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Nanni Industries
Feuillet N4.50 ENG

Feuillet N4.50 ENG

Product catalog summary

Specifications
The N4.50 propulsion engine delivers a power output of 36.8 kW (50 hp) at 2800 rpm. It features a 2.197-liter displacement with a 4-cylinder inline configuration and operates on a 4-stroke diesel cycle. The engine has a bore and stroke of 87 x 92.4 mm and a compression ratio of 22:1. It achieves peak torque of 147 Nm at 1800 rpm. The dry weight varies depending on the configuration: 230 kg with TMC60 and 261 kg with Sail Drive SP60. The engine is based on a Kubota platform and uses a mechanical indirect injection fuel system with natural air intake and closed cooling with a heat exchanger. It complies with EPA marine Tier 3, RCD 94/25/EC, and BSO 2 emission standards.

Technical Description
The engine block includes a gear-driven valve train and a water-cooled exhaust manifold. The fuel system features a mechanical governor, cam-driven in-line injection pump, and a fuel feed pump with a hand primer. The lubrication system includes a replaceable full-flow oil filter and an oil drain pump. The cooling system is closed with a gear-driven self-priming raw water pump and a coolant circulating pump. The electrical system operates at 12V with a 100A alternator and includes an electric starter motor and stop function. Instrumentation includes a start/stop panel, tachometer, coolant temperature, and oil pressure indicators with alarms.

Optional Equipment & Accessories
Options include keel cooling adaptation, complete marine propulsion systems, throttle and shift controls, additional instrumentation, and a SOLAS-approved version. Various transmission models are available, including shaft line and sail drive options.

Performance Curves
The performance curves illustrate power at the crankshaft, torque, and fuel consumption across different RPMs, highlighting efficiency and operational capabilities.

Rating
The engine is rated for up to 3000 annual operating hours with a load factor up to 40%. Full power operation is limited to 1 hour out of every 12 hours, with the remaining time at or below cruising speed.

Catalog excerpts

Propulsion engine Engine base Fuel system Mechanical indirect injection Operation type Bore & Stroke Compression ratio Natural Closed cooling with heat exchanger Mounting angle Rated speed Idle speed Peak torque Emission compliance Peak torque speed Dry weight with TMC60 with Sail Drive SP60 Find a Nanni dealer near you on 15° Front up 15° Front down 12 Volt 100 Amp M4 EPA marine Tier 3 RCD 94/25/EC BSO 2

Open the catalog to page 1

N4.50 36.8 kW [50 hp] @ 2800 rpm TECHNICAL DESCRIPTION Engine block s 4 cylinders in line s Gear-driven valve train s Watercooled exhaust manifold Fuel system s Mechanical governor s Cam driven in-line injection pump s Fuel feed pump with hand primer s Fuel filter Lubrication system s Replaceable full-flow oil filter s Oil dipstick s Oil drain pump Cooling system s Closed cooling with heat exchanger s Gear driven self-priming raw water pump s Coolant circulating pump s Water cooled exhaust elbow Electrical system & Instrumentation s 12V Electrical system s 12V 100A alternator s Electric starter...

Open the catalog to page 2

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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