27 Operator's Manual.. - Marlow-Hunter, LLC

fuel in the supply lines to the filters and engines ). Disconnecting
these fittings without properly bleeding the system of fuel could
result in emptying the fuel filters and causing a fuel spill. Only
a qualified technician should ever make repairs to your fuel
system.
The fuel supply valves are the “ball type” valves. Turning
the handle so it is perpendicular to the valve body shuts
off the supply or return. Turning the handle so it is in line
with the valve body opens the valve, as shown in Fig.
5.4.
Example of Fuel Supply Lines and Valves
Hunter 27 • Fuel Systems
due to contaminated fuel.
In the Figure. 5.6, page 5.7 you will find an illustration
for the Racor Fuel Water separator (commonly referred
to as the fuel filter). This will break down the components
of the filter and their uses within the filter.
Flow of fuel.
Fig. 5.5
To service the filter:
1. Make sure the engine is off.
Open
Closed
Rotating the handle 90° from the
fuel line, closes the valve.
Fig. 5.4
2. Close shut-off valve between fuel tank and filter if
applicable.
3. Open vent plug on mounting head with a ½” wrench.
Note: Do not leave drain open for very long as it will
empty filter of all fuel.
5.4 Filters (Fuel Water Separators)
The fuel supplied to the engine may contact impurities
found in the fuel tanks or in the fuel from your supplier.
If these impurities are not removed prior to starting
the engine, performance may be seriously affected.
Removal of the fuel impurities is accomplished by external
fuel filters.
5.4.1 Main Engine Filters
Each engine has a separate filter located away from the
engine. Check the Fuel Arrangement illustration at the
end of this chapter for the exact location of these filters.
An authorized service technician should replace all filters
annually prior to spring launch. They may need more frequent
replacement if you notice poor engine perfomance
4. When fuel is detected coming out of drain, close drain
quickly.
5. Close vent plug and tighten snugly.
6. Open shut off valve.
Follow priming instructions.
Consult your owner’s packet for more information concerning
this filter or for replacement parts.
5.4.5 Here are some general guidelines for fueling
your boat:
! CAUTION !
Using the wrong type of fuel will result in severe
damage to the engines. Refer to your owner’s
manual for fuel recommendations.
5.5