Yamalube 2M TC-W3 2-Stroke Marine Oil (LUB-2STRK-M1-04) is Yamaha’s premium semi-synthetic two-stroke outboard oil, packaged here in a 1-gallon size. Also searched as Yamaha two stroke oil, Yamalube 2M, Yamaha 2 stroke outboard oil, Yamalube 2 cycle oil, and TCW3 two stroke oil, this formula is built for demanding marine use in Yamaha 2-stroke outboard engines.

NMMA TC-W3-certified Yamalube 2M delivers strong lubrication, anti-wear, anti-rust, and anti-ring-stick protection for two-stroke outboards operating in harsh marine environments. Its semi-synthetic blend and additive package help guard against carbon buildup, ring sticking, internal wear, and corrosion during extended trolling, hard acceleration, and long periods of high-load operation.

This oil is designed for water-cooled 2-stroke outboard engines that require TC-W3 marine oil. It may be used in many Yamaha 2-stroke outboards with oil-injection systems or pre-mix fuel systems when the engine manufacturer’s recommended ratio and oil type are followed.

Important: Yamalube 2M is not recommended for WaveRunner Personal Watercraft or Yamaha Sport Boats. Always follow the oil recommendation listed in your Yamaha owner’s manual for your exact engine or watercraft model.

Yamalube 2M Mixing Ratios

The correct Yamalube 2M mixing ratio depends on whether your Yamaha 2-stroke outboard uses oil injection or pre-mix fuel. Always verify the correct ratio in your Yamaha owner’s manual or service manual before mixing oil and fuel.

Engine Type	Oil-to-Fuel Ratio	Notes
Oil injection / Autolube system	Do not pre-mix unless your manual says to	Fill the oil reservoir with Yamalube 2M; the engine controls oil delivery.
Pre-mix 2-stroke outboard	50:1	About 2.6 oz of oil per 1 US gallon of gasoline for many standard running applications.
Pre-mix break-in period	25:1	About 5.1 oz of oil per 1 US gallon of gasoline for many new-engine break-in procedures. Follow your manual.

Reminder: Mixing ratios can vary by engine model, age, application, and break-in procedure. Use the ratio specified by Yamaha for your exact outboard.

How Much Yamalube 2M Do I Need?

One 1-gallon jug of Yamalube 2M contains 128 oz of oil. At a common 50:1 pre-mix ratio, one gallon of oil treats approximately 50 gallons of gasoline.

Fuel Used	Approximate Oil Needed at 50:1	Seasonal Planning Note
50 gallons of fuel	1 gallon of Yamalube 2M	Typical for light seasonal use.
100 gallons of fuel	2 gallons of Yamalube 2M	Common for regular recreational use.
200 gallons of fuel	4 gallons of Yamalube 2M	Possible for frequent boating or fishing use.
300+ gallons of fuel	6+ gallons of Yamalube 2M	Heavy-use operators should plan extra oil for the season.

If your outboard uses oil injection, actual oil consumption will vary by throttle use, load, trolling time, and engine demand.

Yamalube 2M vs. Yamalube 2W

Yamalube 2M and Yamalube 2W are both Yamaha two-stroke marine oils, but they are not the same product. Use the oil recommended for your engine or watercraft model.

Feature	Yamalube 2M	Yamalube 2W
Certification	NMMA TC-W3	NMMA TC-W3
Formula	Semi-synthetic	Conventional / mineral-based
Best for	Demanding Yamaha 2-stroke outboard use, extended full-throttle operation, trolling, saltwater, and heavy-load conditions	Normal recreational 2-stroke marine use where specified
WaveRunner use	Not recommended for WaveRunner Personal Watercraft or Sport Boats	Check model-specific Yamaha guidance
Anti-ring-stick protection	Enhanced additive package	Standard protection

Is Yamalube 2M the Same as Any TC-W3 Oil?

TC-W3 is a marine two-stroke oil certification standard, not a complete formula specification. Oils that carry TC-W3 certification meet baseline marine performance requirements, but the base oil type, additive package, detergent quality, anti-wear protection, and anti-ring-stick performance can vary by brand and product.

Yamalube 2M is a semi-synthetic TC-W3 oil developed for Yamaha 2-stroke outboards. It is designed to provide stronger protection in high-load marine conditions than a basic generic TC-W3 two-stroke oil. While another TC-W3 oil may meet the minimum standard, Yamalube 2M gives Yamaha owners an OEM-backed option with a formula built around Yamaha outboard operating demands.

What Yamalube 2M Helps Protect Against

• Ring stick: Helps reduce carbon-related deposits that can cause piston rings to stick.
• Carbon buildup: Additives help keep internal components cleaner during repeated marine use.
• Wear: Provides lubrication for high-load two-stroke outboard operation.
• Rust and corrosion: Helps protect internal parts in humid, saltwater, and storage-prone environments.
• Hard acceleration stress: Built for demanding outboard conditions, including hard “out of the hole” acceleration.
• Long trolling periods: Helps support cleaner operation during extended low-speed use.

When to Use Yamalube 2M

• Use in Yamaha 2-stroke outboard engines that call for TC-W3 marine oil.
• Use in oil-injection systems when Yamalube 2M is the specified oil type.
• Use in pre-mix applications at the ratio listed in your Yamaha owner’s manual.
• Use for demanding conditions such as trolling, saltwater use, heavy loads, and high-RPM operation.
• Do not use in WaveRunner Personal Watercraft or Yamaha Sport Boats unless Yamaha documentation for your exact model says otherwise.

Frequently Asked Questions

What is Yamalube 2M oil used for?

Yamalube 2M is used in Yamaha 2-stroke outboard engines that require NMMA TC-W3 marine two-stroke oil. It provides lubrication, anti-wear protection, anti-rust protection, and carbon-control support in demanding marine conditions.

What is the mixing ratio for Yamalube 2M in a 2-stroke outboard?

For many pre-mix Yamaha 2-stroke outboards, the common running ratio is 50:1, or about 2.6 oz of oil per 1 US gallon of gasoline. Some break-in procedures call for 25:1, or about 5.1 oz per gallon. Always follow your Yamaha owner’s manual for your exact engine.

Is Yamalube 2M suitable for pre-mix and oil-injection systems?

Yes, Yamalube 2M can be used in many Yamaha 2-stroke outboards with either pre-mix or oil-injection systems when the engine requires TC-W3 marine oil. For oil-injection systems, fill the oil reservoir and do not pre-mix unless your manual specifically instructs you to.

What is the difference between Yamalube 2M and Yamalube 2W?

Yamalube 2M is a semi-synthetic TC-W3 oil with an enhanced additive package for demanding outboard use. Yamalube 2W is a conventional TC-W3 oil used in certain normal-duty marine applications. Always use the oil Yamaha recommends for your exact engine or watercraft.

Can I use any TC-W3 oil in my Yamaha 2-stroke outboard?

A TC-W3 oil meets the minimum marine two-stroke certification requirement, but not all TC-W3 oils use the same formula or additive quality. Yamalube 2M is Yamaha’s OEM semi-synthetic TC-W3 oil designed for Yamaha 2-stroke outboards and demanding marine conditions.

Can I use Yamalube 2M in my WaveRunner?

No. Yamalube 2M is not recommended for WaveRunner Personal Watercraft or Yamaha Sport Boats. Use the oil recommended in your WaveRunner owner’s manual.

How much fuel does one gallon of Yamalube 2M treat?

At a 50:1 pre-mix ratio, one gallon of Yamalube 2M treats approximately 50 gallons of gasoline. At a 25:1 break-in ratio, one gallon treats approximately 25 gallons of gasoline.

Does Yamalube 2M help prevent ring stick?

Yes. Yamalube 2M includes additives designed to help reduce carbon buildup and guard against ring stick in Yamaha 2-stroke outboard engines.

Yamaha Part Number: LUB-2STRK-M1-04

Size: 1 gallon

Oil Type: Semi-synthetic 2-stroke marine outboard oil

Certification: NMMA TC-W3

Not Recommended For: WaveRunner Personal Watercraft or Yamaha Sport Boats