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FUEL RECOMMENDATION
This engine is designed to operate on dry fuel such as LPG Grade HD5 or NG
3
(1050 BTU/ft.
).
CAUTION: Use of commercial and non-commercial fuels rated lower than the
grades specified above may cause persistent, heavy spark knock, which can
lead to engine damage. If your engine knocks heavily, or if you hear contin-
uous spark knock while maintaining constant operating speeds, consult
your distributor or another qualified technician.
Fuel Quality
Using a high quality gasoline will help maintain the power, fuel economy and
emissions performance of your engine. A properly formulated gasoline will be
comprised of well refined hydrocarbons and chemical additives and will perform
the following functions:
•
Minimize varnish, lacquer, and other induction system deposits.
•
Prevent gum formation or other deterioration during storage.
•
Protect fuel tank and other fuel system components from corrosion or
degradation.
•
Provide the correct seasonally and geographically adjusted volatility. This will
provide easy starting in the winter and avoid vapor lock in the summer.
•
Avoid fuel system icing.
In addition, the fuel will be free of water, debris, and other impurities.
We also recommend that the fuel supply be kept fresh; when the equipment is in
storage (especially in hot weather), the fuel tank should be kept at least 3/4 full.
If you anticipate storage of your engine in excess of two months, consult your
distributor or other qualified technician. Also refer to the information on storage in
the "Maintenance Instructions" section of this manual.
Alcohol Gasoline Blends (Gasohol)
Gasohol is a mixture of gasoline and ethanol or methanol.
CAUTION: If not properly formulated with appropriate cosolvents and corro-
sion inhibitors, such blends may cause performance problems or damage
emissions and fuel system materials. Discontinue use if performance prob-
lems occur. To avoid jeopardizing the engine warranty and incurring unnec-
essary repair cost, do not use blends containing more than 10% ethanol by
volume or 5% methanol by volume, or blends that do not contain cosolvents
and corrosion inhibitors. Do not use such fuels unless they are unleaded.
Ethanol (C8H16) is an alcohol based fuel. There are basically two ways to produce
ethanol. One way is the fermentative method. This method is based on the
fermentation of ethanol from corn, sugar cane, cellulose, and other alternative
crops. The other way is the catalytic hydrolysis of ethylene, a petroleum product, is
the primary synthetic method. Compared to gasoline the energy content of ethanol
is 66%. Ford engines should operate satisfactory on gasohol blends using
unleaded gasoline and containing no more than 10% ethanol by volume.
Cosolvents and corrosion inhibitors must also be added. The blend must also have
an octane (anti-knock) index of 87 or 89, reference to engine specification section.
18
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