Gasket – Fits Mercury Marine / Mercruiser 135–200 HP (Replaces 27-672751)
Gasket – Fits Mercury Marine / Mercruiser 135–200 HP (Replaces 27-672751) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Gasket – Fits Mercury Marine / Mercruiser 135–200 HP (Replaces 27-6...
Product Details
This induction silencer cover Gasket fits Mercury Marine / Mercruiser 135–200 HP (Replaces 27-672751) V-6 2-stroke outboard engines across various models manufactured between 1976 and 1988. It ensures a proper seal for the induction system, preventing air leaks and maintaining engine performance.
This part is a direct replacement for Quicksilver and Mercury OEM part number 27-672751.
- Installs on the induction silencer cover.
- This is a new, factory-original equipment item; New Old Stock (NOS) may be available.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Mercury Marine / Quicksilver | 27-672751 | Retail/Catalog part number |
| Mercury Marine | 672751 | Internal manufacturer part number |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This gasket is designed for a range of V-6 2-Stroke outboards under the Mercury Marine and MerCruiser brands. Please check your engine's serial number plate or service manual to verify the model and year before ordering.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury Marine / MerCruiser | V-135 | 135 | V-6 2-Stroke | 1978–1985 | 27-672751 | |
| Mercury Marine / MerCruiser | V-150 | 150 | V-6 2-Stroke | 1978–1985 | 27-672751 | Includes V-150 Marathon, V-150 Magnum, V-150 Work |
| Mercury Marine / MerCruiser | V-1500 | 150 | V-6 2-Stroke | 1978–1985 | 27-672751 | |
| Mercury Marine / MerCruiser | V-150-XR-2 | 150 | V-6 2-Stroke | 1978–1985 | 27-672751 | |
| Mercury Marine / MerCruiser | MAGNUM II | 150 | V-6 2-Stroke | 1978–1985 | 27-672751 | |
| Mercury Marine / MerCruiser | V-175 | 175 | V-6 2-Stroke | 1976–1988 | 27-672751 | |
| Mercury Marine / MerCruiser | V-200 | 200 | V-6 2-Stroke | 1978–1988 | 27-672751 | |
| Mercury Marine / MerCruiser | XR-4 | 200 | V-6 2-Stroke | 1978–1988 | 27-672751 | |
| Mercury Marine / MerCruiser | MERC XR2 | UNK | 2-Stroke | UNK | 27-672751 | Race Outboard |
Technical Specs
- Product Type
- Gasket
- Installation Location
- Induction Silencer Cover
- Product Dimensions
- 13.0 x 10.0 x 1.06 in (330 x 254 x 27 mm)
- Weight
- 0.4 lbs (0.18 kg)
- Other Attributes
- Factory original equipment item; New Old Stock (NOS) may be available
What’s in the Box
- 1 x GASKET (27-672751)
Installation Notes
- Ensure the engine is off and cool, and disconnect the battery for safety.
- Locate the induction silencer cover on the engine.
- Carefully remove the fasteners securing the cover and lift it off.
- Remove the old gasket. Thoroughly clean both the engine and cover mating surfaces to remove any old gasket material or residue.
- Place the new gasket into position, ensuring it is aligned correctly.
- Reinstall the induction silencer cover and tighten the fasteners to the manufacturer's recommended torque specifications.
- Reconnect the battery, start the engine, and listen for any unusual air noises that would indicate a leak.
Troubleshooting & FAQ
How do I know if this gasket will fit my engine?
This gasket fits a specific range of Mercury Marine/MerCruiser V-6 2-Stroke outboards from 135 to 200 HP, generally manufactured between 1976 and 1988. The most reliable way to confirm fitment is to check your engine's service manual or existing part for the number 27-672751. You should also compare your model against the detailed compatibility table provided on this page.
What are the symptoms of a bad induction silencer gasket?
A failing gasket can cause an air leak, leading to symptoms like a high-pitched whistling or hissing sound from the engine, a rough or unstable idle, difficulty starting, and reduced overall engine performance or fuel efficiency.
Is any sealant required for installation?
Typically, this type of gasket is designed for a dry-fit installation and does not require any additional sealant. However, always refer to your specific engine's service manual for the official recommendation from the manufacturer, as requirements can vary.
What is the difference between part number 27-672751 and 672751?
They refer to the same component. 27-672751 is the complete part number used in retail catalogs and packaging, while 672751 is often the base number stamped on the part or used in internal service literature. If your part has either number, this is the correct replacement.
What does "New Old Stock" (NOS) mean?
New Old Stock (NOS) refers to genuine OEM parts that were never sold or installed and have been kept in storage. They are authentic original parts, but may have older packaging or none at all. NOS items provide OEM quality at a potentially lower cost.
How often should this gasket be replaced?
There is no fixed replacement interval for this gasket. It should be replaced whenever the induction silencer cover is removed for service, or if it shows signs of damage, brittleness, or leakage.
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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