Yamalube 2-Stroke Marine Motor Oil

Yamaha 2-stroke Outboard Engine Oil Resources and Information

PartsVu.com is happy to offer a wide selection of 2-stroke outboard engine oil formulated to the exact specifications required by your Yamaha 2-stroke outboard motor. Our 2-stroke marine motor oils are available in different quantities, including quarts and gallons, as well as multipacks. So you can save money by buying in bulk. 

We stock our store with a complete range of Yamaha outboard parts to service your Yamaha outboard engine. Looking for other Yamaha outboard engine oils? Browse our selection of 4m and 2m certified Yamaha OEM outboard motor oils.

We also regularly release new helpful resources, like: 

• Yamaha Outboard Service Schedule

• Yamaha Outboard Specs & Capacities Chart

Yamalube 2-Stroke Marine Motor Oil FAQs

Why are genuine Yamalube motor oil kits important? 

Using the correct oil and filter at the recommended intervals is the single most important thing you can do for your Yamaha outboard. For the convenience of our customers, PartsVu has created Yamaha oil change kits for the most common Yamaha outboards. 

Can I use automotive engine oil in my Yamaha outboard engine? 

While many boat owners wonder about this, the short answer is that Yamaha outboard motors are vastly different from your automotive engine, so you’ll want to avoid using regular automotive engine oils. Use an OEM Yamalube marine motor oil specifically formulated for the rigors of the marine environment, like Yamalube 4M engine oil for four-stroke outboards, and Yamalube 2M marine engine oil for two-stroke outboards.

How is Yamalube marine engine oil different?

Yamaha has spent countless hours and resources to ensure that only the best OEM Yamalube marine oil, specifically suited for the harsh marine environment below, goes into your Yamaha outboard engine. PartsVu can confirm that this oil was formulated to withstand the harshest marine environments and most strenuous Yamaha outboard operations. Whether it’s extended full-throttle operation, engine-punishing “out of the hole” acceleration, or hours of trolling, genuine Yamalube engine marine motor oils can handle the job at hand.

Additionally, Yamalube oil delivers superior lubrication and anti-rust protection for outboard engines in marine environments and works to guard against ring stick, carbon buildup, and varnish. Yamalube 4 Stroke engine oils have the best anti-foaming formula available to outboard industry, and unlike passenger car oils, they are certified by the National Marine Manufacturers Association.

How do I service my Yamaha 2-stroke outboard motor?

If your Yamaha 2-stroke outboard motor features oil injection with a remote oil tank inside the boat, you will begin your service by accessing this tank. These remote tanks are not always situated in the easiest-to-reach places, so you may have to consider removing a livewell tub, cooler, or access panel to get to the tank. Loosen the tank from its bracket and locate the oil supply hose that comes from the pump on the tank and heads toward the engine. You should notice a small, white, inline filter that strains the two-stroke oil in route to the engine. This small filter is often overlooked, but without a steady supply of Yamalube two-stroke marine motor oil, your engine will quickly go into reduction mode, or worse. Cut the small zip ties that secure the oil line to the strainer and replace the strainer quickly before you drain oil all over the bilge. This process is a little messy, so a few petroleum sorbent pads can help avoid a mess. Having some good quality nitrile gloves on board the boat or around for your service is also a great idea.

With the tank loosened from its bracket, use a small service flashlight to illuminate the bottom corners of the tank. The clear plastic will allow you to spot any debris or water deposits accumulated inside the tank. If found, you will need to remove the tank, drain it, and clean it. Debris is most often introduced from fill caps being left open, damaged fill cap o-rings, or dirty containers used to purchase bulk oil.

When complete, reinstall the tank into the bracket and remove the cowling from your engine. Use the manual transfer switch on the side of the engine to verify oil is flowing through your new filter and the system is primed. Your Yamaha 2-stroke oil maintenance is now complete. You are ready to begin your engine service.

How do I perform a walk-around inspection on my Yamaha 2-stroke outboard engine?

With the cover off the boat, it’s time for a careful walk-around inspection. Do you notice any leaks under where the boat is sitting? Check specifically below the engine – which has gear lube, engine oil, trim fluid, and gasoline as possible causes for any leaks or stains found below. What about your drain plug area? The presence of algae can indicate that your hull has been slowly dripping water for some time. Thru-hulls at and below the waterline are also very worthy of consideration. Intake grates can be crushed from beaching, trailers, forklifts, or lifting slings. Crushed intake grates will reduce water flow to the equipment they supply. Plastic thru-hull fittings can crack from age and UV exposure, and are especially dangerous for boats that float in the water all the time.

Many boaters do keep their boat in the water during the season, and for those folks, springtime is fresh bottom paint time.

How do I check my Yamaha 2-stroke outboard engine fluids?

Once you are critter-free, the next 2-Stroke Yamaha season breakout step is to evaluate your fluids. Even if you stabilized your fuel and performed a full 100-hour service prior to the layup as Yamaha recommends, there is no telling what might have gone on in the winter months. Pull a large fuel sample by removing your fuel supply line and pumping with the primer bulb into a clear glass container. Check for water or debris. This is also a great time to inspect your fuel supply hoses, clamps, and primer bulb for signs of cracking or wear. Replace as needed. Reconnect your fuel supply line to the engine and pump the primer bulb until it is firm and all engine fuel cavities have been filled.

Check the onboard oil tank and remote oil tank (if applicable) and note if the level appears to be significantly overfull – a possible indication that water contaminated the oil tank. Use a flashlight illuminate the reservoir and look carefully for debris or a waterline. If you did not replace your inline oil filter during your service, now is a great time to do so. Pick up a couple of absorbent mats because there is no “clean” way to do this job.

Gear lube is also worthy of an inspection at this point. While you may have serviced and changed your lower unit lube just before your layup if you didn’t thoroughly “burp” excess air from the lower unit while filling, you may have room for more lubricant after months of sitting. It also gives you one more chance to verify that no water has contaminated the lubricant during the offseason.

How do I flush my Yamaha 2-stroke outboard engine?

With your pre-checks all completed, it is time to connect a hose and move to the helm. Be sure that your flush attachments fit your lower unit appropriately, and remove the lower unit intake screens for the best water pickup. Note that Yamaha SHO engines and lower units with low water pickups in some horsepowers require additional flush block-offs to make sure they don’t suck air. In the absence of the OEM block-off, duct tape works too.

If you have not previously run your engine on a flush attachment, consult your owner’s manuals for specific instructions. From the helm, lower the engine into a normal running position. Verify the garden hose water is fully flowing and the area around the boat and propeller are clear. With the control in neutral and, key lanyard hooked up, turn the key to the “run” position. Check your gauges and observe the voltage reading. Ideally, the reading should be in the 12.6-13.2V range. If lower, charge your starting battery and further investigate. Start the engine and allow it to idle – listening for any abnormal noise or vibration. Verify that the gauges are all working properly, and the engine is charging the on-board battery between 13.6-14.3V. Check for adequate water flow coming from the exhaust and tell-tale stream of your engine. If the engine runs properly on the hose, turn it off and visually re-inspect the engine for leaks after allowing it to sit for a few minutes. Reinstall the cowling, remove the flush (and tape) and get ready to go boating!

What Yamaha oil is available from Yamalube for 2-stroke engines?

Yamalube offers several different types of oil for 2-stroke engines, including:

1. Yamalube 2M: This is a mineral-based 2-stroke oil that is designed for use in Yamaha outboard motors, as well as other 2-stroke engines such as motorcycles, ATVs, and snowmobiles. It is formulated with ashless detergents to keep engines clean and has excellent lubrication properties to reduce wear and extend engine life.

2. Yamalube 2S: This is a semi-synthetic 2-stroke oil that is designed for use in Yamaha outboard motors, as well as other 2-stroke engines. It is formulated with a blend of mineral and synthetic base oils to provide excellent lubrication and reduce smoke and exhaust emissions.

3. Yamalube 2W: This is a premium synthetic 2-stroke oil that is designed for use in Yamaha WaveRunners and other personal watercraft. It is formulated with a high-performance synthetic base oil and advanced additives to provide excellent wear protection and reduce exhaust emissions.

It is important to use the correct type of oil for your engine to ensure optimal performance and longevity. Check your owner's manual or consult with a Yamaha dealer or qualified marine technician to determine the appropriate type of oil for your 2-stroke engine.

What is power robbing ring stick for Yamaha outboard motors?

Ring sticking is a condition that can occur in Yamaha outboard motors (and other engines) where the piston rings become stuck in the piston grooves and do not move freely. This can result in a loss of engine power and performance, as well as increased oil consumption and potentially engine damage if left untreated.

Ring sticking can occur for a variety of reasons, including:

1. Carbon buildup on the piston rings and cylinder walls

2. Excessive wear or damage to the piston rings

3. Improper maintenance or use of the engine, such as running it at high speeds for extended periods of time without proper warm-up or cool-down periods

To prevent ring sticking in Yamaha outboard motors, it is important to follow the manufacturer's recommended maintenance procedures, including regular oil changes, use of high-quality lubricants, and proper warm-up and cool-down periods. If you suspect that your engine is experiencing ring sticking, it is important to have it inspected by a qualified marine technician who can diagnose the issue and recommend appropriate repairs or maintenance.

What is the best oil to run in a Yamaha 2-stroke outboard?

Yamaha recommends using Yamalube 2M or 2W two-stroke oil in their two-stroke outboard engines. These oils are formulated specifically for use in Yamaha two-stroke outboards and are designed to provide excellent wear protection, reduce deposits, and control engine rust and corrosion. They also meet or exceed industry standards such as TC-W3, which ensures that they meet certain performance requirements for use in two-stroke outboards.

It is important to always use the appropriate oil for your specific outboard motor to ensure optimal performance, protection, and longevity. While there may be other high-quality two-stroke oils available on the market, using an oil that is not specifically designed for use in a Yamaha outboard engine could potentially lead to issues with performance, reliability, or warranty coverage.

What kind of oil do you put in a 2-stroke outboard motor?

Two-stroke outboard motors require a special type of oil known as two-stroke oil, which is used to lubricate the engine and prevent it from seizing. There are many different types of two-stroke oil available on the market, but it is important to choose an oil that is specifically designed for use in outboard engines and meets industry standards such as TC-W3.

For Yamaha two-stroke outboards, Yamaha recommends using their Yamalube 2M or 2W two-stroke oil. These oils are formulated specifically for use in Yamaha outboards and are designed to provide excellent wear protection, reduce deposits, and control engine rust and corrosion.

It is important to always use the appropriate oil for your specific outboard motor to ensure optimal performance, protection, and longevity. Using the wrong type of oil could potentially lead to issues with performance, reliability, or warranty coverage.

What's the best 2-stroke oil for a boat?

There are many high-quality two-stroke oils available on the market, and the best oil for a boat depends on several factors, such as the make and model of the engine, operating conditions, and personal preferences. However, it is important to choose an oil that meets industry standards such as TC-W3 and is specifically designed for use in outboard engines.

Some popular brands of two-stroke oil for boats include Yamalube, Quicksilver, Pennzoil, and Amsoil. Each of these brands offers a range of oils designed for different types of outboard engines and operating conditions, such as high-performance engines, saltwater use, or extreme temperatures.

It is important to always follow the manufacturer's recommendations for the type and grade of oil to use in your specific outboard motor to ensure optimal performance, protection, and longevity. Using the wrong type of oil could potentially lead to issues with performance, reliability, or warranty coverage.

Is there a difference between marine and regular 2-stroke oil?

Yes, there is a difference between marine and regular two-stroke oil. Marine two-stroke oil is specifically formulated to meet the demands of outboard engines used in marine environments. It is designed to offer superior lubrication, corrosion protection, and resistance to the harsh operating conditions commonly encountered in saltwater environments.

Marine two-stroke oil often contains special additives that are not found in regular two-stroke oil, such exclusive additives such as rust and corrosion inhibitors, detergents, and dispersants. These additives help to keep the engine clean, prevent deposits and buildup, and protect against rust and corrosion.

In addition, marine two-stroke oil is often formulated to meet industry standards such as TC-W3, which ensures that the oil meets certain performance and environmental standards.

It is important to always use the appropriate oil for your specific outboard motor to ensure optimal performance, protection, and longevity. Using the wrong type of oil could potentially lead to issues with performance, reliability, or warranty coverage.

What's the difference between Yamalube 10w30, Yamalube 10w40, and Yamalube 20w40?

Yamalube 10W-30, Yamalube 10W-40, and Yamalube 20W-40 are all motor oils formulated by Yamaha for use in different types of engines. Here are the differences between them:

1. Yamalube 10W 30: This oil is designed for use in small to medium-sized engines, such as those found in motorcycles, ATVs, and generators. It has a thinner viscosity than Yamalube 10W-40 and provides better fuel efficiency, especially in colder temperatures. However, it may not provide as much protection in high temperatures or under heavy loads.

2. Yamalube 10W-40: This oil is designed for use in a wider range of engines, including motorcycles, ATVs, and outboard motors. It has a slightly thicker viscosity than Yamalube 10W-30, which makes it more suitable for use in high-temperature environments and under heavy loads. It also provides good fuel efficiency and engine protection.

3. Yamalube 20 40: This oil is specifically designed for use in outboard motors and is formulated to provide excellent protection against engine wear, corrosion, and deposits. It has a thicker viscosity than both Yamalube 10W-30 and 10W-40, which makes it more suitable for use in marine environments where engines may be exposed to saltwater and other harsh conditions.

Overall, the main differences between these oils are their viscosity and their intended use. It's important to use the oil that is recommended by your engine manufacturer to ensure optimal performance and protection.

Is Yamaha 4 stroke engine oil 5w30 good for cold weather boating?

Yes, Yamaha 4-stroke engine oil 5W-30 is a good choice for cold weather boating. The "5W" in the oil's name indicates that it has a low winter viscosity, which means it will flow more easily in cold temperatures than oils with higher winter viscosity ratings.

This is important for several reasons. First, a thinner oil will circulate more quickly through the engine on cold starts, providing better protection against wear and tear. Second, a low winter viscosity oil will allow the engine to turn over more easily in cold weather, which can reduce strain on the battery and starter motor.

However, it's important to note that the suitability of any particular oil for cold weather boating will depend on a variety of factors, including the specific engine model, the operating conditions, and the climate. It's always a good idea to consult your owner's manual and/or a trusted mechanic or oil expert to determine the best oil for your particular boating needs.

What is the best aftermarket Yamalube 10w40 equivalent for outboard engines?

For outboard engines, there are several high-quality aftermarket oils that are equivalent to Yamalube 10W 40 oil. Some of the top options include:

1. Mercury 4-Stroke Outboard Oil: This high-quality synthetic blend oil is specifically formulated for use in four-stroke outboard engines. It provides excellent wear protection, minimizes engine deposits, and helps maintain engine cleanliness.

2. Evinrude Johnson 4-Stroke Outboard Oil: This synthetic blend oil is formulated to provide superior protection against engine wear, deposits, and corrosion. It also meets the performance requirements of NMMA FC-W certification.

3. Yamaha Outboard 4-Stroke Oil: This fully synthetic oil is designed to provide maximum protection and performance for Yamaha outboard engines. It provides excellent wear protection, superior engine cleanliness, and improved fuel economy.

Ultimately, the best aftermarket oil that’s equivalent to Yamalube 10W-40 oil for your outboard engine will depend on several factors, including the specific requirements of your engine and your operating conditions. It's always a good idea to consult your owner's manual and/or a trusted mechanic or oil expert before selecting an aftermarket oil for your outboard engine.

What's the shelf life for Yamalube 10w40 fully synthetic oil?

Yamalube 10W-40 fully synthetic oil has a shelf life of approximately 5 years when stored in its original, unopened shipping container and under ideal conditions. Ideal storage conditions for motor oil include a cool, dry place away from direct sunlight and sources of heat, moisture, and contaminants.

Over time, exposure to heat, moisture, and air can cause outboard motor oil to break down and lose its effectiveness. This can result in reduced engine protection and performance. To ensure the best performance from your motor oil, it's recommended to use it within the recommended shelf life and to follow proper storage and handling procedures.

If you are unsure about the age or condition of your motor oil, it's best to replace it with a fresh supply. Using old or expired motor oil can potentially harm your engine and reduce its lifespan.

Will Yamalube 20w40 void my warranty if my engine is rated for 10w30 Yamaha oil?

Using Yamalube 20W 40 oil in an engine that is rated for 10W-30 Yamaha oil is not likely to void your warranty, but it's always best to check with the manufacturer to be sure.

Yamaha recommends using oil with the recommended viscosity and API classification in their engines to maintain optimal performance and to avoid any potential warranty issues. In general, using a different viscosity oil than recommended may not necessarily cause harm to the engine, but it could affect engine performance and could potentially cause warranty claims to be denied.

If you are unsure about which oil to use in your engine, it's best to refer to the Yamaha owner's manual or contact a Yamaha dealer or service center for guidance. They can help you select the right oil for your specific engine and operating conditions to ensure optimal performance and protection.

How long does it take to change the oil for a Yamaha 4-stroke outboard?

The time it takes to change the oil for a Yamaha 4 stroke outboard can vary depending on a number of factors, including the experience level of the person performing the task and the specific model and year of the outboard. However, in general, a basic oil change can typically be completed in about 30-45 minutes.

Quick Guide for Yamaha 4 stroke outboard oil change

Here are the basic steps involved in changing the oil for a Yamaha 4-stroke outboard:

1. Run the engine for a few minutes to warm up the oil, which will make it easier to drain.

2. Turn off the engine and remove the cowling.

3. Locate the oil drain plug and position a drain pan beneath it.

4. Remove the oil drain plug and allow the oil to drain into the pan.

5. Once the oil has drained completely, replace the drain plug and tighten it to the recommended torque specification.

6. Remove the oil filter and replace it with a new one.

7. Apply a thin layer of oil to the gasket on the new oil filter before installing it.

8. Add the recommended amount of new oil to the engine through the oil fill port.

9. Check the oil level using the dipstick and add more oil if necessary.

10. Replace the cowling and start the engine to check for any leaks or other issues.

It's important to follow the specific instructions in the owner's manual for your Yamaha outboard to ensure that you are performing the oil change correctly and safely. If you are unsure about any aspect of the oil change process, it's always best to consult with a Yamaha dealer or other qualified professional for guidance.