Detailed Photos
Installation Instructions
Product Description
Functions of the Labyrinth Seal
1. Prevent Water and Contaminant Ingress
The labyrinth seal acts as a barrier, preventing water, dirt, and other contaminants from entering sensitive areas of the engine, such as the bearing and gearbox compartments. This is particularly important in outboard motors, which operate in water environments. The seal helps prevent saltwater, which is corrosive, from getting into areas where it could cause damage or accelerate wear.
2. Minimize Fluid Leakage
It helps minimize or eliminate the leakage of lubricating oils, grease, or other internal fluids from the engine. Outboard motors rely on proper lubrication for the moving parts, and any leakage could lead to increased wear or overheating. By creating a "labyrinth" of narrow paths, the seal essentially forces any potential leakage to go through a long, twisting route. This helps reduce the possibility of leakage over time.
3. Durability and Corrosion Resistance
Labyrinth seals are typically made of durable materials like rubber, metal, or composite compounds that resist corrosion, wear, and abrasion. This is important in marine environments where saltwater and rough conditions can otherwise degrade components quickly. The design of the labyrinth seal prevents direct contact between parts, which reduces the chances of corrosion and wear.
4. Reducing Friction
The seal provides a certain amount of resistance to friction between the moving parts of the motor, such as the shaft and the outer housing. However, unlike traditional seals that rely on direct contact, a labyrinth seal does this without creating as much friction, leading to less heat generation and reduced wear.
5. Allowing Heat Dissipation
In some designs, the labyrinth structure can also help with the dissipation of heat. By allowing a controlled flow of air or water through its channels, the seal helps regulate the temperature within the engine components. This is important in maintaining the motor's operational efficiency.
6. Self-Cleaning Function
The design of the labyrinth seal, with its complex, multi-stage passageway, helps to self-clean the sealing area. When the motor operates, any buildup of dirt, salt, or debris that enters the labyrinth channel is often expelled or washed out due to the continuous motion of water and the engine parts.
7. Longer Lifespan
Since the labyrinth seal does not rely on a traditional "soft" material that wears down quickly, it often has a much longer lifespan than simpler seals. It can effectively operate for many hours of use in harsh marine environments with minimal maintenance. This contributes to the overall reliability and longevity of the motor.
8. Maintenance-Free Operation
Unlike some traditional seals that may need periodic replacement due to wear and tear, a well-designed labyrinth seal often requires little to no maintenance. Its design prevents direct contact with the moving parts, which minimizes wear and tear over time.
| For |
Description |
Parts number |
Model type / HP |
| YAMAHA |
SEAL,LABYRINTH |
61N-11515-00-PIN |
30HP |
| YAMAHA |
SEAL,LABYRINTH |
61N-11515-01-SEAL |
30HP |
| YAMAHA |
SEAL,LABYRINTH |
63V-11515-01 |
9.9/15HP |
| YAMAHA |
SEAL,LABYRINTH |
63V-11515-02 |
9.9/15HP |
| YAMAHA |
SEAL,LABYRINTH |
656-11515-00 |
25HP |
| YAMAHA |
SEAL,LABYRINTH |
682-11515-00 |
9.9/15HP |
| YAMAHA |
SEAL,LABYRINTH |
689-11515-00 |
30HP |
| YAMAHA |
SEAL,LABYRINTH |
6E5-11447-00 |
115/130/150/175/200/225HP |
| YAMAHA |
SEAL,LABYRINTH |
6F5-11515-00 |
40HP |
| YAMAHA |
SEAL,LABYRINTH |
6H3-11515-00 |
60HP |
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