direct replacement for original OEM components, ensuring straightforward installation.
- Compatible with standard gasoline marine engines.
- Features a direct-fit connection for the Holley engine distributor.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury MerCruiser | 801767 |
| Sierra | 18-5254 |
| UPC | 030999318671 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|
| MerCruiser | V8 with Holley Engine | 4-Stroke | 801767 | Original OEM part now limited availability |
Technical Specs
- Product Type
- Ignition Tune-Up Kit
- Installation
- Direct replacement for OEM components
- Fuel Type
- Gasoline
- Connection
- Direct fit to Holley engine distributor
- Dimensions
- 6.0" H x 7.13" W x 1.63" L
- Other Technical Attributes
- Compatible with V8 engines with Mercury ignition systems
What’s in the Box
- 1 x Tune-Up Kit (801767/18-5254)
Installation Notes
- Disconnect the boat's battery before beginning work to prevent electrical shorts.
- Carefully label each spark plug wire's position before disconnecting them from the distributor cap.
- Remove the two retaining screws or clips holding the old distributor cap and lift it off.
- Remove the old ignition rotor by pulling it straight up off the distributor shaft.
- Clean the distributor base and install the new rotor, ensuring it is fully seated in the correct orientation.
- Place the new distributor cap on the distributor, aligning any notches or tabs for a proper fit, and secure it.
- Reconnect the spark plug wires to their corresponding terminals on the new cap.
- Reconnect the battery, start the engine, and check for smooth operation.
Troubleshooting & FAQ
How do I know if this tune-up kit fits my engine?
This kit is designed for MerCruiser V8 engines using a Holley carburetor and a Mercury ignition system. Always verify the part numbers (801767, 18-5254) against your engine's service manual to ensure an exact match.
What are the signs that my ignition tune-up kit needs replacement?
Common symptoms of a failing ignition kit include engine misfires, rough idling, difficulty starting, reduced power, and poor fuel economy. A visual inspection of the distributor cap and rotor for cracks, carbon tracking, corrosion, or physical wear is also recommended.
What is the recommended replacement interval for this kit?
For optimal performance and reliability, it's good practice to inspect ignition components annually. We recommend replacing them as part of your regular maintenance schedule, typically every 100-200 operating hours, depending on usage and marine conditions.
Are spark plugs included with this kit?
The contents are listed under the "What’s in the Box" section. This kit contains the primary ignition components like the distributor cap and rotor. Spark plugs are generally sold separately to allow for specific engine application choices.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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