After researching manufacturer specifications, published industry standards, and aggregated owner feedback, we evaluated the top four stroke outboard motors available. Our comparison focuses on performance, durability, value, ease of use, and safety. Below are our picks to help you choose the right engine for your boat.
| Photo | Product | Score | Buy |
|---|---|---|---|
|
🚗
|
Honda BF250 Top Pick 3.6L V6, 250 hp, 35.5-inch shaft, 577 lbs |
9.2 | 🛒 Check Price |
|
🚗
|
Yamaha F250 Runner Up 4.2L V6, 250 hp, 25-inch shaft, 543 lbs |
8.9 | 🛒 Check Price |
|
🚗
|
Mercury 115 Pro XS Best Mid-Range 2.1L inline 4, 115 hp, 20-inch shaft, 377 lbs |
8.5 | 🛒 Check Price |
|
🚗
|
Suzuki DF140A Best Value 2.0L inline 4, 140 hp, 25-inch shaft, 406 lbs |
8.2 | 🛒 Check Price |
|
🚗
|
Tohatsu MFS9.9A Best Portable 0.3L single cylinder, 9.9 hp, 15-inch shaft, 81 lbs |
7.8 | 🛒 Check Price |
|
🚗
|
Yamaha F6 Best for Kayaks 0.2L single cylinder, 6 hp, 15-inch shaft, 57 lbs |
7.3 | 🛒 Check Price |
|
🚗
|
Mercury 9.9 Pro Kicker Best Trolling Motor 0.3L inline 2, 9.9 hp, 20-inch shaft, 110 lbs |
7.0 | 🛒 Check Price |
1. Honda BF250: Top Pick
The Honda BF250 stands out in our evaluation for its refined engineering and fuel efficiency. Honda’s VTEC and Lean Burn systems deliver strong torque across the RPM range while sipping fuel. Owner feedback consistently praises its reliability and smooth idle. Based on the spec sheet, it offers one of the best power-to-weight ratios in the 250 hp segment.
However, the BF250 commands a premium price that may not suit budget-conscious buyers. We recommend this engine for boaters who prioritize long-term fuel savings and quiet operation. If you need a lower-cost alternative for occasional use, consider other options.
- Advanced VTEC technology for optimal fuel efficiency and power
- Lean Burn system reduces fuel consumption at cruising speeds
- Quiet operation thanks to large intake silencer and rubber mounts
Pros: Excellent fuel economy for its class; Smooth and quiet running
Cons: Higher initial investment compared to competitors
2. Yamaha F250: Runner Up
The Yamaha F250 is a well-rounded outboard that we found competitive with the Honda. Its digital electric steering provides effortless handling, and the variable tumble induction boosts low-end torque. Owner reviews highlight its durability in saltwater environments, supported by Yamaha’s corrosion protection measures.
On the downside, a few users have reported glitches with the electronic systems. This engine is ideal for those who want advanced features and a lighter weight. If you prefer simpler mechanical systems, you might look elsewhere.
- Digital Electric Steering (DES) for precise control
- Variable Tumble Induction for improved torque
- Composite lower cowling reduces weight and corrosion
Pros: Lightweight and compact design; Excellent corrosion resistance
Cons: Some owners report occasional electrical issues
3. Mercury 115 Pro XS: Best Mid-Range
The Mercury 115 Pro XS impressed us with its punchy acceleration and advanced gearcase. Designed for performance boats, it delivers quick planing and solid top speed. Owner feedback indicates it is reliable when properly maintained, and the AMS system keeps vibration low.
However, we found its fuel economy lags behind Honda and Yamaha equivalents. This outboard is best for those who prioritize hole shot and speed over efficiency. If you run long distances at cruising speed, consider a more economical model.
- Command Thrust gearcase for better acceleration
- Advanced MidSection (AMS) reduces vibration
- SmartCraft digital technology integration
Pros: Strong acceleration for its size; Good value for performance
Cons: Not as fuel-efficient as some competitors
4. Suzuki DF140A: Best Value
The Suzuki DF140A offers a compelling balance of price and features. In our research, it stands out for its fuel efficiency, thanks to the Lean Burn Control system. Owner reviews note it starts easily and runs reliably. The engine is also one of the lightest in its class, making it suitable for smaller boats.
That said, we observed that fit and finish are not as polished as Honda or Yamaha. Some owners mention slightly more vibration at idle. This outboard is a great choice for budget-minded boaters who still want modern technology. If you demand the highest refinement, consider spending more.
- Lean Burn Control for improved fuel efficiency
- Dual overhead camshafts for smooth power
- Compact and lightweight design
Pros: Affordable price point; Good fuel economy
Cons: Less refined than premium brands
5. Tohatsu MFS9.9A: Best Portable
The Tohatsu MFS9.9A is a popular choice for tenders and small craft. Weighing only 81 lbs, it is easy to transport and mount. Owner feedback highlights its simplicity and reliability. The integrated flush port simplifies post-use cleaning, which is a nice touch.
However, its single-cylinder design produces more vibration than multi-cylinder engines. It is also not suited for planing hulls or heavy loads. This outboard is ideal for those who need a lightweight auxiliary or primary motor for small boats. If you need more power or smoother operation, look at larger models.
- Ultra-lightweight at 81 lbs
- Integrated carrying handle and tilt mechanism
- Freshwater flush port for easy maintenance
Pros: Very portable and easy to store; Good for dinghies and small sailboats
Cons: Limited power for larger boats
6. Yamaha F6: Best for Kayaks
The Yamaha F6 is one of the lightest four-stroke outboards available. We found it well-suited for kayaks, canoes, and small inflatables. Owner reviews commend its easy starting and quiet operation. The gear shift is smooth, and the weight makes it manageable for one person.
However, with only 6 hp, it is not intended for planing or heavy loads. It is also relatively expensive for its power class. This outboard is best for those who need a lightweight, reliable motor for very small vessels. If you need more thrust, consider a larger model.
- Extremely lightweight at 57 lbs
- Forward, neutral, and reverse gear shift
- CDI ignition for easy starting
Pros: Very portable and easy to handle; Smooth gear shifting
Cons: Low power output
7. Mercury 9.9 Pro Kicker: Best Trolling Motor
The Mercury 9.9 Pro Kicker is designed specifically for trolling and auxiliary use. Our research shows it delivers consistent low-speed performance and can charge onboard batteries. Owner feedback indicates it is reliable for long fishing days. The high-thrust propeller provides good grip at idle speeds.
On the downside, it is heavier than other 9.9 hp models, making portability a challenge. It also carries a premium price for a kicker motor. This outboard is best for anglers who need a dedicated trolling engine with battery charging. If you just need a lightweight portable, the Tohatsu is a better choice.
- High thrust propeller for trolling
- Alternator output for battery charging
- Remote control compatible
Pros: Excellent for trolling and low-speed control; Charges batteries while running
Cons: Heavier than comparable portables
Frequently Asked Questions
What size four stroke outboard do I need for my boat?
The appropriate horsepower depends on your boat’s weight and intended use. A general rule is to have one horsepower per 25-40 lbs of boat weight for planing hulls. For displacement hulls, less power is needed. Check your boat’s capacity plate for maximum horsepower rating. We recommend consulting manufacturer guidelines and owner forums for specific recommendations.
Are four stroke outboards more reliable than two strokes?
Based on aggregated owner feedback and industry data, modern four stroke outboards are generally more reliable due to cleaner combustion and less mechanical stress. They also have longer service intervals. However, they are more complex and can be more expensive to repair. Two strokes are simpler but require more frequent maintenance. We found four strokes to be the better long-term investment for most boaters.
How often should I service my four stroke outboard?
Manufacturer specifications typically recommend annual service or every 100 hours, whichever comes first. This includes oil and filter changes, gear oil replacement, spark plug inspection, and water pump impeller check. Saltwater use may require more frequent flushing and corrosion checks. Always refer to the owner’s manual for your specific model.
Can I use a four stroke outboard in saltwater?
Yes, most four stroke outboards are designed for saltwater use with corrosion-resistant materials and sacrificial anodes. However, we recommend flushing the engine with fresh water after each use and applying anti-corrosion spray. Some brands like Yamaha and Honda have excellent saltwater protection. Check the spec sheet for corrosion warranty details.
What is the difference between a short shaft and long shaft outboard?
Shaft length must match the transom height for proper water flow. Short shafts (15 inches) are for small boats with low transoms, while long shafts (20 inches) fit most standard boats. Extra-long shafts (25 inches) are for sailboats or high transoms. Using the wrong length can cause cavitation or poor cooling. Measure your transom height and consult the manufacturer’s recommendations.
Our Verdict
After comparing specifications, owner feedback, and industry standards, our top pick is the Honda BF250 for its exceptional fuel efficiency, smooth operation, and reliability. The Yamaha F250 is a close runner-up, offering advanced features and lightweight design. For mid-range needs, the Mercury 115 Pro XS delivers strong performance, while the Suzuki DF140A provides the best value. Choose based on your boat size, budget, and intended use.
Last reviewed and spec-checked: February 16, 2026. We re-check our picks and listings periodically.
