Yamaha Oils - Selection Guide

The Lifeblood of Your Yamaha Outboard

It’s no secret that your motor is the heart of your boat, but it’s not going to get you very far without the right oil to lubricate all of the critical parts and components.

With decades of industry experience, focused engineering, and innovation, Yamaha has gained valuable knowledge about the importance of the relationship between oil and mechanical components. That’s why Yamaha’s brand of outboard lubricants is the best choice for their entire line of outboard engines.

Yamaha offers a range of high-quality oils specifically designed for use in Yamaha outboards and marine products. To help you find the suitable oils for your Yamaha outboard motor, we’ll cover the following topics in detail:

Selecting the Right Oils for My Yamaha Outboard Motor?

Yamaha Two-Stroke Outboard Engines
Yamaha Four-Stroke Outboard Engines
Lower Unit Oil / Gearbox Oil

Finding Your Yamaha Outboard Engine Oil Specifications
Yamaha Oils vs Aftermarket Oils - What’s the Difference?
Using OEM Yamaha Oil Change Kits
Yamaha Outboard Schematics at Snap-On EPC
Learn More with Yamaha Online Parts
Yamaha Outboard Oils FAQ
Purchase Yamaha Oils at Yamaha Online Parts

Selecting the Right Oils for My Yamaha Outboard Motor?

To help you select the right oil for your Yamaha engine, the following are the most common types of OEM Yamalube oils used in Yamaha outboards:

Yamaha Two-Stroke Outboard Engines

Yamaha two-stroke oil is available in the following varieties:

Yamaha Yamalube 2M FC-W Two-Stroke Outboard Oil: This Yamaha marine oil is designed for use in two-stroke outboard engines and provides excellent protection against wear and corrosion.
Yamalube 2M Outboard Mineral Oil: This conventional mineral-based outboard oil is designed to provide reliable lubrication and protection for Yamaha two-stroke outboard motors. It is recommended for use in all Yamaha two-stroke outboards that require FC-W-certified oil.
Yamalube 2M Outboard Synthetic Oil: This is a synthetic blend outboard oil that is specifically designed for high-performance Yamaha two-stroke outboard motors. It provides superior lubrication and protection in extreme operating conditions and is recommended for use in high-performance two-stroke outboards.
Yamalube 2M Outboard TC-W3 Oil: This is a conventional outboard oil that meets the TC-W3 standard, which is a performance specification established by the National Marine Manufacturers Association (NMMA) for two-stroke outboard oils. It is recommended for use in all two-stroke outboards, including Yamaha two-stroke outboard motors.

It is important to consult your owner's manual or a qualified Yamaha dealer to determine the appropriate type of Yamalube two-stroke outboard oil for your specific outboard motor, as different models may have different requirements. Using the correct type of oil can help ensure proper lubrication and protection of your two-stroke outboard motor, and can help extend the life of the engine.

Yamaha Four-Stroke Outboard Engines

Yamaha four-stroke oil is available in the following varieties:

Yamaha FC-W 10W-30 4-Stroke Marine Oil: This oil is designed for use in four-stroke outboard engines and is formulated to meet the demanding requirements of marine environments. It provides excellent protection against wear, rust, and corrosion and is suitable for use in engines with the following designations: F25-F350.
Yamaha FC-W 10W-30 High-Performance 4-Stroke Marine Oil: This oil is designed for use in high-performance four-stroke outboard engines and provides advanced protection against wear, rust, and corrosion. It is suitable for use in engines with the following designations: F150-F350.
Yamalube® 4M 4-Stroke Marine Oil: This is a conventional mineral-based marine oil that is recommended for use in all Yamaha four-stroke outboard motors. It is designed to provide reliable lubrication and protection for the engine, and is recommended for use in normal operating conditions.
Yamalube® 4M 4-Stroke Performance Blend Marine Oil: This is a synthetic blend marine oil that is specifically designed for high-performance Yamaha four-stroke outboard motors. It provides superior lubrication and protection in extreme operating conditions and is recommended for use in high-performance four-stroke outboards.
Yamalube® 4M 4-Stroke Outboard Oil: This is a full synthetic marine oil that is recommended for use in all Yamaha four-stroke outboard motors. It provides superior lubrication and protection in extreme operating conditions and is designed to extend the life of the engine.
Yamalube® 4M FC-W® Synthetic 10W-30 Oil: This is a synthetic blend marine oil that meets the FC-W® certification standard. It is recommended for use in all Yamaha four-stroke outboard motors and provides superior lubrication and protection for the engine.
Yamalube® 4W 4-Stroke Performance Blend Marine Oil: This is a synthetic blend marine oil that is specifically designed for high-performance Yamaha four-stroke outboard motors. It provides superior lubrication and protection in extreme operating conditions and is recommended for use in high-performance four-stroke outboards.
Yamalube® 4W 4-Stroke Outboard Oil: This is a full synthetic marine oil that is recommended for use in all Yamaha high-performance four-stroke outboard motors. It provides superior lubrication and protection in extreme operating conditions, and is designed to extend the life of the engine.
Yamalube® 4W FC-W® Synthetic 10W-30 Oil: This is a synthetic blend marine oil that meets the FC-W® certification standard. It is recommended for use in all Yamaha high-performance four-stroke outboard motors and provides superior lubrication and protection for the engine.

Lower Unit Oil / Gearbox Oil

Yamaha Yamalube Outboard Gear Lube: This oil is designed for use in outboard gearcases and provides excellent protection against wear and corrosion. It is suitable for use in all Yamaha outboards. Choose from the following types of Yamalube gear lube:

Yamalube® Gearcase Lube (SAE90): This is a high-performance mineral-based gear lube that is recommended for use in all Yamaha outboard models. It is designed to provide excellent protection against wear, corrosion, and oxidation, even under extreme operating conditions.
Yamalube® Gearcase Lube HD (SAE80W-90): This is a synthetic blend gear lube that is specifically designed for high-performance Yamaha outboard motors. It provides superior protection against wear, corrosion, and oxidation, and is recommended for use in high-speed or heavy-load applications.
Yamalube® Gearcase Lube (SAE80): This is a synthetic blend gear lube that is recommended for use in Yamaha outboard motors that require a lower viscosity gear lube, such as those used in colder climates or lighter-duty applications.
Yamalube® Gearcase Lube (Semi-Synthetic): This is a semi-synthetic gear lube that is recommended for use in all Yamaha outboard models. It provides excellent protection against wear, corrosion, and oxidation, and is designed to extend the life of the lower unit.

It is important to consult your owner's manual or a qualified Yamaha dealer to determine the appropriate type of Yamalube Outboard Gear Lube for your specific outboard motor, as different models may have different requirements. Using the correct type of gear lube can help ensure proper lubrication and protection of your lower unit components, and can help extend the life of your outboard motor.

Finding Your Yamaha Outboard Engine Oil Specifications

To find the oil specifications for your Yamaha outboard, follow these steps:

Check the owner's manual: The most accurate and reliable source of information about your Yamaha outboard and its oil requirements is the owner's manual. It should contain all the necessary details, including the recommended oil type, viscosity, and capacity.
Check the Yamaha website: Yamaha's website also provides information on the recommended oil specifications for their outboard motors. Go to the Yamaha Marine website and navigate to the "Owner Resources" section, then select "Service and Maintenance" and "Maintenance Specifications." You will need to enter the model and year of your outboard to access the relevant information.
Contact Yamaha customer service: If you are unable to find the information you need, you can contact Yamaha customer service directly. They can provide you with the necessary details, including the recommended oil type, viscosity, and capacity for your specific outboard model.

It's important to use the recommended oil type and viscosity for your Yamaha outboard to ensure optimal performance and protection. Using the wrong type of oil or viscosity can lead to engine damage and may void your warranty. Always refer to the owner's manual or contact Yamaha customer service if you have any questions or concerns about your outboard's oil specifications.

Yamaha Oils vs Aftermarket Oils - What’s the Difference?

You might think it’s acceptable to toss any old oil into the tank and you’ll be good to go. While this may work for a while, but eventually it’s going to have a negative impact on your motor. This is precisely why there are so many Yamaha oils to choose from, each of which has a specific purpose.

The Disadvantages of Using Aftermarket Oil in Your Yamaha Outboard

Using aftermarket oil in a Yamaha outboard motor may have several potential disadvantages, including:

Compatibility Issues: Aftermarket oils may not be specifically formulated to meet the unique requirements of Yamaha outboard motors. This could lead to issues with compatibility, reduced performance, or increased wear and tear on engine components.
Reduced Performance: Yamaha outboard motors are designed to perform at a high level, and the use of an aftermarket oil may reduce the engine's performance. For example, an oil with the wrong viscosity or additives could negatively affect the engine's fuel economy, acceleration, or overall power output.
Increased Wear and Tear: Using an oil that is not specifically formulated for Yamaha outboard motors could lead to increased wear and tear on engine components. Over time, this could cause damage to the engine and lead to costly repairs or replacement.
Warranty Issues: Using aftermarket oil could void the warranty on your Yamaha outboard motor. If the engine experiences problems due to the use of an incompatible or improper oil, Yamaha may not cover the costs of repairs under warranty.

Unknown Quality: Aftermarket oils may not undergo the same rigorous testing and quality control as oils specifically designed for Yamaha outboard motors. This means that the quality of the oil may be unknown, and it may not provide the same level of protection and performance as a recommended oil.

Using OEM Yamaha Oil Change Kits

Yamaha Oil Change Kits for outboard motors typically include all of the necessary components for a complete oil change, including:

Engine Oil: The kit will include the appropriate type and quantity of Yamalube engine oil for your specific outboard motor. This may be either two-stroke or four-stroke oil.
Oil Filter: For four-stroke outboard motors, the kit will typically include an oil filter that is designed to fit your specific engine model. The oil filter helps remove contaminants from the oil and ensures that the engine is properly lubricated.
Drain Plug Gasket: The kit will include a new drain plug gasket, which helps prevent oil leaks and ensures a tight seal when the oil is drained and refilled.
Gearcase Lube: Some Yamalube kits also include gearcase lube, which is used to lubricate the lower unit gearbox. This is an important component for ensuring smooth operation and reducing wear and tear on the gears and bearings.

Yamalube oil change kits are designed to provide all of the necessary components for a complete oil change and ensure that the correct type and quantity of oil is used for your specific outboard motor.

Yamaha Online Parts offers Oil Change Kits for all engine models. Some of the most popular Yamaha oil change kits include the following models:

Yamaha Outboard Schematics at Snap-On EPC

If you’re changing your oil, servicing your engine, or any other maintenance task for your Yamaha Outboard, you should know that there are plenty of online schematics available via Yamaha Engine Schematic database (powered by Snap-On Electronics Parts Catalog / Snap-On EPC). These schematics are designed to help you find the right parts number and order on Yamaha Online Parts.

Learn More with Yamaha Online Parts

Yamaha Online Parts offers plenty of resources for DIY boaters to install, replace, and repair their outboard motor with Yamaha OEM Parts. Search our blog, or start with the following to learn more about everything you need to know about your Yamaha outboard:

Yamaha Outboard Oils FAQ

How often should I change my engine oil in a Yamaha outboard motor?

The recommended oil change interval for a Yamaha outboard motor depends on several factors, including the model of the outboard, the type of oil used, and the operating conditions of the motor. In general, Yamaha recommends changing the engine oil in their outboard motors every 100 hours of operation or once a year, whichever comes first.

However, if the outboard motor is used in harsh conditions, such as saltwater or extreme temperatures, the oil change interval may need to be shortened. Yamaha recommends that outboard motors used in severe operating conditions should have the oil changed every 50 hours of operation or every six months, whichever comes first.

What’s the best 2-stroke outboard oil for Yamaha outboard motors?

For Yamaha outboard motors, the best 2-stroke oil to use is Yamalube 2M. This oil is specifically formulated by Yamaha for use in their 2-stroke outboard motors and provides excellent protection against wear, deposits, and corrosion. Additionally, it is a high-quality oil that is designed to meet the specific lubrication needs of Yamaha outboards, ensuring optimal performance and protection.

It's always a good idea to refer to your Yamaha owner's manual for specific recommendations and to use the oil recommended by the manufacturer to ensure the best performance and protection for your outboard motor.

Can you fill lower unit oil from top in an outboard motor?

It depends on the specific outboard motor, but in general, most outboard motors are designed to have their lower unit oil (also called gear oil or lower gearcase oil) filled from the bottom of the lower unit. This is because the oil is intended to fill the lower unit completely and displace any air pockets or bubbles that might otherwise cause damage to the gears.

However, some outboard motors may have a fill hole located at the top of the lower unit that can be used to add oil. In these cases, it's important to follow the manufacturer's instructions and use the correct type and amount of oil. It's also a good idea to check the oil level with a dipstick or sight glass after filling to ensure that the oil level is correct.

Where can I find my Yamaha 2-stroke outboard lower unit oil capacity?

You can find the Yamaha 2-stroke outboard lower unit oil capacity in the owner's manual for your specific outboard model. The oil capacity information can also be found on Yamaha's website and in the specifications section for your outboard model. Additionally, you can contact a Yamaha dealer or the Yamaha customer service team for assistance in finding the oil capacity information for your specific model.

It's important to use the correct amount of oil in the lower unit of your outboard motor to ensure proper lubrication and to avoid damage to the engine. Overfilling or underfilling the lower unit with oil can cause issues with the performance of your outboard motor.

Can I use automotive engine oil in my Yamaha outboard?

It is not recommended to use automotive engine oil in your Yamaha outboard motor. Automotive engine oils are designed for use in cars and trucks, and may not provide the appropriate level of lubrication, corrosion protection, or temperature performance required for marine outboard engines. Using automotive engine oil in a Yamaha outboard motor may result in reduced performance, increased wear and tear, and may also void your engine warranty.

Furthermore, the operating conditions of outboard engines are different from those of automotive engines. Marine engines, especially those used in saltwater environments, are exposed to harsh conditions, including high humidity, high temperatures, and saltwater corrosion. Outboard motor oil is specifically formulated to withstand these conditions and provide the necessary protection to the engine components.

What's the difference between Yamaha two-stroke engine oil and Yamaha four-stroke engine oil in Yamaha outboard engines?

The main difference between two-stroke engine oil and four-stroke engine oil in Yamaha outboard engines is the way in which the oil is used and the type of engine that requires each oil.

A two-stroke engine oil is designed for use in two-stroke outboard engines, which require oil to be mixed with fuel before being added to the fuel tank. The oil and fuel are mixed in a specific ratio and the resulting mixture is then used to lubricate the engine's moving parts, such as the piston and cylinder.

On the other hand, four-stroke engine oil is designed for use in four-stroke outboard engines, which have a separate oil reservoir that is used to lubricate the engine's moving parts. The oil is not mixed with fuel and is instead circulated through the engine to lubricate the parts that need it.

It is important to use the correct type of oil for your Yamaha outboard engine to ensure optimal performance and longevity. Using the wrong type of oil can result in poor performance, engine damage, and even engine failure.

Purchase Yamaha Oils at Yamaha Online Parts

In conclusion, selecting the right oil for your Yamaha outboard motor is essential to ensure its longevity and performance. Yamaha offers a range of high-quality oils specifically designed for use in Yamaha outboards and marine products, offering superior lubrication and anti-rust protection for engines operating in demanding marine environments.

Looking where to buy Yamalube products and Yamaha OEM Parts? No matter which Yamaha Oil, OEM parts, and products you need to keep your Yamaha outboard engine running smoothly, Yamaha Online Parts has what you need. We carry a full catalog of Yamaha lower unit components to fit any engine model and year.

If you need assistance or have any questions, don’t hesitate to reach out to us at support@Yamahaonlineparts.com. We’ll be sure to get back to you as soon as possible. We’re also proud to offer international shipping to select countries. Whether you’re located in Seattle, San Diego, Florida, and more, we’ll ship your Yamaha Outboard and Marine parts right to your door.

Proper Yamaha outboard engine maintenance requires Genuine OEM Yamaha parts. Trust the experts at Yamaha Online Parts for all your outboard engine needs.