Gasket – Fits Mercury Marine/Mercruiser Outboards (Replaces 27-19551)
Gasket – Fits Mercury Marine/Mercruiser Outboards (Replaces 27-19551) 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).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This replacement Gasket – Fits Mercury Marine/Mercruiser Outboards (Replaces 27-19551) is designed for a range of 30–60 HP 3-cylinder and 35–45 HP 4-cylinder outboard engines. Fitment is dependent on the engine's serial number, covering various model years.
It serves as a direct replacement for Mercury Marine/Mercruiser part number 27-19551 and GLM part number 19551.
- Engine-specific installation for a precise fit.
- Manufactured to OEM factory part specifications.
- Ensures a reliable seal for optimal engine performance.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury Marine/Mercruiser | 27-19551 |
| GLM | 19551 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury Marine/Mercruiser engines, verify that your engine's serial number falls within the specified ranges to ensure compatibility.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury | 45 (4 CYL.) | 45 | 4-Stroke | 0A719281 & Up | 27-19551 | Serial number dependent |
| Mercury | 45 (4 CYL.) | 45 | 4-Stroke | 0B110789 & Up | 27-19551 | Serial number dependent |
| Mercury | 45 (4 CYL.) | 45 | 4-Stroke | 9466692 & Up | 27-19551 | Serial number dependent |
| Mercury | 35 | 35 | 4-Stroke | 9466647 & Up | 27-19551 | Serial number dependent |
| Mercury | 35 | 35 | 4-Stroke | B110789 & Up | 27-19551 | Serial number dependent |
| Mercury | 50 (3 CYL.) | 50 | 2-Stroke | 0A721308 & Up | 27-19551 | Serial number dependent |
| Mercury | 50 (3 CYL.) | 50 | 2-Stroke | 0B122930 THRU 0D000749 | 27-19551 | Serial number dependent |
| Mercury | 50 (3 CYL.) | 50 | 2-Stroke | 9469200 THRU 9683054 | 27-19551 | Serial number dependent |
| Mercury | 60 (3 CYL.) | 60 | 2-Stroke | 0A721308 & Up | 27-19551 | Serial number dependent |
| Mercury | 60 (3 CYL.) | 60 | 2-Stroke | 0B122930 THRU 0D000749 | 27-19551 | Serial number dependent |
| Mercury | 60 (3 CYL.) | 60 | 2-Stroke | 9469200 THRU 9683054 | 27-19551 | Serial number dependent |
| Mercury | 40 JET 30 JET | 40/30 | 0C159200 THRU 0G589999 | 27-19551 | Serial number dependent | |
| Mercury | 30 JET | 30 | 9570790 AND UP | 27-19551 | Serial number dependent | |
| Mercury | 40 (4 CYL.) | 40 | 4-Stroke | 0C159200 AND UP | 27-19551 | Serial number dependent |
| Mercury | 40 (4 CYL.) | 40 | 4-Stroke | 9570790 AND UP | 27-19551 | Serial number dependent |
Technical Specs
- Product Type
- Gasket
- Installation
- Engine-specific
- Dimensions
- 6.0" x 7.5" x 0.13"
- Weight
- 0.045 kg (1.6 oz)
- Other Technical Attributes
- OEM Factory Part
What’s in the Box
- 1 x GASKET (27-19551)
Installation Notes
- Ensure the engine is off and cool, and disconnect the battery.
- Access the component requiring the new gasket, removing any obstructing parts.
- Carefully remove the old gasket. Thoroughly clean away any old adhesive or gasket material from both mating surfaces.
- Position the new gasket correctly onto the clean surface.
- Reassemble all components, tightening bolts in the sequence and to the torque values specified in your service manual.
- After reassembly, reconnect the battery and check for any leaks.
Troubleshooting & FAQ
How do I know if this gasket fits my specific engine?
The most reliable method is to match your engine's serial number to the ranges listed in the Engine & Model Compatibility table. Always cross-reference your part number and serial number before ordering.
What are common signs of a failed gasket?
Signs of a faulty gasket include engine overheating, poor performance, visible fluid leaks (oil or coolant), or milky, emulsified engine oil, which suggests coolant is mixing with the oil.
Does this gasket require sealant upon installation?
Whether a sealant is needed depends on the specific application. Some gaskets are designed for dry installation. Always consult your engine's service manual for the correct installation procedure and sealant requirements.
The compatibility table lists "3-Stroke" for some models. Is this correct?
This is a common typographical error in parts databases. The engines listed as "3-Stroke" are actually 2-stroke models. We have corrected this information in our listing for clarity and accuracy.
Why are there multiple serial number ranges for the same engine model?
Manufacturers often make small design modifications during a production run. Different serial number ranges indicate these specific versions, which can affect part compatibility. Matching your serial number is crucial for a correct fit.
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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