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Power Trim Motor – Fits Yamaha F80A, F80B, F100A, F100C, F100D (Replaces 6D8-43880-09)

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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

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 Power Trim Motor – Fits Yamaha F80A, F80B, F100A, F100C, F100D for 75-100 HP 4-stroke outboard engines. It provides the hydraulic force needed to raise and lower your engine for optimal performance, trailering, and shallow water operation. This unit is built to meet or exceed original equipment specifications, ensuring reliable performance.

This unit directly replaces Yamaha part numbers 6D8-43880-00, 6D8-43880-01, and 6D8-43880-09, as well as aftermarket equivalents like Quicksilver 8M6007566 and ARCO 6258.

  • Features a standard 4-bolt mounting pattern for secure installation.
  • Connects via a 2-wire harness with pre-installed ring terminal ends.
  • Kit includes the essential O-ring and driveshaft coupler for a complete replacement.

Part Number Matrix

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

Brand Part Number Notes
Yamaha 6D8-43880-09 Current OEM Replacement
Yamaha 6D8-43880-01 Superseded by 6D8-43880-09
Yamaha 6D8-43880-00 Superseded by 6D8-43880-01
Quicksilver 8M6007566 Aftermarket Interchange
ARCO 6258 Aftermarket Interchange

Engine & Model Compatibility

Confirm your engine model/year in the table below.

For Yamaha models, please verify your engine's model, horsepower, and specific year against the details provided. While this part fits a range of 75–100 HP models, confirming specifics is essential for a proper fit.

Brand Model(s) Rated HP Stroke Years OEM Part No. Notes
Yamaha F80A, F80B 80 4-Stroke 6D8-43880-09 Supersedes 6D8-43880-00, 6D8-43880-01
Yamaha F100A, F100C, F100D 100 4-Stroke 6D8-43880-09 Supersedes 6D8-43880-00, 6D8-43880-01
Yamaha (Various Models) 75 4-Stroke 2005–UP 6D8-43880-09 According to ARCO fitment data
Yamaha (Various Models) 90 4-Stroke 2005–UP 6D8-43880-09 According to ARCO fitment data

Technical Specs

Product Type
Power Trim Motor
Installation
4-bolt mount
Connection
2-wire connection, Ring Terminal Ends
Dimensions
25.0 cm (L) x 12.0 cm (W) x 13.0 cm (H)
Weight
1.99 kg (4.39 lbs)
Other Technical Attributes
Includes O-ring & Coupler

What’s in the Box

  • 1 x Power Trim Motor (Replaces 6D8-43880-09)
  • 1 x O-ring
  • 1 x Coupler

Installation Notes

  1. Safety First: Disconnect the battery cables at the battery before beginning work.
  2. Access the Motor: Tilt the outboard to the full "up" position and engage the tilt lock lever for safety.
  3. Remove Old Unit: Disconnect the electrical wires. Unbolt and carefully remove the old trim motor, being prepared for potential residual hydraulic fluid.
  4. Prepare Surface: Clean the mounting surface on the trim assembly, ensuring it is free of old gasket material, corrosion, or debris.
  5. Install New Motor: Place the new O-ring on the motor. Mount the new trim motor, ensuring the coupler engages correctly with the pump. Tighten mounting bolts to the manufacturer's recommended torque specifications.
  6. Reconnect & Test: Connect the electrical wires. Reconnect the battery cables. Disengage the tilt lock and test the full range of motion (up and down) to ensure smooth operation and check for any leaks.

Troubleshooting & FAQ

How do I confirm this fits my specific Yamaha engine?

Check the compatibility table on this page. This motor is designed for specific Yamaha 4-stroke models from 75 to 100 HP. The most reliable method is to compare your existing part number to the cross-references listed in our Part Number Matrix (e.g., 6D8-43880-09) and visually match your unit to our photos.

What are common signs of a failing power trim motor?

Symptoms include a slow or jerky trim/tilt operation, a whining or grinding noise from the motor when activated, the motor running but the engine not moving, or complete failure to operate. Fluid leaks around the motor or housing are also a key indicator of a seal failure, often requiring motor replacement.

Does this motor include everything needed for installation?

Yes, this kit includes the motor, the main O-ring for sealing the unit, and the driveshaft coupler. You will reuse your existing mounting bolts. No other hardware or hydraulic fluid is included.

Is this a 2-wire or 3-wire motor?

This is a 2-wire motor with ring terminal ends (typically one blue, one green wire), which is standard for most compatible Yamaha systems. Please verify your existing setup has two wires before ordering.

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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