- Four cycle
- Direct fuel injection
- Electronic unit injection
- Turbocharged
- Raw/Sea water aftercooled or separate circuit aftercooled (SCAC)
The electronic engine control system provides the following features:
- Engine monitoring
- Electronic governing
- Automatic air/fuel ratio control
- Torque rise shaping
- Injection timing control
- System diagnostics
Electronic unit injectors combine the metering of fuel (duration and timing) and the injection of fuel. Electronic unit injectors produce very high injection pressures.
The Electronic Control Module (ECM) controls the amount of fuel that is injected by varying the signals to the electronic unit injectors. High injection pressures help to reduce fuel consumption and emissions. The use of this type of electronic unit injector helps to provide precise control of injection timing. The injection timing varies with engine operating conditions thus optimizing engine performance for starting, emissions, noise, and fuel consumption.
The timing advance is achieved through the precise control of electronic unit injector firing. Engine rpm is controlled by adjusting the firing duration. A speed/timing sensor provides information to the ECM for detection of cylinder position and engine rpm.
The engine has built-in diagnostics that are used in order to ensure that all of the components function properly.
The cooling system consists of the following components:
- Gear driven centrifugal pump
- One water temperature regulator which regulates the engine coolant temperature
- Oil cooler
- Auxiliary water pump or a separate circuit aftercooled (SCAC)
- Raw/Sea water aftercooler
The engine lubricating oil, that is supplied by a gear type pump, is cooled. The engine lubricating oil is also filtered. Bypass valves provide unrestricted flow of lubrication oil to the engine components during the following conditions:
- High oil viscosity
- Plugged oil cooler or plugged oil filter elements (paper cartridge)
Note: Most illustrations represent typical right-hand service. The 3176C and 3196 Marine Engines are also available with left-hand service. The following items will be located on the left side for left-hand service:
- Fuel filter
- Oil filter
- Oil filler
- Oil level gauge
Several manufacturers offer marine transmissions through local distributors. Lubrication oil for the marine transmission can be cooled by an optional engine mounted transmission oil cooler (certain engine ratings).
Engine efficiency and maximum utilization of engine performance depend on the adherence to proper operation and maintenance recommendations. In addition, use recommended fuels, coolants, and lubricants.
Expected engine life is generally predicted by the average power demanded, based on fuel consumption of the engine over a time. Reduced hours of operation at full throttle and/or operating at reduced throttle settings result in a lower average power demand. Reduced hours of operation will increase the length of operating time before an engine overhaul is required
| |
| Illustration 1 | g00275578 |
|
Cylinder and valve locations (A) Exhaust valve. (B) Inlet valve. | |
| 3176C Marine Engine Specifications | |
| Cylinders and Arrangement | 6 In-Line |
| Bore | |
| Stroke | |
| Compression Ratio | 16:1 |
| Aspiration | TA(1) |
| Displacement | |
| Firing Order | 1-5-3-6-2-4 |
| Rotation (viewed from flywheel) | Counterclockwise |
| Valve Lash Setting (Inlet) | |
| Valve Lash Setting (Exhaust) | |
| (1) | Turbocharged Aftercooled |
| 3196 Marine Engine Specifications | |
| Cylinders and Arrangement | 6 In-Line |
| Bore | |
| Stroke | |
| Compression Ratio | 16:1 |
| Aspiration | TA(1) |
| Displacement | |
| Firing Order | 1-5-3-6-2-4 |
| Rotation (viewed from flywheel) | Counterclockwise |
| Valve Lash Setting (Inlet) | |
| Valve Lash Setting (Exhaust) | |
| (1) | Turbocharged Aftercooled |