Upper Motor Mount – Fits Johnson/Evinrude OMC 20-35 HP Outboards 1979-2005
This upper motor mount is engineered for Johnson/Evinrude 20-35 HP, 2-stroke outboards manufactured from 1979 to 2005. It provides essential engine stabilization by absorbing and dampening vibrations, ensuring smoother and more reliable operation.
It serves as a direct replacement for OMC part numbers 325974 / 0325974 and 778211 / 0778211.
- Designed for direct bolt-on installation.
- Constructed with a durable metal housing and rubber bushing to reduce vibration.
- The package includes all necessary hardware for a complete replacement.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand |
Part Number |
| OMC |
325974 / 0325974 |
| OMC |
778211 / 0778211 |
Compatible Engine Models
Confirm your engine model/year in the table below. For Johnson/Evinrude owners, here’s a guide to help you identify your engine’s serial/model: Johnson/Evinrude Serial Number Guide.
| Brand |
Model |
Rated HP |
Stroke |
Years |
OEM Part No. |
| Johnson/Evinrude |
OMC |
20 |
2-Stroke |
1979-2005 |
325974/0325974 |
| Johnson/Evinrude |
OMC |
25 |
2-Stroke |
1979-2005 |
325974/0325974 |
| Johnson/Evinrude |
OMC |
30 |
2-Stroke |
1979-2005 |
325974/0325974 |
| Johnson/Evinrude |
OMC |
35 |
2-Stroke |
1979-2005 |
325974/0325974 |
Technical Specifications
| Specification |
Value |
| Product Type |
Upper Engine Motor Mount |
| Installation |
Direct bolt-on replacement |
| Material |
Metal with rubber bushing |
| Housing Color |
Black |
| Dimensions |
2" × 2.5" × 2" (50.8mm × 63.5mm × 50.8mm) |
| Weight |
0.13 kg (4.6 oz) |
| Mounting |
Upper side motor mount |
| Purpose |
Vibration dampening, engine stabilization |
| Other Technical Attributes |
Designed to absorb and dampen engine vibrations |
Package Contents
- 1 × Upper Motor Mount (325974/0325974)
- 2 × Nuts
- 2 × Washers
Installation Guide
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Safety First: Disconnect the battery and ensure the engine is switched off and cool to the touch.
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Secure the Engine: Properly support and secure the outboard engine to prevent it from shifting or falling during installation.
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Locate the Mount: Identify the upper motor mount on the engine assembly.
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Remove Old Mount: Loosen and remove the nuts and bolts that secure the old motor mount. Carefully extract the mount from its position.
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Clean Surface: Thoroughly clean the mounting surface to remove any dirt, grease, or corrosion.
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Install New Mount: Position the new motor mount correctly, ensuring it aligns with the mounting holes.
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Fasten Securely: Install the provided washers and nuts, tightening them to the manufacturer's recommended torque specifications.
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Final Checks: Reconnect the battery, start the engine, and check for any excessive vibration or unusual noises to confirm proper installation.
Troubleshooting & FAQ
Q: How do I confirm this fits my engine?
A: This mount is compatible with Johnson/Evinrude 20-35 HP 2-stroke outboards from 1979-2005. To ensure a perfect match, cross-reference your engine's original part number with 325974, 0325974, 778211, or 0778211 and consult the detailed compatibility table.
Q: What are the signs of a failing motor mount?
A: Common symptoms of a worn or failed motor mount include excessive engine vibration felt throughout the boat, unusual knocking or clunking noises during operation, and visible cracking, perishing, or deterioration of the mount's rubber bushing.
Q: Is this a direct bolt-on part?
A: Yes, this is a direct bolt-on replacement. It is designed to match the original mount's specifications for a straightforward installation without requiring modifications.
Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
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Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
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Fast Global Shipping: Free delivery worldwide in 5–15 days.
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Direct from Manufacturer: Competitive pricing without compromising quality.