Distributor Gasket – Fits Mercury MerCruiser (Replaces 27-87707)
Distributor Gasket – Fits Mercury MerCruiser (Replaces 27-87707) 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 Gasket – Fits Mercury MerCruiser (Replaces 27-87707)
Product Details
This high-quality aftermarket Distributor Gasket provides a reliable seal between the distributor and engine block on various Mercury MerCruiser inboard and sterndrive engines. It is engineered to prevent oil leaks and ensure proper distributor alignment and function.
This part is a direct replacement for Mercury part number 27-87707 and Sierra interchange 18-2945.
- Installs between the distributor base and the engine block to create a secure seal.
- Made from a durable paper/fiber composite material to match OEM performance.
- Essential for preventing oil contamination of distributor components.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 27-87707 |
| Sierra | 18-2945 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury | MerCruiser Inboard/Sterndrive | Various | 4-Stroke | 27-87707 |
Technical Specs
- Product Type
- Distributor Gasket
- Installation
- Between distributor and engine block
- Fuel Type
- Gasoline
- Housing Material
- Paper/Fiber Composite
- Housing Color
- Brown/Tan
- Dimensions
- 5.13 × 4.0 × 0.13 inches
- Weight
- 0.01 lb (4.5 g)
- Other Technical Attributes
- OEM replacement sealing gasket
What’s in the Box
- 1 x Distributor Gasket (27-87707)
Installation Notes
- Disconnect the vessel's battery before beginning work.
- Locate the distributor and carefully disconnect any attached wiring harnesses.
- Mark the precise position of the distributor housing and rotor relative to the engine block for accurate reinstallation.
- Remove the distributor hold-down clamp and bolt, then carefully lift the distributor assembly out of the engine.
- Remove the old, worn gasket and thoroughly clean any residue from both the engine block and distributor mating surfaces.
- Position the new gasket onto the engine block.
- Reinstall the distributor, ensuring it aligns perfectly with the marks made earlier.
- Secure the hold-down clamp and reconnect all wiring.
- Reconnect the battery, start the engine, and verify ignition timing according to the manufacturer's service manual.
Troubleshooting & FAQ
What are the signs of a failing distributor gasket?
Common symptoms include oil leaking from the base of the distributor, which can lead to a dirty engine bay and low oil levels. If oil gets inside the distributor, it can also cause rough idling, engine misfires, or hesitation.
How can I confirm this gasket fits my specific engine model?
This gasket is designed for a range of Mercury MerCruiser engines. The most reliable method is to verify that your old part carries the OEM number 27-87707. You can also consult the cross-reference table and your engine's service manual.
Is sealant required when installing this gasket?
Typically, this type of paper/fiber gasket is designed to be installed dry. Applying sealants can sometimes cause the gasket to slip or squeeze out of place. However, always defer to the instructions in your specific engine's official service manual.
What is the recommended replacement interval for a distributor gasket?
There is no fixed replacement interval. The gasket should be replaced any time the distributor is removed for service, or if you notice signs of leakage or degradation.
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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