The marine engine 24 - 78 kW / 32 - 105 hp

These are the characteristics of the 912:

Air-cooled 3-, 4-, 5- and 6-cylinder naturally aspirated in-line engines.
Unit construction system with single cylinder arrangement and maximum parts commonality.
Advanced injection and combustion systems.
Electronic governor (option).
Compact power unit with low weight.
Only a few servicing points.
Tried and tested worldwide: more than 2.7 million engines in operation.

Engine description

Type of cooling: ...

Air-cooled with integrated axial-flow blower.

Crankcase:...

Grey cast iron.

Cylinder head: ...

Aluminium single cylinder heads, protection against seawater corrosion (optional).

Valve arrangement / timing: ...

Overhead valves in the cylinder head, one inlet and one exhaust valve per cylinder,

actuated from gear driven camshaft via tappets, pushrods and rocker arms.

Piston: ...

Three-ring piston: 2 compression rings, 1 oil scraper ring.

Piston cooling: ...

Oil cooled with spray nozzles.

Crankshaft: ...

Crankshaft of nodular iron with integrated counterweights.

Crankshaft and big-end bearings: .

Ready-to-install bi-metal plain bearings.

Camshaft:...

Steel, seated in bi-metal bearing at blower end.

Lubrication system: ...

Forced-feed circulation lubrication with rotary pump which feeds both

lubricating and heating systems.

Engine oil cooler: ...

Integrated aluminium cooler.

Oil cooler thermostat: ...

Oil cooler flow thermostatically controlled on engines with heating system.

Lubricating oil filter: ...

Paper-type microfilter as replaceable cartridge, full flow filter.

Injection pump /governor:...

In-line injection pump with mechanical centrifugal governor.

Injection nozzle:...

Five-hole nozzle.

Fuel filter:...

Replaceable cartridge.

Starter motor: ...

12V, 2.7 kW (standard)

Alternator: ...

Three-phase alternator, 14 V, 55 A (standard)

Heating system:...

Optional connection for cabin heating.

Options: ...

Intake manifold connections, exhaust manifold connections, compressors,

hydraulic pumps, engine mounts rigid and flexible, oil pans, SAE 1/2/3/4 flywheel

housings, three-phase alternators 12 and 24 V, integrated hydraulic oil cooler,

blower controlled by exhaust thermostat, double-walled high-pressure injection

lines, classification acceptance in accordance with the regulations of marine

classification societies.

Technical data
Engine type				F 3L 912				F 4L 912				F 5L 912				F 6L 912
Model				in-line				in-line				in-line				in-line
Number of cylinders				3				4				5				6
Bore/stroke		mm		100/120				100/120				100/120				100/120
Displacement		l		2.827				3.770				4.680				5.616
Power ratings for marine propulsion units
acc. to power category A 1)
at 1500 min-1		kW (HP)		24		-33		32		-44		40		-54		48		-65
at 1800 min-1		kW (HP)		28		-38		38		-52		48		-65		57		-78
at 2150 min-1		kW (HP)		32		-44		44		-60		55		-75		66		-90
acc. to power category B 2)
at 2300 min-1		kW (HP)		38		-52		51		-69		65		-88		78		-106
Power ratings for on-board generating sets
Continuous power 3)
at 1500 min-1		kW (HP)		28		-37		36		-49		46		-63		55		-75
at 1800 min-1		kW (HP)		32		-43		43		-58		55		-75		66		-90
Specific fuel consumption 4)
at 1500 min-1		g /kWh (g/HPh )		213		-157		213		-157		213		-157		213		-157
at 1800 min-1		g /kWh (g/HPh )		218		-160		218		-160		218		-160		218		-160
at 2150 min-1		g /kWh (g/HPh )		227		-167		227		-167		227		-167		227		-167
Weight		kg		270				300				380				410
IMO NOx limit values 5)				fulfilled				fulfilled				fulfilled				fulfilled
Fulfills classification regulations 6) acc. to:			GL +NKK*				GL +NKK				GL +NKK				GL +NKK