We researched and compared the top 2 stroke marine engines on the market. Our evaluation is based on manufacturer specifications, industry standards, and aggregated owner feedback. Whether you need a reliable outboard for a small fishing boat or a powerful engine for a larger vessel, this guide covers the best options.
Each product has been assessed on performance, durability, value, ease of use, and safety. We highlight real limitations so you can choose the right engine for your needs.
| Photo | Product | Score | Buy |
|---|---|---|---|
|
🚗
|
Yamaha 9.9 HP High Thrust Four Stroke (2 Stroke Alternative) Top Pick 9.9 HP, 212cc, 2-cylinder, 25-inch shaft |
9.2 | 🛒 Check Price |
|
🚗
|
Tohatsu 9.8 HP 2 Stroke Outboard Best Value 9.8 HP, 169cc, 2-cylinder, 15-inch shaft |
8.7 | 🛒 Check Price |
|
🚗
|
Mercury 15 HP 2 Stroke Outboard Powerful Performer 15 HP, 295cc, 2-cylinder, 20-inch shaft |
8.4 | 🛒 Check Price |
|
🚗
|
Suzuki 9.9 HP 2 Stroke Outboard Reliable Workhorse 9.9 HP, 169cc, 2-cylinder, 20-inch shaft |
8.1 | 🛒 Check Price |
|
🚗
|
Tohatsu 6 HP 2 Stroke Outboard Lightweight Portable 6 HP, 102cc, 1-cylinder, 15-inch shaft |
7.8 | 🛒 Check Price |
|
🚗
|
Yamaha 15 HP 2 Stroke Outboard Classic Power 15 HP, 246cc, 2-cylinder, 20-inch shaft |
7.5 | 🛒 Check Price |
|
🚗
|
Evinrude E-TEC 25 HP 2 Stroke Outboard High Performance 25 HP, 521cc, 2-cylinder, 20-inch shaft |
7.2 | 🛒 Check Price |
1. Yamaha 9.9 HP High Thrust Four Stroke (2 Stroke Alternative): Top Pick
The Yamaha 9.9 HP High Thrust is a top choice for small boats and sailboats. In our evaluation, it stands out for its exceptional build quality and smooth operation. Owner feedback consistently praises its reliability and ease of starting. The high thrust gearcase provides superior low-end torque, making it ideal for pushing heavy loads or maneuvering in tight spaces.
However, this engine is a four-stroke, not a traditional two-stroke. If you specifically need a two-stroke for its lighter weight or simpler maintenance, this may not be your pick. Also, its premium price may deter budget-conscious buyers. Skip this if you prioritize absolute minimal weight or are on a tight budget.
- Renowned reliability and long service life
- High thrust gearcase for excellent maneuverability
- Lightweight and easy to handle
Pros: Exceptional fuel efficiency; Quiet operation
Cons: Higher initial cost than some competitors
2. Tohatsu 9.8 HP 2 Stroke Outboard: Best Value
The Tohatsu 9.8 HP is a classic two-stroke that delivers reliable performance for small boats, tenders, and fishing crafts. We researched owner reviews and found it praised for its simplicity and ease of maintenance. Its lightweight design makes it a favorite for those who need to frequently mount and dismount the engine.
On the downside, two-stroke engines inherently consume more fuel and produce more emissions than modern four-strokes. Also, some users report that it can be a bit smoky during startup. Skip this if you are environmentally conscious or plan to run the engine for long hours at high throttle; a four-stroke may be better suited.
- Lightweight at only 57 lbs
- Proven two-stroke powerhead
- Easy to maintain and service
Pros: Excellent power-to-weight ratio; Affordable price point
Cons: Not as fuel-efficient as four-strokes
3. Mercury 15 HP 2 Stroke Outboard: Powerful Performer
The Mercury 15 HP is a workhorse for those needing extra power for planing boats or larger dinghies. Based on manufacturer specs and owner feedback, it offers impressive torque and speed. The oil injection system simplifies mixing, though some purists prefer premixing for control.
However, it is heavier than many two-strokes in its class, which can be a drawback for portable use. Additionally, its fuel consumption is higher than four-stroke alternatives. Skip this if weight is a critical factor or if you need an engine for trolling where fuel efficiency matters more.
- Strong acceleration and top speed
- Robust construction for saltwater use
- Oil injection system for convenience
Pros: Great power for its size; Durable lower unit
Cons: Heavier than some competitors
4. Suzuki 9.9 HP 2 Stroke Outboard: Reliable Workhorse
The Suzuki 9.9 HP two-stroke is a solid choice for those who value reliability above all. In our evaluation, it matches the build quality of top Japanese brands. Owner feedback highlights its consistent starting and smooth running, even after years of use.
That said, its design is older, lacking some modern features like oil injection or a high-thrust gearcase. Fuel economy is average for a two-stroke. Skip this if you want the latest technology or need a high-thrust model for heavy loads.
- Reputable Suzuki reliability
- Smooth shifting and operation
- Easy start with manual choke
Pros: Dependable long-term performance; Good parts availability
Cons: Less fuel efficient than newer models
5. Tohatsu 6 HP 2 Stroke Outboard: Lightweight Portable
The Tohatsu 6 HP is perfect for kayaks, small inflatables, and lightweight fishing boats. We researched its specs and it is one of the lightest two-strokes available. Owners appreciate its portability and ease of carrying. It starts reliably and runs smoothly for its size.
However, its single-cylinder design can be a bit rough at idle, and it lacks the power to plane most boats. It is also less durable than larger engines due to higher vibration. Skip this if you need to push a heavy boat or want a smoother ride.
- Ultra-lightweight at 39 lbs
- Single cylinder simplicity
- Compact design for easy storage
Pros: Very portable; Ideal for small inflatables
Cons: Limited power for larger boats
6. Yamaha 15 HP 2 Stroke Outboard: Classic Power
The Yamaha 15 HP two-stroke is a classic that has been around for decades. It offers reliable power for small to medium boats. However, compared to newer models, it is heavier and less fuel efficient. Owner feedback indicates it can be finicky to start when cold.
Its design lacks modern emissions controls, so it may not be legal in some restricted waters. Skip this if you need a lightweight engine or are subject to strict emission regulations. For those with a budget and a need for raw power, it still gets the job done.
- Proven two-stroke design
- Good power for its class
- Easy to service with common tools
Pros: Strong mid-range torque; Widely available parts
Cons: Heavier than modern equivalents
7. Evinrude E-TEC 25 HP 2 Stroke Outboard: High Performance
The Evinrude E-TEC 25 HP is a high-tech two-stroke that offers performance comparable to four-strokes. Its direct injection reduces fuel consumption and emissions significantly. Owners love its instant throttle response and smooth idle.
However, it is no longer in production, and parts availability is declining. Repairs can be costly and require specialized knowledge. Skip this if you want a long-term investment with easy service. For those who find a well-maintained used unit, it can be a thrilling engine.
- Direct injection for cleaner operation
- Excellent power-to-weight ratio
- Advanced digital controls
Pros: Smooth and powerful; Lower emissions than traditional two-strokes
Cons: Expensive and complex to repair
Frequently Asked Questions
Are two-stroke marine engines being phased out?
Many regions have restricted the use of traditional two-stroke engines due to emissions. However, modern direct-injection two-strokes like the Evinrude E-TEC meet current standards. Always check local regulations before purchasing.
What is the best two-stroke outboard for a small boat?
For small boats, a 6-10 HP engine like the Tohatsu 9.8 or Yamaha 9.9 is ideal. They offer a good balance of power and portability. The Tohatsu 6 HP is great for inflatables.
How do I maintain a two-stroke marine engine?
Regular maintenance includes mixing oil and fuel correctly, replacing spark plugs, checking the water pump, and flushing the engine after saltwater use. Follow the manufacturer’s schedule.
Can I use a two-stroke outboard in saltwater?
Yes, but you must flush the engine with fresh water after each use and apply anti-corrosion spray. Some models have better saltwater protection than others.
What is the difference between a two-stroke and four-stroke outboard?
Two-strokes are lighter, simpler, and have more power for their weight, but they are less fuel-efficient and emit more pollutants. Four-strokes are cleaner, quieter, and more fuel-efficient but heavier and more complex.
Our Verdict
After researching and comparing, the Yamaha 9.9 HP High Thrust is our top pick for its unmatched reliability and performance, though it is a four-stroke. For a true two-stroke, the Tohatsu 9.8 HP offers the best value. The Mercury 15 HP is a strong runner-up for those needing more power.
