Maintenance: Fuel system
52
Fuel pre-filter. Check
WARNING! Working on or approaching a run-
ning engine is a safety hazard. Beware of rotat-
ing parts and hot surfaces.
The fuel pre-filter/water separator are accessories
and available as single or dual models.
The dual filter is equipped with a pressure gauge (1)
indicating when it is time to change the filter insert.
The filter inserts must be changed according to the
maintenance schedule recommendations or ealier if
the pressure gauge indicates a vacuum of 6–10 in.
Hg at idling speed or 16–20 in. Hg at full engine
speed/load.
Fuel pre-filter. Drainage
Place a receptacle under the filter. Drain off water
and contaminants through the plug (1) in the bottom
of the bowl.
IMPORTANT! Do not drain until a few hours af-
ter stopping.
Fuel pre-filter. Change filter elements
The fuel pre-filter/water separator are accessories
and available as single or dual models.
The dual filter inserts can be changed while running
as the flow of fuel can be cut off to one filter container
at a time.
The flow of fuel is governed by putting the knob (1) in
the following positions:
A: Normal running (both filters connected).
B: Left filter insert can be changed.
C: Right filter insert can be changed.
D: Both filters turned off.
1
A
D
BC
1
1
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