*mynauticexpo

N4.85

Product catalog summary

Specifications
The N4.85 propulsion engine delivers a power output of 62.5 kW (85 hp) at the crankshaft with a displacement of 3.053 liters. It features a 4-cylinder inline configuration with 4 valves per cylinder and operates on a 4-stroke diesel cycle. The engine has a bore and stroke of 94 x 110 mm and a compression ratio of 20:1. It achieves a rated speed of 2800 rpm and an idle speed of 875 rpm, with peak torque of 253 Nm at 1800 rpm. The dry weight with TM345A is 356 kg. The engine is based on a Kubota model and includes a mechanical direct injection fuel system and turbocharged air intake.

Technical Description
The engine block consists of 4 cylinders in line with a gear-driven valve train and a water-cooled exhaust manifold. The fuel system includes a mechanical governor, cam-driven in-line injection pump, fuel feed pump, and a fuel filter with a hand primer. The lubrication system features a replaceable full-flow oil filter, oil dipstick, and oil drain pump. The cooling system is closed with a heat exchanger and includes 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, along with an instrumentation panel.

Optional Equipment & Accessories
Options include keel cooling adaptation, complete marine propulsion systems, throttle and shift controls, additional instrumentation, engine mounting adaptation, two-pole electrical system, water boiler systems, SOLAS approved version, complete fuel systems, stuffing box connections, complete exhaust systems, and trolling valve.

Rating
The engine is rated for up to 3000 annual operating hours with a load factor up to 40%. Full power can be used for no more than 1 hour out of each 12 hours of operation, with the remaining time at or below cruising speed.

Transmissions
Compatible transmission models include TM345A, TMC260, TTMC5A, and ZF25A. Contact local dealers for more details and availability.

Performance Curves
The document includes performance curves for power at the crankshaft, torque at the crankshaft, and fuel consumption at calculated propeller load.

Contact Information
Nanni Industries S.A.S. France and Nanni Trading S.R.L Italy provide contact details for further inquiries.

Catalog excerpts

Propulsion engine Engine base Fuel system Mechanical direct injection 4 cylinders in line 4 valves per cylinder Operation type Turbocharged Closed cooling with heat exchanger 4 stroke Diesel Mounting angle Bore & Stroke Compression ratio Rated speed 7° Front up 7° Front down 12 Volt 100 Amp Idle speed Peak torque Peak torque speed Find a Nanni dealer near you on

Open the catalog to page 1

N4.85 62.5 kW [85 hp] @ 2800 rpm TECHNICAL DESCRIPTION Engine block s 4 cylinders in line s 4 valves per cylinder 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 s Fuel filter with hand primer 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...

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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