background image

2

ENGINE SPECIFICATIONS

N3.21

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

INJECTION SYSTEM

N3.21

Injection

Indirect (E-TVCS)

Injection order

1-2-3

Injection pump

BOSCH MD Mini type

Injection pressure (bar)

140

LUBRICATION

N3.21

Oil type (temperate climat)

API CF-SAE 15W40  

Oil pressure at idle speed (bar)

1

Oil pressure at max speed (bar)

2 - 4.5 

Engine oil capacity (litre)

3

COOLANT

N3.21

Coolant (litres) (50% water - 50% antifreeze)

4

ELECTRICAL

N3.21

Battery capacity mini (Ah)

35-50

Alternator

12V / 70A

CONNECTIONS

N3.21

Exhaust (mm)

40

Fuel (suction and return) (mm)

8

Seawater (mm)

20

* At engine fl ywheel, according to ISO 8665-1.

Certain specifi cations may vary according to your order

Technical characteristics

Summary of Contents for N3.21

Page 1: ...Instruction manual Marine Diesel engine N3 21 13122011 D MU_N3 21_970313240_ENG...

Page 2: ...JECTION SYSTEM N3 21 Injection Indirect E TVCS Injection order 1 2 3 Injection pump BOSCH MD Mini type Injection pressure bar 140 LUBRICATION N3 21 Oil type temperate climat API CF SAE 15W40 Oil press...

Page 3: ...Oil gauge 12 Oil filter 13 Heat exchanger 14 Coolant filler port 15 Sea water pump 16 Exchanger drain plug 17 Coolant pump 18 Flexible suspensions 19 Gearbox 20 Hoisting rings 21 Anode Non binding pho...

Page 4: ...g the engine oil I Warning Hot oil can burn Avoid any contact with the skin Observe the environment protection rules A Oil drain port The oil is removed using a drain pump preferably engine slightly w...

Page 5: ...lter 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 d...

Page 6: ...placed 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 I Warning Close the s...

Page 7: ...uld 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 compri...

Page 8: ...wan 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 The anti siphon valve must...

Page 9: ...nk 2 Prefilter 3 Fuel feed pipe 8 mm 4 Electrical pump option 5 Engine fuel pump 6 Return fuel pipe 8 mm Electrical installation An incorrect or faulty electrical installation can cause leakage curren...

Page 10: ...k 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 Ignitio...

Page 11: ...30 20 5 35 15 25 STOP ON STOP START RPM x 100 10 0 40 30 20 5 35 15 25 C 40 60 80 100 120 F 105 180 220 250 STOP ON STOP START RPM x 100 10 0 40 30 20 5 35 15 25 bar 0 1 2 3 4 5 0 20 40 60 80 psi C 40...

Page 12: ...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 t...

Reviews: