5.2 Fuel Lines
Locate the fuel return line as far as practical from the fuel pickup to allow the tank fuel to cool the return fuel before delivery back to the fuel injectors. Incoming fuel cools the injectors to achieve maximum engine efficiency.
Note: Do not tee into the main propulsion engine’s fuel line.
Under no circumstances should the propulsion engine and generator set share pickup or return lines (through a tee arrangement) that would allow the larger engine to starve fuel from the smaller engine. It is possible that the operation of either engine could completely drain the fuel line of the other engine and make starting difficult.
Use a flexible hose section to connect the metallic line from the fuel tank to the engine’s fuel pump inlet connection point. Also, use a flexible hose section to connect the metallic line from the fuel tank to the fuel return connection point. The flexible section allows the generator set to vibrate during operation.
| Fuel Line |
| ID Size |
Model | mm (in.) |
|
|
3.5EFOZ and 4EOZ | 6.4 (1/4) |
|
|
9.7 (3/8) | |
|
|
Figure 5-2 Fuel Line ID Size
See Figure 5-2 for the ID size of the customer-supplied fuel line that connects to the fuel pump and fuel return. Route the fuel lines from the fuel tank in a gradual incline to the engine—do not exceed the height of the generator set and do not route fuel lines above the generator set. Comply with USCG Regulation 46CFR182.20 regarding fuel lines and supports.
See Section 7 for fuel feed pump inlet connection and fuel return line connection.
5.3 Fuel Filters
Conform to USCG Regulations regarding inline fuel filters or strainers.
5.4 Fuel Pump Lift
See Figure 5-3 for fuel pump lift capabilities.
| Fuel | |
| Pump | |
| Lift | |
Model | m (ft.) | |
|
| |
3.5/4/6.5/8.5/9/11/11.5/13/16/17.5/19/20/23/ |
| |
27EFOZ and | 1.2 (4) | |
4/5/8/10/13/14/15.5/20/23/24/28/32EOZ |
| |
|
| |
33/40/55/70/80/100/125EFOZ | 0.9 (3) | |
and 40/50/65/80/99/125/150EOZ | ||
| ||
|
| |
Figure |
|
5.5 Fuel Consumption
Consult the current generator set specification sheets for generator set fuel consumption rates.
18 Section 5 Fuel System |