Distributor Cap Gasket – Fits Mercury Marine & MerCruiser V8 Engines (Replaces 391-5076)
Distributor Cap Gasket – Fits Mercury Marine & MerCruiser V8 Engines (Replaces 391-5076) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Distributor Cap Gasket – Fits Mercury Marine & MerCruiser V8 En...
Product Details
This Distributor Cap Gasket is a crucial seal for various MerCruiser V8 engines equipped with Mallory ignition systems, covering models from the 1980s through 2001. It prevents moisture and debris from entering the distributor, ensuring reliable ignition performance.
It serves as a direct cross-reference for Mercury/Quicksilver part number 391-5076 and Mallory 5076.
- Installs between the distributor cap and its base to create a secure seal.
- Engineered as a precise OEM replacement for MerCruiser engines using Mallory ignition systems.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Mercury/Quicksilver | 391-5076 |
| Mallory | 5076 |
Engine & Model Compatibility
Confirm your engine model and year in the table below.
This part is specifically for MerCruiser V8 engines that use a Mallory ignition system. Please verify your system before ordering.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | 5.7L EFI MIE 350/V8 | 350 | 4-Stroke | 1997 | 391-5076 | Serial Range: 0K040300–0K999999 |
| MerCruiser | 5.7L MIE (Gen +) 350/V8 | 350 | 4-Stroke | 1998–2001 | 391-5076 | Serial Range: 0L002003 & Up |
| MerCruiser | 5.7L MIE 350/V8 | 350 | 4-Stroke | 1994–1997 | 391-5076 | Serial Range: 0F025000–0K999999 |
| MerCruiser | 5.7L Ski 350/V8 | 350 | 4-Stroke | 1985–1995 | 391-5076 | Serial Range: 0A338533–0F775199 |
| MerCruiser | 5.7L Ski 350/V8 | 350 | 4-Stroke | 1996–2001 | 391-5076 | Serial Range: 0F775200 & Up |
| MerCruiser | 5.7LX 350/V8 | 350 | 4-Stroke | 1996–1997 | 391-5076 | Serial Range: 0F601000–0K999999 |
Technical Specs
- Product Type
- Distributor Cap Gasket
- Installation
- Placed between distributor cap and base
- Dimensions
- 7.13 × 6.0 × 1.13 in (181.1 × 152.4 × 28.7 mm)
- Weight
- 0.2 lbs (0.09 kg)
- Warranty
- 30 Day
- Other Technical Attributes
- OEM replacement part for MerCruiser Mallory ignition systems
What’s in the Box
- 1 x Distributor Cap Gasket (391-5076)
Installation Notes
- Ensure the engine is off and the battery is disconnected for safety.
- Locate the distributor cap on your engine. Note the orientation of the spark plug wires.
- Release the clips or unscrew the fasteners holding the cap to the distributor base.
- Carefully lift the cap off and set it aside without disconnecting the plug wires.
- Remove the old, worn distributor cap gasket from the distributor housing.
- Thoroughly clean the mating surfaces on both the cap and the housing to remove any old gasket material or corrosion.
- Place the new gasket into position on the distributor housing, ensuring it sits flat and is correctly aligned.
- Reinstall the distributor cap, making sure it is properly seated on the new gasket.
- Secure the cap with the original clips or screws. Do not overtighten.
- Reconnect the battery.
Troubleshooting & FAQ
How do I confirm this gasket fits my specific MerCruiser V8?
First, verify your engine has a Mallory ignition system. This gasket is not for other ignition types. Second, check your engine model and serial number against the compatibility table provided. If it's listed, it's a confirmed fit.
What are the signs of a failing distributor cap gasket?
Symptoms include difficulty starting, engine misfires (especially in damp weather), a cracked or brittle appearance of the old gasket, and evidence of moisture or carbon tracking inside the distributor cap.
How often should this gasket be replaced?
It is best practice to replace the distributor cap gasket whenever you replace the distributor cap and rotor. This is typically part of a routine tune-up every few seasons, depending on engine hours and operating conditions.
Can a bad gasket cause engine damage?
While the gasket itself is unlikely to cause direct mechanical damage, its failure can allow moisture into the distributor. This can lead to ignition system failure, poor engine performance, increased fuel consumption, and potentially leave you stranded.
Is any sealant required for installation?
No, this gasket is designed to be installed dry. Do not use any RTV, silicone, or other sealants, as they can interfere with proper seating and are not necessary for a good seal.
What is the difference between this and an original Mallory or Mercury part?
This is an aftermarket part designed to meet or exceed OEM specifications for fit, form, and function. It offers the same performance and sealing capability as the original part at a more competitive value.
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.
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