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Maintenance: Fuel System
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56
Twin fuel pre-filter/water separator
WARNING! Working on or approaching a running
engine is a safety hazard. Beware of rotating
parts and hot surfaces.
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 earlier if
the pressure gauge indicates a vacuum of 6–10 inHg
at idling speed or 16–20 inHg at full engine speed/
load.
Draining the fuel filter
Place a drip pan 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 after
stopping.
Changing the filter elements
The dual filter inserts can be changed while the engine
is running as the flow of fuel can be cut off to one fil-
ter container at a time.
The flow of the fuel is governed by turning the handle
(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.
If the engine is not running close the fuel cocks on the
tank before changing filters. If the engine is running
cut off the flow of fuel with the handle (1) on the filter
itself.
WARNING! Working on or approaching a
running engine is a safety hazard. Beware of
rotating parts and hot surfaces.
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