Power Trim Tilt Relay – Fits Mercury/Mariner Outboards 20-300HP (Replaces 882751A1, 882751A2)

$12.49 $19.00

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Power Trim Tilt Relay – Fits Mercury/Mariner Outboards 20-300HP (Replaces 882751A1, 882751A2) 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.).

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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 heavy-duty Power Trim Tilt Relay is a direct replacement for Mercury/Mariner outboards from 20–300HP (1994–2023), Force outboards from 75–120HP (1994–1999), and select Johnson/Evinrude sterndrives. It provides reliable 12VDC/40A power switching for your engine's trim and tilt system, ensuring smooth and consistent operation.

This relay interchanges with OEM parts including Mercury 882751A1, 882751A2, 8M0207773, Volvo Penta 3854138, and aftermarket references like Sierra 18-5849.

Features a simple 5-pin terminal for quick-connect installation.
Built with a marine-grade sealed housing to resist corrosion in harsh saltwater environments.
Engineered as a single-pole, double-throw (SPDT) relay for proper trim circuit function.

Part Number Matrix

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

Brand	Part Number
Mercury	882751A1
Mercury	882751A2
Mercury	8M0207773
American Zettler	AZ973-1C-12DC4
Omron	G8JN-1C6T-F-R-DC12
Volvo Penta	3854138
Tyco	VF4-35F11-Z07
Bosch	4RD 960 388-32
Bosch	4RD 960 388-31
Potter & Brumfield	87414
Song Chuan	896E-1CH-D1SW U55
Hella	VF4-55F11
Sierra	18-5849

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Fits a wide range of Mercury, Mariner, and Force outboards, as well as select sterndrives from OMC and Volvo Penta.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
Mercury	20/25/30/40/50/60	20–60	4-Stroke	1994–2023	882751A1/882751A2
Mercury	75/90/100/115/125	75–125	4-Stroke	1994–2023	882751A1/882751A2
Mercury	135/150/175/200/225/250/300	135–300	4-Stroke	1994–2023	882751A1/882751A2	Non-Verado models
Mercury	75/90/100/115/125	75–125	2-Stroke	1994–2018	882751A1/882751A2
Mercury	135/150/175/200/225/250	135–250	2-Stroke	1994–2018	882751A1/882751A2
Mariner	20/25/30/40/50/60	20–60	4-Stroke	1994–2023	882751A1/882751A2
Mariner	75/90/100/115/125	75–125	4-Stroke	1994–2023	882751A1/882751A2
Mariner	135/150/175/200/225/250/300	135–300	4-Stroke	1994–2023	882751A1/882751A2	Non-Verado models
Force	75/90/120	75–120	2-Stroke	1994–1999	882751A1/882751A2
Johnson/Evinrude	OMC Sterndrive	5.0–5.8L	4-Stroke	1996–2006	3854138	V6/V8 sterndrives
Volvo Penta	Select Models	Various	4-Stroke	1996–2016	3854138	Compatible with trim systems

Technical Specs

Product Type: Power Trim Tilt Relay
Installation: DIN Rail Mount/Quick Connect
Connection: 5-Pin Terminal
Housing: Black plastic with sealed contacts
Dimensions: Approx. 30 x 30 x 30 mm (1.18 x 1.18 x 1.18 in)
Weight: 0.1 kg (3.52 oz)
Voltage: 12 VDC
Current Rating: 40 Amps
Contact Type: SPDT (Single Pole Double Throw)
Contact Material: Silver Alloy
Construction: Corrosion-resistant, marine-grade sealed design
Warranty: 1-Year Manufacturer Warranty

What’s in the Box

1 x Power Trim Tilt Relay (Replaces 882751A1/882751A2/8M0207773)

Installation Notes

Disconnect the boat's battery at the negative terminal to prevent electrical shorts.
Locate the old power trim relay. It is typically found near the engine's electrical box or starter solenoid.
Carefully unplug the wiring harness connector from the old relay. Note the orientation of the pins.
Remove the old relay from its mounting point, which may be a simple slide-off mount or held by a screw.
Mount the new relay firmly in the same location and orientation as the original.
Plug the wiring harness securely into the new 5-pin relay until it clicks into place.
Reconnect the boat's battery, starting with the positive terminal.
Test the trim/tilt functionality from the helm and engine switches to ensure correct operation.

Troubleshooting & FAQ

How do I know if my trim relay is failing?

Common signs include a clicking sound without motor action when you press the trim switch, the trim system working in only one direction (up or down), or a completely unresponsive trim system. Testing with a multimeter can confirm a faulty relay.

Will this fit my specific engine model?

This relay is designed for a wide range of Mercury, Mariner, and Force outboards, as well as select OMC and Volvo Penta sterndrives. Please check the compatibility table on this page to confirm your specific model and year range before ordering.

My current relay has a different part number. Is it compatible?

This part directly replaces numerous OEM and aftermarket numbers, including Mercury 882751A1, Sierra 18-5849, and American Zettler AZ973-1C-12DC4. Refer to our Part Number Matrix for a comprehensive list of cross-references.

Is installation difficult for a beginner?

Installation is generally straightforward for those with basic mechanical skills, as it is a plug-and-play part. However, due to the importance of correct electrical connections, we recommend professional installation if you are not confident in the process.

What is the difference between an SPST and an SPDT relay?

This is an SPDT (Single Pole Double Throw) relay, which is required for trim systems to reverse the motor's polarity and allow both up and down movement. Using a simpler SPST (Single Pole Single Throw) relay will not work correctly.

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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