Gasket – Fits Mercury/Mercruiser 30-45 HP Outboards (Replaces 27-19552)

$2.75

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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.).

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Delivery and Shipping

Free standard shipping on all orders under 1 KG

If you have any questions, feel free to email us at info@sierramarines.com, and we’ll get back to you within 20–36 hours.

Product Details

This replacement Gasket – Fits Mercury/Mercruiser 30-45 HP Outboards (Replaces 27-19552) is engineered for a precise fit on various 4-stroke Mercury outboards from the 1990s and early 2000s, covering models from 30 to 45 HP. It ensures a reliable seal for optimal engine performance and longevity.

This part is a direct replacement for Mercury OEM part number 27-19552 and Quicksilver 27-19552.

Designed for engine-specific installation.
Constructed from durable paper/composite material.
This is a genuine OEM Mercury Marine factory part.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number
Mercury	27-19552
Quicksilver	27-19552

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Compatibility information is for Mercury outboard engines. Please check your serial number range to ensure correct fitment.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.
Mercury	45 (4 CYL.)	45	4-Stroke	0A719281 & Up	27-19552
Mercury	45 (4 CYL.)	45	4-Stroke	0B110789 & Up	27-19552
Mercury	45 (4 CYL.)	45	4-Stroke	9466692 & Up	27-19552
Mercury	40 JET 30 JET	40/30	4-Stroke	0C159200 THRU 0G589999	27-19552
Mercury	30 JET	30	4-Stroke	9570790 AND UP	27-19552
Mercury	35	35	4-Stroke	9466647 & Up	27-19552
Mercury	35	35	4-Stroke	B110789 & Up	27-19552
Mercury	40 (4 CYL.)	40	4-Stroke	0C159200 AND UP	27-19552
Mercury	40 (4 CYL.)	40	4-Stroke	9570790 AND UP	27-19552

Technical Specs

Product Type: Gasket
Installation: Engine-specific installation
Housing Material: Paper/Composite
Dimensions: Length: 1.06 in, Width: 7.5 in, Height: 6.0 in
Weight: 0.02 lb (0.009 kg)
Warranty: 30 days (from South Central Outboards)
Other Technical Attributes: OEM Mercury Marine factory part, GTIN: 745061127982

What’s in the Box

1 x Gasket (27-19552)

Installation Notes

Ensure the engine is off and cool before starting. Disconnect the battery for safety.
Locate and remove the component that requires the new gasket.
Carefully remove the old gasket material from both mating surfaces. Use a plastic scraper to avoid gouging the metal.
Clean the surfaces thoroughly with a suitable degreaser or solvent to ensure they are free of oil, debris, and old sealant.
Position the new gasket correctly. Do not use any sealant unless specified by the engine manufacturer.
Reinstall the component and tighten the fasteners in the sequence and to the torque values specified in your service manual.
Reconnect the battery, start the engine, and carefully check for any leaks around the newly installed gasket.

Troubleshooting & FAQ

How do I know if this gasket fits my engine?

This gasket is for specific Mercury 30–45-HP, 4-stroke outboards from the 1990s and early 2000s. Always verify your engine's serial number against the compatibility table. If unsure, consult your service manual or contact a professional.

What are the signs of a failing gasket?

Common symptoms of a bad gasket include fluid leaks (oil or coolant), engine overheating, a noticeable loss of power or compression, or visible cracks and brittleness in the old gasket material upon inspection.

Can I reuse my old gasket?

No. Gaskets are single-use components designed to compress and create a seal. Reusing a gasket will likely result in leaks and improper engine performance. Always replace gaskets whenever a component is removed.

What is the difference between OEM and aftermarket parts?

This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Our parts are manufactured in an ISO 9001 certified facility and are batch-inspected for quality and consistency.

What are your shipping speeds and costs?

We ship worldwide quickly—typical transit time is 5–15 days. Standard shipping is free for most orders; expedited options are available at checkout where applicable.

What is the warranty and return policy?

This part is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our full policy page or reach out for instructions.

Safety & Important Info

Verify images and specifications against your original part before purchase. If anything differs—even if your model appears compatible—do not purchase.
This is an aftermarket replacement part, not an OEM component. References to brand names and part numbers are for reference purposes only.
Professional installation is highly recommended for safety and to ensure proper performance. Adhere to all service manual guidelines.

About Sea Sierra

Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
Fast Global Fulfillment — We offer free standard delivery to most regions, with an average transit time of 5–15 days.
Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.

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