803931 Mercruiser VENTURI

Table 1
Engine type     S4Q     S4Q2    
Main specifications     Model     Vertical type, Water-cooled, 4-stroke cycle diesel engine    
Number and arrangement of cylinders 4 cylinder in-line    
Combustion type Swirl chamber type    
Valve mechanism Overhead    
Cylinder bore x stroke 88.0 mm x 95.0 mm (3.46 inch x 3.74 inch)    
88.0 mm x 103.0 mm (3.46 inch x 4.06 inch)    
Displacement
2.311 L (0.610 US gal)    
2.505 L (0.700 US gal)    
Compression ratio 22.0 :1    
Fuel used JIS K2204, Diesel oil, or its equivalent (ASTM D975).    
Firing order 1 - 3 - 4 - 2    
Direction of rotation Counterclockwise when viewed from flywheel    
Dimensions Overall length    
707.0 mm (27.83 inch)    
Overall width
493.0 mm (19.40 inch)    
Overall height
633.0 mm (24.92 inch)    
Dry weight Approx.
195.0 kg (429.9 lb)    
Basic engine     Cylinder     Type     Dry (integral with cylinder block)    
Piston ring Number of rings     Compression rings: 2    
Oil ring (w/expander): 1
Valve timing (when warm) Inlet valve     Open     BTDC 30 degrees    
Close ABDC 50 degrees
Exhaust valve Open BBDC 74 degrees    
Close ATDC 30 degrees
Starting system Electric    
Starting aid system Glow plug    
Fuel system     Fuel injection pump     Type     In-line (Bosch A type) or Distribution (VE type)    
Plunger diameter In-line: Diameter
6.50 mm (0.260 inch) Distribution: Diameter
11.0 mm (0.43 inch)    
Fuel feed pump Type     In-line pump: Piston type Distribution pump: Vane Pump type    
Governor Speed control system     Centrifugal type    
Feature All speed    
Fuel injection nozzle Nozzle type     Bosch, Throttle type    
Number of spray holes 1    
Spray hole diameter Diameter
1.0 mm (0.04 inch)    
Spray angle 0 degrees    
Valve opening pressure
13.73 MPa (1991.00 psi)    
Lubrication system     Lubricating method     Forced circulation type (pressure feed by oil pump)    
Engine oil Standard (API service classification)     Class CF or CH-4    
Engine oil capacity Shallow oil pan: approx.
5.50 L (1.45 US gal) in oil pan (Engine total: approx.
6.50 L (1.78 US gal)) Deep oil pan: approx.
7.50 L (1.98 US gal) in oil pan (Engine total: approx.
8.50 L (2.25 US gal))    
Oil pump Type     Trochoid    
Discharge capacity
10.45 L (2.76 US gal) / min or more (at pump rotation of 1000 rpm)    
Relief valve Valve opening pressure    
0.30 to 0.40 MPa (43.51 to 58.01 psi)    
Oil filter Type     Cartridge type paper element    
Cooling system     Cooling method     Water-cooled, forced circulation    
Coolant capacity (engine)
4.00 L (1.06 US gal), approx.    
Water pump Type     Volute type centrifugal pump    
Discharge capacity
70.0 L (18.49 US gal) / min (Pump rotating speed 3000 rpm), total pump head 2.5 x 10-2 MPa    
Thermostat Type     Wax type    
Valve opening temperature
76.5 1.5 °C (169.7 2.7 °F)    
Electrical system     Starter     Manufacturer     Mitsubishi Electronic Corporation    
Type M008T70371    
Pinion meshing type Pinion shift    
Output 12 V - 2.0 kW    
Qty 1    
Ring gear and pinion ratio 10/113    
No-load characteristics Voltage 11 V    
Current 130 A or below
Speed 3600 rpm or more
Load characteristics Voltage 7.7 V    
Current 400 A
Torque
10.59 N m (7.81 lb ft)
Speed 1280 rpm or more
Load characteristics Voltage 3 V    
Current 1000 A or below
Torque
29.42 N m (21.70 lb ft) or more
Alternator Manufacturer     Mitsubishi Electronic Corporation