Inboard boat engines are a popular choice for many boating enthusiasts due to their reliability, performance, and efficient power delivery. These engines are mounted inside the hull of the boat, typically in the center, providing a low center of gravity that enhances stability and handling. Inboard engines are connected to a driveshaft that runs through the bottom of the hull, turning a propeller located at the stern of the boat. This design allows for smoother and more efficient propulsion, making inboard engines ideal for various marine applications, from leisurely cruising to high-speed water sports.
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1-2 weeks delivery time The Nanni N4.38 Saildrive SD12 engine provides the same 37.5 hp as other variants but without a gearbox, offering flexibility for various marine propulsion systems. It has a 1,498 l displacement and a 23:1 compression ratio, reaching a rated speed of 3000 rpm. With mechanical indirect injection, natural air intake, and a closed cooling system, it is designed for marine use. The engine has a dry weight of 153 kg with the TMC60 gearbox and 184 kg with the Sail Drive SP60.
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$ 22.830,73
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1-2 weeks delivery time The Nanni N4.40 Bobtail engine delivers 40 hp with a 1,999 l displacement and a 22.8:1 compression ratio. Designed for marine applications, it operates at a rated speed of 2800 rpm with a peak torque of 110 Nm at 2000 rpm. This 4-cylinder, 4-stroke diesel engine includes mechanical indirect injection and natural air intake. It comes with a closed cooling system and a maximum mounting angle of 15°. The engine weighs 227 kg with the TMC35A gearbox and 259 kg with the Sail Drive SP60.
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$ 17.331,20
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1-2 weeks delivery time The Nanni N4.40 engine with the TMC60 M gearbox and a reduction ratio of 2.00 offers 40 hp at 2800 rpm, with a 1,999 l displacement and a 22.8:1 compression ratio. It is equipped with a 4-cylinder, 4-stroke diesel configuration, mechanical indirect injection, and natural air intake. The engine also features a closed cooling system, making it ideal for marine use. The dry weight is 227 kg with the TMC35A gearbox and 259 kg with the Sail Drive SP60.
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$ 18.903,48
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1-2 weeks delivery time The Nanni N4.40 engine with the TMC60 M gearbox and a reduction ratio of 2.50 provides 40 hp and operates at 2800 rpm. Its 1,999 l displacement and 22.8:1 compression ratio ensure efficient power. With mechanical indirect injection and natural air intake, this engine features a closed cooling system designed for marine environments. It has a dry weight of 227 kg with the TMC35A gearbox and 259 kg with the Sail Drive SP60.
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$ 18.903,48
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1-2 weeks delivery time The Nanni N4.40 engine with the TMC60A gearbox and a reduction ratio of 2.50 ensures efficient power delivery at 40 hp and 2800 rpm. The engine’s 1,999 l displacement and 22.8:1 compression ratio, combined with mechanical indirect injection and natural air intake, make it ideal for marine use. It includes a closed cooling system and offers a maximum mounting angle of 15°. The dry weight is 227 kg with the TMC35A gearbox and 259 kg with the Sail Drive SP60.
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$ 18.879,02
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1-2 weeks delivery time The Nanni N4.40 engine with the TMC60A gearbox and a reduction ratio of 2.00 offers reliable performance at 40 hp and 2800 rpm. With a 1,999 l displacement and a 22.8:1 compression ratio, this 4-cylinder engine includes mechanical indirect injection and natural air intake. The engine is equipped with a closed cooling system, designed to meet marine needs. It weighs 227 kg with the TMC35A gearbox and 259 kg with the Sail Drive SP60.
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$ 18.937,70
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1-2 weeks delivery time The N4.50 Bobtail (MEC) is a marine diesel engine with a reliable performance, offering 35.4 kW (47.5 hp) at the crankshaft. With a 4-cylinder in-line configuration and a displacement of 2,197 cc, it operates at a rated speed of 2800 rpm. This engine features a closed cooling system, mechanical indirect injection, and complies with EPA marine Tier 3 and RCD 2013/53/EU emissions standards. Weighing 229 kg (504 lbs), it provides a peak torque of 146 Nm at 1800 rpm.
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$ 18.883,40
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1-2 weeks delivery time The Nanni N4.50 with the ZF25A gearbox and a 1.93 reduction ratio offers high performance for marine use. With the same power output of 35.4 kW (47.5 hp), this engine has a 4-cylinder in-line configuration, 2,197 cc displacement, and a rated speed of 2800 rpm. It features a mechanical indirect injection fuel system, closed cooling with heat exchanger, and meets EPA marine Tier 3 and RCD 2013/53/EU emissions standards. The engine weighs 229 kg (504 lbs) and delivers peak torque of 146 Nm at 1800 rpm.
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$ 23.070,29
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1-2 weeks delivery time The Nanni N4.50 engine paired with the ZF25A gearbox and a 2.71 reduction ratio provides enhanced power and torque for demanding marine environments. With a 4-cylinder in-line design and 2,197 cc displacement, it produces 35.4 kW (47.5 hp) and runs at a rated speed of 2800 rpm. This engine features mechanical indirect injection, natural air intake, and closed cooling. It complies with EPA marine Tier 3 and RCD 2013/53/EU emissions standards and has a dry weight of 229 kg (504 lbs), delivering peak torque of 146 Nm at 1800 rpm.
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$ 23.070,29
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1-2 weeks delivery time The Nanni N4.50 with the TMC345A gearbox and a 2.00 reduction ratio offers an optimal combination of power and efficiency for marine operations. The engine produces 35.4 kW (47.5 hp) with a displacement of 2,197 cc and a rated speed of 2800 rpm. It includes mechanical indirect injection, natural air intake, and a closed cooling system. Complying with EPA marine Tier 3 and RCD 2013/53/EU emissions standards, it weighs 229 kg (504 lbs) and provides peak torque of 146 Nm at 1800 rpm.
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$ 22.817,29
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1-2 weeks delivery time The Nanni N4.50, with the TMC345A gearbox and a 2.47 reduction ratio, offers powerful performance for marine applications. The engine delivers 35.4 kW (47.5 hp) and a displacement of 2,197 cc, operating at 2800 rpm. Equipped with mechanical indirect injection, a natural air intake system, and closed cooling, it complies with EPA marine Tier 3 and RCD 2013/53/EU emissions standards. Weighing 229 kg (504 lbs), it achieves a peak torque of 146 Nm at 1800 rpm.
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$ 22.817,29
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1-2 weeks delivery time The Nanni N4.50 with the TMC345H gearbox and a 2.00 reduction ratio is engineered for high efficiency and reliable performance in marine conditions. Offering 35.4 kW (47.5 hp) at the crankshaft and a 2,197 cc displacement, it runs at a rated speed of 2800 rpm. The engine features mechanical indirect injection, natural air intake, and a closed cooling system. It adheres to EPA marine Tier 3 and RCD 2013/53/EU emissions standards, with a dry weight of 229 kg (504 lbs) and a peak torque of 146 Nm at 1800 rpm.
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$ 22.764,97
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1-2 weeks delivery time The Nanni N4.50, coupled with the TMC345H gearbox and a 2.47 reduction ratio, delivers robust power and torque for demanding marine applications. This engine generates 35.4 kW (47.5 hp) with a displacement of 2,197 cc and operates at a rated speed of 2800 rpm. It features mechanical indirect injection, a natural air intake system, and closed cooling. The engine complies with EPA marine Tier 3 and RCD 2013/53/EU emissions standards, weighs 229 kg (504 lbs), and provides a peak torque of 146 Nm at 1800 rpm.
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$ 22.747,62
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1-2 weeks delivery time The N4.50 Bobtail (HYD) engine is a highly efficient 4-cylinder, 4-stroke diesel engine designed for marine use. With a power output of 35.4 kW (47.5 hp), it features a mechanical indirect injection fuel system, natural air intake, and a closed cooling system. Its specifications include a 2,197 cc displacement, peak torque of 146 Nm at 1,800 rpm, and a rated speed of 2,800 rpm. This engine is well-suited for applications that require no gearbox, offering a dry weight of 229 kg (504 lbs).
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$ 19.074,96
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1-2 weeks delivery time The Nanni N4.50 Saildrive SD12 engine provides reliable performance with a 4-cylinder, 4-stroke diesel setup, delivering 35.4 kW (47.5 hp). It comes with a 2,197 cc displacement, a mechanical indirect injection fuel system, and a turbocharged air intake. With a peak torque of 146 Nm at 1,800 rpm and a rated speed of 2,800 rpm, this engine offers robust marine performance. It also features a closed cooling system and is compliant with various emission standards, with a dry weight of 229 kg (504 lbs) and a reduction ratio of 2.23.
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$ 23.590,58
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1-2 weeks delivery time The Nanni N4.65 Bobtail engine is a powerful and reliable option for marine applications, featuring a 4-cylinder, 4-stroke diesel engine with 43.4 kW (59 hp) output. With a displacement of 2,434 cc, turbocharged air intake, and a closed cooling system, it offers a peak torque of 168 Nm at 1,800 rpm and a rated speed of 2,700 rpm. This engine does not include a gearbox, making it ideal for applications requiring more flexibility. The engine's dry weight is 248 kg (546 lbs), and it meets various emission standards.
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$ 21.178,48
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1-2 weeks delivery time The Nanni N4.65 with the ZF25M gearbox and a reduction ratio of 1.88 provides enhanced performance and torque for marine applications. This 4-cylinder, 4-stroke diesel engine delivers 43.4 kW (59 hp) with a displacement of 2,434 cc. It has a turbocharged air intake, closed cooling system, and a peak torque of 168 Nm at 1,800 rpm, with a rated speed of 2,700 rpm. The engine features a ZF25M gearbox, making it suitable for applications that require more efficient torque distribution. With a dry weight of 248 kg (546 lbs), it complies with various emission standards.
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$ 25.790,55
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1-2 weeks delivery time The Nanni N4.65 with the ZF25H gearbox and a reduction ratio of 2.80 is a reliable 4-stroke diesel engine designed for marine applications. It features a 59 hp power output, a 2.434-liter displacement, and a turbocharged air intake system. Its robust mechanical indirect injection fuel system ensures efficiency, while the engine's peak torque of 168 Nm at 1800 rpm provides reliable performance in various operating conditions.
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$ 26.531,85
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1-2 weeks delivery time The Nanni N4.65 engine, paired with the ZF25A gearbox and a reduction ratio of 1.93, offers a balanced solution for maritime needs. It shares the same 59 hp power and 2.434-liter displacement as the other variants, and features mechanical indirect injection, turbocharging, and closed-loop cooling. This engine maintains high reliability and complies with IMO Annex VI, RCD, and BSO2 emission standards.
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$ 26.809,68
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1-2 weeks delivery time The Nanni N4.65 with ZF25A gearbox and a reduction ratio of 2.70 delivers dependable power for marine vessels. It maintains the same essential specifications as other N4.65 variants, with a 59 hp power output and a 2.434-liter engine displacement. Its closed cooling system with a heat exchanger and turbocharged intake system ensures long-lasting durability and efficiency for demanding maritime applications.
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$ 26.809,68
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What are the key characteristics of an inboard boat engines compared to other boat engines?
Inboard marine engines are designed for durability and efficiency in marine use, offering a lower center of gravity and improved weight distribution compared to outboard and sterndrive engines. This engines are built on GM production lines strictly for marine use, ensuring reliability and longevity in harsh marine environments.
What factors influence the choice between a diesel and gasoline inboard engine?
The choice between a diesel and gasoline inboard engine depends on factors like fuel efficiency, durability, and maintenance costs. Diesel inboard engines are designed for long-term performance and reliability, offering better fuel economy and a longer lifespan, making them ideal for extended cruising and commercial marine applications. Gasoline inboard motors, on the other hand, provide higher throttle response and lower initial costs, making them a popular choice for recreational boating where speed and affordability matter.
What are the environmental benefits of modern inboard marine engines compared to older models?
Modern inboard marine engines are designed with advanced fuel injection systems and efficient cylinder head configurations, significantly reducing emissions compared to older models. Many replacement engines and remanufactured engine options offer improved fuel efficiency and lower engine noise, contributing to a cleaner marine environment while providing peace of mind for boaters. With advancements in engine package design and drop-in solutions, marine power engines ensure optimal performance while minimizing their environmental footprint in various engine applications.