Uniden WHAMx4BK Manual del operador descargar pdf (Pagina 27)

Vivace Boat Information Book Web Version (BIB) (Rev February 13, 2014)

Revision 6 Page | 27

Fuel System Operating Notes

Contamination of fuel is the most likely cause of engine stoppage. If either filter

is full of sediment, fuel will not pass through. To check and rectify this problem:

1. Follow primary filter sediment chamber draining procedure (below) carefully to

minimize introduction of air into fuel lines.

2. For serious contamination, replace primary filter element with spare from

spares box (see procedures below.)

3. Opening any part of the fuel system will introduce air that will interrupt fuel

flow and cause engine stoppage.

4. When opening any part of the fuel system, be ready with drip containers and

absorbent material to prevent fuel contamination of bilge that will be pumped

overboard. A drip pan, waste fluids bottle and funnels are under the starboard

settee.

5. Diesel fuel spilled on electrical wiring can soften insulation.

6. Only a case of extreme contamination would require replacement of the

secondary filter. If necessary:

a. Remove filter cover.

b. Replace filter element with spare from spares box.

7. If it is necessary to bleed the fuel system, follow this sequence (sequence is in

direction of fuel flow from lift pump to injection pump):

a. Pressurize lines with manual lift pump lever (see photo above).

b. Bleed secondary fuel filter nipple until fuel is free of bubbles.

c. Bleed injection pump banjo bolt nipple until fuel is free of bubbles. (Usually

not necessary.) (See photo above.)

8. Injectors should not require bleeding. If they do (indicated by engine will not

start after bleeding low pressure lines):

a. Open the throttle fully

Note

During maintenance operations at the dock, the fuel lines can easily be

pressurized for bleeding by pressurizing the fuel tank with a shop vac hose

inserted in the fuel filler. If this method is used, place a cloth over the shop

vac nozzle to prevent debris from being blown into the tank.

Fuel system Contamination and Air Bleeding

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Uniden WHAMx4BK Manual del operador Pagina 27