40 HP 3-Cylinder EFI Vs 4-Cylinder EFI FourStrokes Vs SeaPro 40HP Outboards
Mercury Marine is one of the most popular brands of boat motors on the market. The company manufactures reliable, robust, and durable marine engines. They offer a wide range of models, all built to high standards and backed by a strong warranty.
Regarding the 40HP outboard segment, the Mercury 40 HP 3-Cylinder EFI Fourstroke engine, 4-Cylinder EFI FourStroke, and 40 HP SeaPro are some of the most popular models. But which one is right for you?
In this blog, we’ll compare these three of Mercury’s famous 40-horsepower outboards. We will look at their features, performance, and other aspects to help you decide which is best for your needs.
Comparison of Mercury 40 HP 3-Cylinder EFI FourStroke vs 4-Cylinder EFI FourStroke vs SeaPro 40 HP
1. Specifications
40 HP 3-Cylinder EFI FourStroke
The Mercury 40 HP 3-Cylinder EFI Fourstroke has a displacement of 747cc and an inline-3 (6-valve, SOHC) configuration. It has a maximum RPM range of 5500-6000 and a gear ratio of 2.00:1. It weighs 204 lbs (93 Kg) and has a tiller or remote steering with standard gearcase options.
4-Cylinder 40 HP EFI FourStroke
The Mercury 40 HP 4-Cylinder FourStroke engine has a displacement of 995cc and an inline-4 (8-valve, SOHC) configuration. It also provides a maximum RPM range of 5500-6000 at full throttle with a gearcase ratio of 2.33:1. It weighs 260 lbs (118 kg) and has CT (Command Thrust) gearcase options.
SeaPro 40 HP
Let’s check about SeaPro. It boasts a 995cc displacement with an inline-4-cylinder configuration. This engine has mechanical throttle & shift controls, a big tiller or remote steering, a 2.33:1 gearcase ratio, and a 20” to 25” shaft length. It weighs around 260 lbs (118 kg).
Mercury 40 ELPT 3 Cylinder FourStroke
2. Features
40 HP 3-Cylinder EFI FourStroke
You get an electronic fuel injection for precise fuel control and improved efficiency with the EFI model of the 40 HP 3-cylinder engine. It is smooth and quiet, and produces plenty of low-end torque for excellent acceleration and power, even on heavy fishing boats. It has a maintenance-free valve train, so you do not need periodic adjustments. It also has a freshwater flushing system for easy engine flushing.
4-Cylinder 40 HP EFI FourStroke
The Mercury 40 HP 4-Cylinder EFI FourStroke has an idle charge battery-management system, which keeps your battery charged when idling for extended periods. Its electronic fuel injection system provides reliable starts & improved fuel efficiency, and a maintenance-free valve train.
SeaPro 40 HP
The Mercury SeaPro 40 HP has a heavy-duty gearcase with a larger-diameter prop shaft, sturdy upper mounts, and stiff bearings for improved durability. An easy-to-access fuel filter, a convenient decal, freshwater flushing, and other features enable quick, smooth maintenance. It also has a commercial-grade engine designed to withstand the rigors of commercial use.
Mercury 40ELHPT & ELPT Command Thrust 4 Cylinder FourStroke
3. Performance
Connect with any Mercury outboard dealers on Vancouver Island, and they will detail how these boat motors outperform their competitors in almost all segments. Mercury marine engines are engineered to offer more power with less engine stress and superior fuel economy, lift heavy vessels on planes more efficiently, and maintain the plane at lower speeds than other outboards in the same category.
40 HP 3-Cylinder EFI FourStroke
The 3-Cylinder 40 HP EFI Fourstroke has a top speed of around 30 mph and can accelerate from 0-20 mph in about 5 seconds. It delivers reliable turnkey starts, excellent use of every drop of fuel, and prompt throttle response.
4-Cylinder 40 HP EFI FourStroke
The high displacement with four-cylinder & single-overhead-cam design of the 40 HP 4-Cylinder EFI FourStroke offers unparallel power and smooth rides. This outboard is excellent for aluminum consoles, rigid inflatable hulls (RIB), aluminum tillers, watersports, soft hull boats, and fish & ski boats.
SeaPro 40 HP
The SeaPro series of engines from Mercury Marine is specifically built for commercial use. The 40 HP SeaPro delivers maximum torque at lower RPM, which means you get more power from the engine with less effort. Its hydrodynamic design with an incredible power-to-weight ratio enables optimum use of every fuel drop. The Mercury DTS (Digital Throttle & Shift) system provides smooth, quiet shifting with supreme throttle response.
Mercury 40 ELPT & ELHPT SeaPro have an Inline 4 Cylinder Configuration
Conclusion
Which outboards for sale in British Columbia are right for you? It relies on the use, requirement, and budget. Every engine has pros and deliverables for specific boats and water conditions. But one thing for sure is that no matter which model you choose, you can be sure you’re getting a high-quality outboard motor from Mercury.
As one of the most reliable and reputed BC boat dealers, we have many options in 40 HP and other horsepower categories. Connect with us today to select the proper boat engine based on your preferences and vessel specifications.
About the Author
Stephan Zilliken
Stephan Zilliken, founder of Alberni Power & Marine and Rods Power Marine, has spent more than half his life shaping the marine industry. What began with a passion for fixing and fine-tuning boats grew into leading one of the country’s most trusted Mercury Marine dealerships. His long partnership with Mercury Marine since the mid-1990s helped establish Alberni Power & Marine as a synonym for quality and performance on Canada’s West Coast. Known for his meticulous attention to detail in powering, repowering, and service, Stephan built his reputation one boat at a time. While he no longer works as a boat mechanic, his expertise and guidance still inspire the team, suppliers, and customers who value his deep knowledge of boating and marine technology.