Motorsaazan gas genset engine with 4 cylinders and 3.99 L displacement. Specifications per supplied catalog.

Printed model code	MN440A-45GN
Fuel type	Natural gas
Fuel consumption basis	At 0.25 psi; load percentages vs standby power (FA datasheet)
Number of cylinders	4
Engine displacement	3.99 L
Engine displacement	244 in3
Bore	100 mm
Bore	3.935 inch
Stroke	127 mm
Compression ratio	9.5:1
Coolant capacity (incl. radiator)	16 L
Dry weight	424 kg
Wet weight	447 kg
Length	1000 mm
Width	690 mm
Height	1120 mm
Drawing dimensions	Radiator height 1060 mm; axis height 301.3 mm
Fan diameter	20 inch
Cylinder arrangement	Vertical, inline
Air intake system	Naturally aspirated
Rotation direction	Clockwise viewed from the front of the engine
Cooling	Water-cooled with radiator and hoses
Engine cycle	Four-stroke
Firing order	1-3-4-2
Air filter	Dry dual-stage air filter fitted
Fuel pump	Single-diaphragm gas/air mixer / carburetor
Fuel filter	Gas filter and gas shut-off valve
Governor	Electronic with ECU control
Oil sump	Cast iron with oil drain and dipstick
Lubrication	Full-flow spin-on oil filter
Water pump drive	Belt-driven
Fan	Belt-driven; radiator and hoses fitted
Engine electrics	12 V
Electrical equipment	12 V starter; 12 V 55 A DC alternator; oil-pressure switch; ECU and 12 V 4 A control valve
Flywheel & housing	SAE3 cast housing; high-inertia flywheel SAE J620 size 10 / 11½
Mountings	Front mount
Optional equipment	Water-temp gauge; oil-pressure gauge and sensor; flywheel and coupling for two-bearing alternator; rear mount

Gas genset engines