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O-Ring Housing Cover Lower Unit
Yamaha 2-5hp 01-15 150-300 2.6L 3.3L 4 Stroke & HPDI 4.2L
| Quantity | Price |
| 1 | 2.99 |
| 5 | 2.69 |
| 10 | 2.39 |
Pro Marine 33M85P O-Ring - Yamaha Outboard Replacement
The Pro Marine 33M85P O-ring is a precision-manufactured sealing component designed as a direct replacement for Yamaha OEM part numbers 93210-33M85-00 and 93210-33M49-00. These OEM O-rings are used throughout Yamaha outboard engines in critical sealing locations such as lower unit housings, shift covers, and related assemblies.
Replacing worn or damaged O-rings during routine service helps prevent water intrusion, oil leaks, and premature component wear. The Pro Marine 33M85P meets or exceeds OEM specifications for marine durability and sealing performance.
OEM Cross Reference
- Replaces Yamaha OEM 93210-33M85-00
- Replaces Yamaha OEM 93210-33M49-00
Compatibility
| Engine Platform | Horsepower Range | Displacement | Application Notes |
|---|---|---|---|
| Yamaha Small Four-Stroke | 2.5-9.9 HP | Single / Twin Cylinder | Used in select lower casing and drive seal locations |
| Yamaha Mid-Range Four-Stroke | 115-150 HP | Inline 4 | Referenced in lower unit and shift cover assemblies |
| Yamaha Large Four-Stroke | 200-250 HP | 3.3L | Commonly used on F200, F225, F250, and related 3.3L platforms |
| Yamaha Large Four-Stroke | 175-300 HP | 4.2L | Used on V6 4.2L platforms including F175, F200, F225, F250, and F300 models |
| Yamaha HPDI | 200-300 HP | 3.3L | Appears in select VMAX and HPDI lower unit assemblies |
Important: Yamaha uses this O-ring across many different engine families, model years, and assembly locations. Always confirm compatibility by matching the OEM part number from your engine's parts diagram before ordering.
Product Features
- OEM-equivalent replacement O-ring
- Designed for Yamaha outboard lower unit and housing sealing applications
- Resistant to oil, heat, saltwater, and marine environments
- Maintains proper compression and long-term sealing integrity
- Ideal for routine service, resealing, and preventative maintenance
Commonly Used In Yamaha Outboards
- Yamaha F200, F225, F250 four-stroke models
- Yamaha 3.3L four-stroke platforms
- Yamaha 4.2L V6 four-stroke platforms
- Select Yamaha mid-range and high-horsepower outboards
Frequently Asked Questions
What Yamaha OEM parts does this replace?
The Pro Marine 33M85P replaces Yamaha OEM part numbers 93210-33M85-00 and 93210-33M49-00.
What engines does this O-ring fit?
This O-ring is used across a wide range of Yamaha four-stroke outboards, including small engines, mid-range inline four models, and larger 3.3L and 4.2L platforms. Fitment varies by engine model, year, and assembly location.
Is this an OEM Yamaha part?
No. This is a Pro Marine brand aftermarket replacement part designed to meet or exceed Yamaha OEM specifications.
Where is this O-ring typically used?
This O-ring is commonly found in lower unit housings, shift covers, and related sealing interfaces where preventing water intrusion and maintaining oil containment is critical.
Should I replace this O-ring during service?
Yes. O-rings should always be replaced when components are disassembled. Reusing old seals can lead to leaks, corrosion, and premature mechanical failure.
Does this part fit 3.3L and 4.2L Yamaha engines?
Yes. This O-ring is used on both 3.3L and 4.2L Yamaha four-stroke engine platforms in select assemblies. Always confirm using your engine's OEM parts diagram.
Do I need any special tools to install this O-ring?
No special tools are required. Lightly lubricate the O-ring with clean gear oil or marine grease before installation and ensure sealing surfaces are clean.
Alternate Names & Search Terms
This part may also be searched as:
- Yamaha lower unit O-ring
- Yamaha shift cover O-ring
- Yamaha gearcase O-ring
- Yamaha 33M85 O-ring
- 93210-33M85-00 O-ring
- 93210-33M49-00 O-ring
Summary: Pro Marine 33M85P is an aftermarket replacement O-ring for Yamaha OEM 93210-33M85-00 and 93210-33M49-00, used in lower unit and shift cover sealing applications on Yamaha four-stroke outboards, including 3.3L and 4.2L platforms.