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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.
93210-33M49-00
93210-33M85-00
814496M
814496M
82263M
82263M
93210-09156-00
93210-09165-00
93210-09350-00
93210-09729-00
93210-09754-00
93210-09811-00
93210-07003-00
93210-07435-00
93210-07540-00
93210-07890-00
Yamaha Upper Driveshaft Seal 28019
The 28019 Upper Driveshaft Seal replaces Yamaha OEM part numbers 93101-28019-00, 93101-28018-00, and 93101-28004-00. This seal is used in Yamaha lower unit gearcases to prevent water intrusion and retain gear lube around the driveshaft.
Fitment Overview
This seal is confirmed through Yamaha OEM lower unit diagrams and is used across both 4.2L V6 and 5.3L V8 outboard platforms. It is installed at the top of the driveshaft in the gearcase assembly.
Compatibility
| Engine Model | Horsepower | Engine Platform |
|---|---|---|
| F200 / LF200 | 200 HP | 4.2L V6 |
| F225 / LF225 | 225 HP | 4.2L V6 |
| F250 / LF250 | 250 HP | 4.2L V6 |
| VF200 / VF225 / VF250 | 200–250 HP | 4.2L SHO |
| F300 / LF300 | 300 HP | 4.2L V6 & 5.3L V8 |
| F350 / LF350 | 350 HP | 5.3L V8 |
Fits These Serial Ranges
This seal is used across multiple Yamaha gearcase generations and is not limited to a single serial break. It is commonly found in:
- 4.2L V6 outboards (modern production models)
- 5.3L V8 F300 and F350 models beginning in 2007
Important: Because Yamaha uses multiple seal variations depending on gearcase design, always verify using your exact model and serial number before ordering.
Part Numbers and Cross References
| Type | Part Number |
|---|---|
| Pro Marine | 28019 |
| Yamaha OEM | 93101-28019-00 |
| Replaces | 93101-28018-00 |
| Replaces | 93101-28004-00 |
| Application | Upper Driveshaft Seal |
What This Part Is Used For
This seal sits at the top of the driveshaft inside the lower unit, forming a barrier between the gearcase oil and external water exposure.
- Prevents water intrusion into the gearcase
- Retains gear lube under pressure
- Protects gears and bearings from contamination
- Critical for lower unit longevity
Failure of this seal can result in water-contaminated gear oil, corrosion, and expensive gearcase damage.
FAQ
Where is this seal located?
At the top of the driveshaft inside the gearcase assembly.
What happens if this seal fails?
Water enters the gearcase, causing milky oil and potential gear damage.
Is this used on both 4.2L and V8 Yamaha engines?
Yes, this seal is used across both platforms depending on gearcase design.
Do I need special tools to replace it?
Yes, lower unit disassembly and seal drivers are typically required.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 (continental U.S.).
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1–5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Items must be new, unused, and in original packaging.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Part Numbers
28019, 93101-28019-00, 93101-28018-00, 93101-28004-00, Yamaha F225 seal, F250 seal, VF225 VF250 seal, F300 F350 driveshaft seal
93101-28018-00
93101-28019-00
69J-45332-00-94
6D0-45332-00-94
90282-04010-00
63D-45361-01-4D
63D-45361-02-4D
63D-45361-02-8D
6D1-45332-00-94