M-Y Wedge Outboard Motor Support – Fits Mercury, Yamaha, Evinrude/Johnson, Honda, Suzuki, Tohatsu (Replaces HeuroFosh 23TS, M-YM123)
M-Y Wedge Outboard Motor Support – Fits Mercury, Yamaha, Evinrude/Johnson, Honda, Suzuki, Tohatsu (Replaces HeuroFosh 23TS, M-YM123) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
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M-Y Wedge Outboard Motor Support – Fits Mercury, Yamaha, Evinrude/J...
M-Y Wedge Outboard Motor Support – Fits Mercury, Yamaha, Evinrude/Johnson, Honda, Suzuki, Tohatsu (Replaces HeuroFosh 23TS, M-YM123) is backordered and will ship as soon as it is back in stock.
Product Details
This innovative M-Y Wedge Outboard Motor Support – Fits 3-RAM Trim/Tilt Systems forms a cushioned, stable platform for safe and dependable boat trailering. Constructed from EPDM rubber and high-tech plastic, it's designed to fit over the outboard's trim/tilt piston on Mercury, Yamaha, Evinrude/Johnson, Honda, Suzuki, and Tohatsu outboard motors with 3-RAM trim/tilt systems, preventing "trailer shock" and providing proper support during transport.
This part is a direct aftermarket replacement for HeuroFosh 23TS and M-YM123.
- Fits over the outboard's trim/tilt piston for simple installation.
- Constructed from UV protected and saltwater-safe materials for enhanced durability.
- Provides a universal fit for most major outboard brands using 3-RAM systems.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number |
|---|---|
| Sea Sierra | M-YM123 |
| HeuroFosh | 23TS |
Engine & Model Compatibility
Confirm your engine model and horsepower rating in the table below. This part is designed specifically for engines equipped with a 3-RAM trim/tilt system.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury | Outboards with 3-RAM trim/tilt | 135-300 HP | 2- & 4-Stroke | M-YM123 | Including all Pro XS models |
| Yamaha | Standard & SHO Outboards | 115-350 HP | 2- & 4-Stroke | M-YM123 | Includes new SHO models |
| Evinrude/Johnson | Outboards with 3-RAM trim/tilt | 150-300 HP | 2- & 4-Stroke | M-YM123 | Except Generation 2 |
| Honda | Outboards with 3-RAM trim/tilt | 90-300 HP | 4-Stroke | M-YM123 | |
| Suzuki | Four-stroke outboards | DF140-DF350 | 4-Stroke | M-YM123 | |
| Tohatsu | Outboards with 3-RAM trim/tilt | 115-250 HP | 2- & 4-Stroke | M-YM123 | Trim limiter may need adjustment |
Technical Specs
- Product Type
- Outboard Motor Support
- Installation
- Fits over trim/tilt piston
- Connection
- Direct mount to trim/tilt system
- Housing Material
- EPDM rubber and high-tech plastic
- Housing Color
- Black
- Dimensions
- 3" H × 5" W × 11.25" L (76.2 × 127 × 285.75 mm)
- Weight
- 1 lb (0.45 kg)
- Fitting Type
- Universal fit for 3-RAM trim/tilt systems
- Other Technical Attributes
- UV protected, saltwater safe
What’s in the Box
- 1 × M-Y Wedge Outboard Motor Support (M-YM123)
Installation Notes
- Tilt the outboard motor to the full "up" position to access the trim/tilt rams.
- Clean the hydraulic trim/tilt pistons to ensure they are free of dirt and debris.
- Securely slide the M-Y Wedge over one of the outboard's trim/tilt pistons.
- Slowly lower the engine until it makes firm, cushioned contact with the wedge.
- Check that the motor is snug and stable on the support. Do not apply excessive hydraulic pressure.
- Always remove the support wedge before launching the boat or starting the engine.
Troubleshooting & FAQ
How do I know if this wedge fits my specific engine?
This support is designed for outboard motors that use a 3-RAM trim/tilt system. Please check the compatibility table to confirm that your engine's brand and horsepower range are listed. Do not use this product on single-ram or 2-RAM systems.
Can this damage my engine's hydraulic system?
No, it is designed to protect the hydraulic system. By absorbing road shocks and preventing the engine from bouncing during trailering, it reduces stress on the trim/tilt seals and mechanics.
What is the difference between this and an OEM trailering bracket?
Our wedge provides a universal, durable, and cost-effective solution. It is made from a resilient EPDM rubber and high-tech plastic composite that is both UV and saltwater resistant, offering broad compatibility and excellent shock absorption compared to some brand-specific clips or blocks.
Can I leave the wedge on while my boat is in the water?
No. The M-Y Wedge is engineered for trailering support only. It must be removed before launching the boat and operating the engine to allow for normal trim/tilt functionality.
My Tohatsu outboard has a trim limiter. Will this wedge still work?
Yes, it is compatible. However, you may need to adjust the factory trim limiter to allow the engine to tilt high enough to properly seat and secure the wedge on the trim ram.
How can I tell if the wedge needs to be replaced?
You should inspect the wedge periodically for any signs of cracking, deep compression, or material degradation. If you notice any significant damage or deformation, replace it to ensure safe trailering.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It has been built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, it is batch-inspected for consistency and quality.
Shipping speed & cost
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options will appear at checkout where available for your region.
Warranty & returns
This product is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, please contact our support team with your order details. Returns are accepted within our standard window, provided the item is unused and in its original condition. See our official policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement component, not an OEM part.
- Professional installation is recommended for safety and performance.
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 — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or quality control.
Payment & Security
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