DECAL SET-ALPHA – Fits Mercury/MerCruiser Alpha One Gen II (Replaces 861431A98)

$23.50

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DECAL SET-ALPHA – Fits Mercury/MerCruiser Alpha One Gen II (Replaces 861431A98) is backordered and will ship as soon as it is back in stock.

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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.).

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

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 is an aftermarket DECAL SET-ALPHA – Fits Mercury/MerCruiser Alpha One Gen II (Replaces 861431A98), designed as a direct replacement for genuine Mercury Marine factory OEM decal sets. It is specifically intended for MerCruiser Alpha One Generation II stern drives manufactured from 1998 onwards, starting with serial number 0L100040.

This set directly replaces and provides a cosmetic refresh equivalent to Mercury Marine part numbers 37-861431A98 and 861431A98.

Features a simple peel-and-stick application for easy installation.
Made from durable vinyl to withstand the marine environment.
Includes all necessary Alpha One (Gen II) branding decals to restore your stern drive's original look.

Part Number Matrix

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

Brand	Part Number
Mercury Marine	37-861431A98
Mercury Marine	861431A98

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
MerCruiser	Alpha One (Gen II)	All	N/A	1998 and up (0L100040 & Up)	37-861431A98	Stern drive trim decals

Technical Specs

Product Type: Decal Set
Installation: Peel and stick
Housing Material: Vinyl
Dimensions: Length: 558.8 mm (22.00 in), Width: 88.9 mm (3.50 in), Height: 6.35 mm (0.25 in)
Weight: 0.059 kg (0.13 lb)
Other Technical Attributes: Alpha One (Gen II) branding decals

What’s in the Box

1 x DECAL SET-ALPHA (37-861431A98/861431A98)

Installation Notes

Thoroughly clean the stern drive surface with a degreaser or isopropyl alcohol to remove all wax, oil, and debris. Ensure the surface is completely dry.
Carefully position the main decals on the drive housing, using masking tape as a temporary hinge to ensure alignment before peeling the backing.
Peel the backing paper away slowly, pressing the decal onto the surface from the center outwards with a squeegee or credit card to eliminate air bubbles.
Apply firm, even pressure across the entire decal to ensure a strong bond.
Allow the decals to cure for at least 24 hours before exposing the boat to water.

Troubleshooting & FAQ

Will this decal set fit my older Alpha One drive?

This set is specifically designed for Alpha One Generation II drives from 1998 and newer (serial number 0L100040 and up). It will not fit Gen I or earlier models.

How do these aftermarket decals compare to the OEM version?

Our decals are engineered to meet or exceed OEM specifications for fit, color, and durability. They are made from high-quality, marine-grade vinyl for long-lasting performance.

What is the best way to ensure the decals adhere properly?

Surface preparation is key. The area must be perfectly clean, dry, and free of any oils or waxes. Applying them in a warm, dry environment (above 50°F / 10°C) also improves adhesion.

How long can I expect these decals to last?

With proper application on a clean surface, these marine-grade vinyl decals should last for several years, resisting fading and peeling from sun, salt, and water exposure.

My old decals are cracked and peeling. Is it difficult to remove them?

Gently heating the old decals with a hair dryer or heat gun will soften the adhesive, making them easier to peel off. Any remaining residue can be removed with an adhesive remover solvent.

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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