Instruction manual Marine Diesel engine N3.21
Contents
1. AL gt 4 _ vDo vDo Battery charge This warning light comes at ignition If this warning light comes on while the engine is running this means there is a charging fault in the alternator oi Coolant temperature warning light This light comes on and an alarm goes off in the event of overheating in the cooling system Engine oil pressure warning light This light comes on when the pressure in the lubrication system is too low Pre heating This light is on when the spark plugs are pre heating the combustion chambers if your engine has these Water in the diesel filter warning light optional This light comes on when there is too much water in the diesel filter x Ignition This light indicates that the ignition is on Operation of an engine equipped with an Eco4 A4 B4 or C4 panel To start the engine 1 Put the throttle in the neutral position 2 Put the key into the ON STOP ignition 3 Turn the key a quarter turn to the right All the warning lights will come on and it will make a sound signal This stage allows you to check that these elements are working properly After a few moments only the oil alert and battery charge lights will remain on 4 Press the START button at halfway to start preheating Hold the button for 5 to 15 seconds depending on ambient temperature in order to let the engine preheat Press fully to start the engine Warning Never press the2. B Clamps Warning Be sure no impurities get into the engine Remove the clamp from the hose and remove the filter Remove the spring inside the filter If necessary clean the filter by washing it with soapy water Then rinse the filter with clear water Press the filter to remove any water and to dry it NANNI DIESEL has designed a cleaning kit which is suited to certain models of air filters Use of this kit is recommended on our engines to perform effective cleaning and ensure good engine breathing Bleeding the fuel system The fuel system is self priming but it needs to be manually bled when the filter is changed after it runs out of fuel or after work on the system if it has run dry or it has been emptied Open the fuel valve Place container beneath the bleed screw A and loosen it Activate repeatedly the priming pump by pressing the lever B until fuel with no air bubbles flows through the bleed screw If the fuel is not flowing after few minutes rotate the crankshaft a quarter turn Tighten the bleed screw A A Warning Avoid emptying all the fuel in the filter during bleeding Replacing the fuel filter cartridge This filter treats the water and impurities contained in the fuel before it flows into the injection system Cut off fuel intake at the tank Place a container below the filter and then dispose of the used filter cartridge C Refit the new filter by attaching it securely to the eng
3. Coolant filler port 4 Air filter 15 Sea water pump 5 Injection pump 16 Exchanger drain plug 6 Acceleration control 17 Coolant pump 7 Fuel filter 18 Flexible suspensions 8 Water injection exhaust elbow 19 Gearbox 9 Oil filler port 20 Hoisting rings 10 Oil drain port 21 Anode 11 Oil gauge 3 Inspection and adjustment of the levels Cil level A Warning The oil checks must always be performed with the engine stopped and cold Be careful these fluids are flammable Do not smoke in the vicinity of these fluids and do not allow for any sparks or flame in the vicinity A Oil gauge B Oil filler port Engine casing oil remove the gauge wipe off the gauge and reinstall it in the gauge tube Pull out the gauge again and check the oil level It should be located between the min and max positions on the gauge If necessary top up the oil level open the air filler port pour the recommended oil see technical appendices to reach the max level indicated on the gauge without exceeding the max level Close the oil filler port Draining the engine oil Warning Hot oil can burn Avoid any contact with the skin Observe the environment protection rules A Oil arain port The oil is removed using a drain pump preferably engine slightly warm Fully pump out all the oil Fill with new oil Check the oil level using the gauge Do not exceed the maximum level Air filter A Air filter
4. the engine A Seawater pump B Impeller C Gasket Close the seawater intake valve Close the seawater pump cover Using a channel lock pliers remove the worn Impeller If the rotor shows any signs of cracks or defects it should be replaced Clean the parts preserved Fit a new rotor by applying a clockwise rotary movement Install the seawater pump cover using a new seal Open the seawater intake valve Start up the engine and check for any leaks in the circuit Coolant level A Warning When filling the cooling system the coolant level must be checked after 10 minutes of use since the system purges itself automatically Top up if necessary A Coolant plug B Expansion tank Turn the filler plug up to its first stop to allow the pressure in the system to escape before removing the plug Inspect the fluid level The level should be between the lower edge of the filler neck and the level pin if equipped respectively representing the minimum and maximum level in the expansion chamber Top up if necessary using a fluid comprising 50 water and 50 antifreeze Degassing procedure Make sure that the drain plugs block heat exchanger are closed Open the vent plugs C and D heat exchanger clamp by pass Open the filler plug A and fill with the recommended liquid Close the vent plug when the liquid escape from it Finish the filling of the exchanger Close the filler
5. Instruction manual Marine Diesel engine N3 21 diesel energy in blue 13122011 D MU N3 21 970313240 ENG Technical characteristics Ds Injection Cycle 4 strokes Diesel Max power kW hp 15 4 21 Number of cylinders Arrangement 3 in line Displacement cm3 719 Fuel timing before TDC 20 to 22 Compression rate 23 1 Aspiration Atmospheric Bore x stroke mm 67 x 68 Maximum rpm speed at full throttle rpm 3600 Idle rpm speed rpm 1050 No load rpm speed rpm 3820 Recommended cruising speed rpm 2880 3240 Weight without gearbox kg 97 Indirect E TVCS Injection order 1 2 3 Injection pump BOSCH MD Mini type Injection pressure bar Oil type temperate climat 140 API CF SAE 15W40 Oil pressure at idle speed bar 1 Oil pressure at max speed bar 2 4 5 Engine oil capacity litre Coolant litres 50 water 50 antifreeze Battery capacity mini Ah 35 50 Alternator 12V 70A Exhaust mm 40 Fuel suction and return mm 8 Seawater mm 20 At engine flywheel according to ISO 8665 1 Certain specifications may vary according to your order M Main parts of the engine CX Non binding photographs The coupled equipment and accessories can vary according to your level of equipment 1 Alternator 12 Oil filter 2 Alternator belt 13 Heat exchanger 3 Starter 14
6. START button when the engine is running Stopping the engine Turn the key counter clockwise The engine switches off and all the warning lights go out The operation of the and panels is explained in the user manual reference 970313180 that is also delivered with the engine 4 Instrument panel E ON GHiEWSD SIT wl 20 14 15 www 25 4 gt Bg w 35 405 514 ON STOP START ON STOP START 11 M SM5 ON STOP 4 mum 25 0 START Nanni Industries S A S 150 9001 11 Avenue Mariotte Zone Industrielle BUREAU VERITAS BP 107 33260 La Teste France Certification Tel 33 0 5 56 22 30 60 Fax 33 0 5 56 22 30 79 E mail contact nannidiesel com 2009 Nanni Industries SAS The images text and information contained in this document are based on the product s features at the time of publication Nanni Diesel reserves the right to modify this document without prior notice
7. e anti siphon valve must be installed at the end of the seawater system before injection in the exhaust elbow and must be positioned above the waterline between 0 5 and 2 meters 6 Seawater filter This must always be positioned at least 15cm above the waterline 7 Through hull valve On yachts and boats that do not go above 12 knots the water inlet must be turned towards the end of the boat On motor boats that go over 12 knots the water inlet must be turned forwards Engine room The temperature inside the engine compartment must not exceed 50 with a maximum difference of 20 with the outside temperature Slow boats must have a ventilator fitted Fresh air from the front is circulated from front to back The front air intake is located low down at the front of the engine compartment and the outlet high at the back for optimum air circulation engine air consumption 160 m h The cables and extensions must be securely fastened to the engine and or on the walls of the engine room do not let it dangle in the hold or let it exposed to water or moisture Fuel supply system The fuel tank of the engine must be placed as possible at the same level or slightly higher than the engine The return pipe must be placed under the mini level of the fuel tank The max height between the fuel pump and the mini level of the tank is indicated on the right The standard pump is capable of sucking the fuel to a he
8. ight of 0 5m An electric pump has to be installed beyond this value 1 Tank Prefilter Fuel feed pipe 28 mm Electrical pump option Engine fuel pump Return fuel pipe 28 mm oa kh ND Electrical installation An incorrect or faulty electrical installation can cause leakage currents that can affect the galvanic protection of the engine and damage the engine subsequently The installer must ensure to take all necessary precautions to protect the engine against corrosion Auxiliary 12V output on instruments panel The A4 B4 and C4 panels are equipped with an auxiliary output of 12V The interfaces linking the panels to the engine are fitted with a fuse Installation inspection Max height m Standard pump 0 5 Electrical pump 1 8 Instrument panel The instrument panel provides you with important information on the engine when it is in operation Regularly check this information when the engine is running 2 ranges of instruments panels are available Only the position and or appearance of the instruments and or the icons vary depending on the type of panel All panels are not composed of all these elements 1 Revolution counter 2 Hour meter Voltmeter 3 Engine oil pressure M 20 B 4 cce y 15 RPM x 100 25 p a ES 2 80 100 1 510 ol 30 vUur 5 35 0 0 4 5 40 180 220 7120 80 H bar psi
9. ine Turn up the hoses on the filter by squeezing the clamps Loosen the bleed screw to bleed the air open the fuel valve again and bleed the system Start the engine and check that the assembly is properly sealed Warning Used filters must be disposed of in containers designed for this purpose Zinc anode A Warning Perform this operation with the engine stopped and cold A zinc anode forms part of the exhaust elbow It serves as an anticorrosion anode The anode must be replaced when more than 5096 of it has been consumed Diameter 10 mm Length 16 mm Inspection and adjustment of the levels Inspection and adjustment of the levels Alternator belt A Warning Perform this operation with the engine stopped A Alternator B Alternator belt Regularly check the tensions of the alternator belt Tension the belt between the pulleys in accordance with the tension or deflection given in the technical characteristics using a DENSO meter Inspect drive belt Visually check the belt for excessive wear frayed cords etc If any defect has been found replace the drive belt If the belt has chunks missing from the ribs it should be replaced Check that it fits properly in the ribbed grooves Check with your hand to confirm that the belt has not slipped out of the groove on the bottom of the pulley Seawater pump A Warning Close the seawater intake valve as there is a risk of water penetrating into
10. plug Fill half the expansion chamber by the filler plug B Inspection and adjustment of the levels Installation Inspection A Warning Your engine must be installed by an authorised shipyard or a qualified Nanni Industries representative in accordance with the on board assembly instructions However you can check some important points on the installation of the engine However your installation can be different than the one that is indicated in this chapter waterline 1 Engine frame The engine frame must be solid and able to absorb all the dynamic stress as well as the weight of the engine It must be connected to the hull by a big a surface area as possible The engine must not be at an angle of more than 15 when the boat is stopped 2 Propeller shaft The choice of propulsion system must be made according to the restrictions arising from the engine and the boat 3 Water exhaust box waterlock The waterlock must be positioned as close to the engine and as low as possible Its volume must be of 5 litres minimum The maximum allowable back pressure is 10 5 kPa 1 523 PSI 4 Hull outlet The hull outlet must be located 15cm above the water line The tube between the exhaust box and the hull outlet must form a swan neck shape to avoid any water getting into the exhaust system through the hull outlet 5 Anti siphon valve This is obligatory on boats whose engine is below the waterline Th
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