O-Ring and Oil Seals

Oil seals and O-rings are vital components for ensuring the integrity and efficiency of your Evinrude, Johnson, BRP, or OMC outboard motor. Even a small leak can seriously compromise lubrication, causing costly and potentially irreparable damage. Therefore, it's crucial to use high-quality replacement parts specifically designed for your model.

Whether you're looking for a lower unit oil seal, a water pump O-ring, a crankshaft oil seal, or any other type of seal, you'll find the perfect replacement for your engine in our catalog. We offer O-rings and oil seals to cover all your maintenance needs.

To ensure compatibility, always check the original part numbers for your engine. If you have any doubts or need assistance, reach out to our team. Our experienced mechanics are available to provide advice and technical support, helping you identify the correct replacement part and solve any problem.

Don't underestimate the importance of using quality replacement parts. A cheap O-ring or oil seal might seem like a convenient solution, but it often deteriorates quickly, requiring premature replacement and potentially causing more significant engine damage. Investing in quality replacement parts means ensuring a long-lasting seal and protecting your investment. We also stock a range of **industrial seals** to suit your needs.

The Basile Workshop Tip

• Fast Shipping: Receive your parts in 24/48 hours.


• Technical Assistance: A specialized mechanic is available for advice and support.


• Original Spare Parts: Only products from official suppliers, tested and guaranteed.

Remember to regularly check the condition of the lower unit oil and the water pump impeller, as their replacement is often recommended in conjunction with replacing the oil seals for complete and preventative maintenance.

Lower Unit Oil Seal Replacement: Quick Guide

Replacing the lower unit oil seal is an operation that requires care and precision. Here are some fundamental steps:

1. Drain the lower unit oil.


2. Remove the lower unit from the engine.


3. Remove the old oil seal using the appropriate tools.


4. Thoroughly clean the oil seal seat.


5. Install the new oil seal, making sure it is positioned correctly.


6. Reassemble the lower unit and refill with new oil.

If you don't feel confident, consult a qualified mechanic.

FAQ - Frequently Asked Questions

How often should the lower unit oil seals be replaced?

The replacement of the lower unit oil seals depends greatly on the engine's usage and environmental conditions. In general, it is advisable to visually inspect them at least once a year and replace them every 2-3 years, or sooner if oil leaks are noticed.

Can I use a generic O-ring instead of the original one?

It is strongly discouraged. Original O-rings are made of specific materials to withstand the temperatures, pressure, and chemicals present in the engine. A generic O-ring may not be compatible and may cause leaks or more significant damage.

How do I know if an oil seal is defective?

Signs of a defective oil seal include visible oil leaks, oil stains under the engine, a rapidly decreasing lower unit oil level, and, in some cases, abnormal noises coming from the lower unit.

What is the difference between an O-ring and an oil seal?

An O-ring is a ring-shaped seal used to seal between two static surfaces. An oil seal, on the other hand, is designed to seal between a static and a rotating surface, such as a crankshaft. Both are essential to prevent leaks.

What happens if I don't replace a defective oil seal?

If you don't replace a defective oil seal, oil can leak out, causing insufficient lubrication and damage to the internal engine components. This can lead to costly repairs or, in the worst case, engine failure.

Can I replace the oil seals myself, or should I contact a mechanic?

Replacing oil seals can be done yourself if you have experience and the right tools. However, if you are unsure, it is advisable to contact a qualified mechanic to avoid damaging the engine.

What type of grease should I use to lubricate the oil seals during installation?

It is advisable to use a grease specifically designed for oil seals, resistant to water and chemicals present in the engine. This will help protect the oil seal and ensure an optimal seal.

How often should the lower unit oil seals be replaced?

The replacement of the lower unit oil seals depends greatly on the engine's usage and environmental conditions. In general, it is advisable to visually inspect them at least once a year and replace them every 2-3 years, or sooner if oil leaks are noticed.

Can I use a generic O-ring instead of the original one?

It is strongly discouraged. Original O-rings are made of specific materials to withstand the temperatures, pressure, and chemicals present in the engine. A generic O-ring may not be compatible and may cause leaks or more significant damage.

How do I know if an oil seal is defective?

Signs of a defective oil seal include visible oil leaks, oil stains under the engine, a rapidly decreasing lower unit oil level, and, in some cases, abnormal noises coming from the lower unit.

What is the difference between an O-ring and an oil seal?

An O-ring is a ring-shaped seal used to seal between two static surfaces. An oil seal, on the other hand, is designed to seal between a static and a rotating surface, such as a crankshaft. Both are essential to prevent leaks.

What happens if I don't replace a defective oil seal?

If you don't replace a defective oil seal, oil can leak out, causing insufficient lubrication and damage to the internal engine components. This can lead to costly repairs or, in the worst case, engine failure.

Can I replace the oil seals myself, or should I contact a mechanic?

Replacing oil seals can be done yourself if you have experience and the right tools. However, if you are unsure, it is advisable to contact a qualified mechanic to avoid damaging the engine.

What type of grease should I use to lubricate the oil seals during installation?

It is advisable to use a grease specifically designed for oil seals, resistant to water and chemicals present in the engine. This will help protect the oil seal and ensure an optimal seal.