6-16 Installation TP-5393 9/93
Fuel System
Gasoline
For best results, use only clean, fresh, regular grade
unleaded gasoline with a pump sticker octane rating of
87 or higher in the U.S.A. In countries using the
research rating method, it should be 90 octane
minimum.
Gasohol containing no more than 10% ethanol can be
used if unleaded gasoline is unavailable. Never use
gasohol containing more than 10% ethanol or gasoline
containing Methanol. Oil must not be mixed with the
fuel.
The GASOLINE fuel system for the generator set must
be designedto operate independently of the systemfor
vehicle engine if both engines are to be operated at the
same time. The best way to do this is to haveseparate
fuel tanks; however, this is usually impractical because
ofspacerestrictions.In mostinstallations,bothengines
operate from a common tank with a separate dip tube
arrangement as shown in Figure 6-20. This prevents
the smaller engine from being starved of fuel by the
larger engine. The generator set dip tube is generally
shorterthanthevehiclediptube.Withthisarrangement
fuelmay not beavailable to the generator set whenfuel
supply is low.
A simpletee fittingissometimesusedtoprovidefuelfor
both engines off a common tank; however, this usually
prohibits simultaneous operation. There is also the
possibility that operation of either engine could
completely drain the fuel line and even the carburetor
fuel bowl of the other engine, thus making starting
difficult if not impossible. The tee arrangement should
be avoided or used only as a last resort.
1
2
3
1. Fuel line to generator set
2. Fuel line to vehicle engine
3. Keep fuel line away from exhaust
Figure 6-20. Two Dip Tubes in Fuel Tank
NOTE
Donot teeinto fuelinjected fuelsystems. Usea twodip
tubearrangementforfuelsupply.Consult anauthorized
Kohler service dealer for furtherfuel system installation
information.
Care must be taken when routing the fuel line from the
main tank to the generator set. Keep fuel lines as short
as possible but maintain adequate clearance from
exhaust system. Fuellines must berunalongtheframe
orundercarriage—neverrunfuellinesinsidethecoach.
Locate fuel lines below the generator set compartment
withentry point nearfuelpump. Thefuel line must beof
adequate size to handle the flow of fuel and withstand
road shock and year-round climate conditions. If steel
tubing is used, it should be 1/8 in. (3.2 mm) I.D.
(minimum) with an 8 in. (230 mm) (minimum) flexible
section to allow free movement of the generator set.
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