After researching manufacturer specifications, published industry standards, and aggregated owner feedback, we compared the leading 40hp outboard motors on the market. Our evaluation focuses on performance, durability, ease of use, and safety to help you choose the right engine for your boat.
| Photo | Product | Score | Buy |
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Yamaha F40LB Top Pick 40HP, 4-stroke, EFI, 3-cylinder, 747cc, 25-inch shaft |
9.2 | 🛒 Check Price |
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Suzuki DF40A Runner Up 40HP, 4-stroke, EFI, 3-cylinder, 738cc, 20-inch shaft |
8.8 | 🛒 Check Price |
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Mercury 40 HP FourStroke EFI Best Value 40HP, 4-stroke, EFI, 3-cylinder, 747cc, 20-inch shaft |
8.4 | 🛒 Check Price |
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Honda BF40D Quietest 40HP, 4-stroke, EFI, 3-cylinder, 738cc, 20-inch shaft |
8.7 | 🛒 Check Price |
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Tohatsu MFS40A EPTL Lightweight 40HP, 4-stroke, EFI, 3-cylinder, 698cc, 20-inch shaft |
8.1 | 🛒 Check Price |
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Evinrude E-TEC 40 HP Two-Stroke Power 40HP, 2-stroke, direct injection, 2-cylinder, 864cc, 20-inch shaft |
7.8 | 🛒 Check Price |
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Parsun 40 HP Outboard Motor Budget Friendly 40HP, 2-stroke, carbureted, 2-cylinder, 703cc, 20-inch shaft |
7.3 | 🛒 Check Price |
1. Yamaha F40LB: Top Pick
The Yamaha F40LB is a standout in the 40hp class, offering refined 4-stroke performance with electronic fuel injection. Based on owner feedback, it delivers reliable starting and smooth power across the rpm range. Its lightweight construction makes it a top choice for smaller boats and those who frequently trailer their vessel.
However, the F40LB comes at a higher cost compared to some competitors, which may deter budget-conscious buyers. If you prioritize long-term reliability and are willing to invest, this is an excellent choice. But if cost is a primary concern, you might want to consider other options.
- Electric start with remote control for effortless operation
- Lightweight design at 109 kg for easy handling
- High-thrust gearcase for superior hole shot and maneuverability
Pros: Smooth and quiet operation with excellent fuel efficiency; Reliable starting and consistent performance
Cons: Premium price point may not suit all budgets
2. Suzuki DF40A: Runner Up
The Suzuki DF40A is a well-rounded outboard that combines fuel-saving lean-burn technology with a compact design. Our research into owner feedback highlights its corrosion-resistant materials, making it a solid choice for saltwater anglers. The engine starts reliably and runs smoothly at cruising speeds.
One limitation noted in owner reviews is a slight vibration at idle, which may be bothersome for those who spend a lot of time trolling. If you are sensitive to vibration or need ultra-smooth idling, you might prefer the Yamaha. However, for most users, the DF40A offers great value and performance.
- Lean-burn technology for improved fuel economy
- Compact and lightweight at 107 kg
- Easy maintenance with low oil pressure warning
Pros: Excellent fuel efficiency reduces operating costs; Strong corrosion resistance for saltwater use
Cons: Some users report vibration at idle
3. Mercury 40 HP FourStroke EFI: Best Value
The Mercury 40 HP FourStroke EFI offers a compelling balance of performance and affordability. In our comparison, it provides strong acceleration thanks to the Command Thrust gearcase, and the EFI system ensures easy starting. Owner feedback indicates it is a reliable workhorse for fishing boats and small runabouts.
However, some owners note that the engine is slightly louder than top-tier competitors like Yamaha or Suzuki. If noise levels are a critical factor for you, especially in quiet fishing environments, you may want to test it first. But for budget-minded buyers, this is an excellent value pick.
- Command Thrust gearcase for better acceleration
- Easy-to-use tiller handle option available
- Meets California Air Resources Board 3-star emissions rating
Pros: Competitive pricing for the features offered; Good power-to-weight ratio
Cons: Not as refined as premium brands in terms of noise
4. Honda BF40D: Quietest
The Honda BF40D is renowned for its whisper-quiet operation, making it a favorite among anglers who value stealth. Based on spec sheets and owner feedback, the BLAST system provides a noticeable boost in hole shot. The engine is built to last with robust corrosion protection.
On the downside, the BF40D is heavier and more expensive than many competitors. If weight is a concern for your transom or you are on a tight budget, this may not be the best fit. But if quietness and durability are your top priorities, the Honda excels.
- Honda's innovative BLAST system for quick acceleration
- Very low noise and vibration levels
- Extended corrosion protection for marine environments
Pros: Exceptionally quiet operation; Long-lasting build quality
Cons: Higher price and heavier than some rivals
5. Tohatsu MFS40A EPTL: Lightweight
The Tohatsu MFS40A EPTL stands out for its light weight, making it ideal for smaller boats or users who frequently move their motor. Our research shows it offers solid performance and good fuel efficiency. Owner feedback is generally positive for its reliability and ease of maintenance.
However, some owners note that the build quality is not as premium as Yamaha or Honda, and the engine can be slightly rougher at idle. If you prioritize weight savings above all else and are willing to accept a trade-off in refinement, this is a strong contender. But if you want a more polished experience, look elsewhere.
- Weighs only 99 kg, one of the lightest in its class
- Digital CD ignition for reliable starts
- Tiller handle with power tilt and trim
Pros: Very easy to transport and mount; Good fuel economy for a 40hp
Cons: Less refined than premium brands
6. Evinrude E-TEC 40 HP: Two-Stroke Power
The Evinrude E-TEC 40 HP offers the classic two-stroke feel with modern direct injection technology. It delivers strong torque and quick planing, which is appreciated by skiers and those who need immediate power. Owner feedback often praises its simplicity and low maintenance.
However, this engine is louder and consumes more fuel than comparable 4-strokes. Additionally, Evinrude’s market presence has declined, making parts and service harder to find in some areas. If you prioritize raw power and don’t mind the noise, it could work. But for most buyers, a modern 4-stroke is a better choice.
- Direct injection for cleaner emissions and better fuel economy than traditional 2-strokes
- High torque for quick planing
- No oil mixing required thanks to automatic oil injection
Pros: Excellent acceleration and power-to-weight ratio; Simple maintenance with fewer parts
Cons: Louder and less fuel-efficient than 4-strokes; Parts and service support diminishing
7. Parsun 40 HP Outboard Motor: Budget Friendly
The Parsun 40 HP is a budget-friendly option for those who need a functional outboard without a high price tag. It gets the job done for basic boating needs. Owner feedback indicates it can be a decent entry-level motor for calm waters.
However, this motor is carbureted and two-stroke, resulting in more noise, smoke, and fuel consumption. Reliability and durability are not on par with established brands. If you plan to use the motor frequently or in demanding conditions, we recommend investing in a higher-quality engine. This is best for occasional, low-stress use.
- Lowest price point among 40hp outboards
- Electric start with manual recoil backup
- Tiller handle with forward/neutral/reverse
Pros: Very affordable initial cost; Simple carbureted design easy to work on
Cons: Noisy and smoky operation; Less reliable and shorter lifespan than major brands
Frequently Asked Questions
What is the difference between a 2-stroke and 4-stroke 40hp outboard?
Two-stroke outboards are generally lighter, simpler, and provide quicker acceleration, but they are louder, smoke more, and consume more fuel. Four-stroke outboards are quieter, cleaner, more fuel-efficient, and have better low-end torque, but they are heavier and more complex. For most recreational boaters, a 4-stroke is the preferred choice today.
Can I use a 40hp outboard in saltwater?
Yes, but you need to ensure the motor is equipped with corrosion-resistant materials. Many 40hp outboards, like the Suzuki DF40A and Honda BF40D, are designed for saltwater use with special coatings and anodes. After each saltwater use, flushing the engine with fresh water is essential to prolong its life.
How much does a 40hp outboard motor weigh?
Weights vary by model and configuration. Typically, a 40hp four-stroke outboard weighs between 99 kg (Tohatsu MFS40A) and 115 kg. Two-stroke models are generally lighter, around 80-90 kg. Always check the manufacturer’s specifications to ensure your boat’s transom can handle the weight.
What shaft length do I need for my boat?
The shaft length depends on the height of your boat’s transom. A 20-inch shaft is standard for most small boats, while a 25-inch shaft is needed for boats with higher transoms or for offshore use. Measure your transom height and consult your boat’s manual to determine the correct shaft length.
Do I need to break in a new 40hp outboard?
Yes, most manufacturers recommend a break-in period for new outboard motors. This typically involves running the engine at varying speeds (avoiding prolonged full throttle) for the first 10 hours. Always follow the specific break-in procedure outlined in the owner’s manual to ensure optimal performance and longevity.
Our Verdict
After thorough research, the Yamaha F40LB emerges as our top pick for its smooth performance, reliability, and excellent fuel efficiency. The Suzuki DF40A is a close runner-up, offering great fuel economy and corrosion resistance at a slightly lower price. Both are outstanding choices for most boaters.
Last reviewed and spec-checked: June 10, 2024. We re-check our picks and listings periodically.
