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FUEL RECOMMENDATION
This engine is designed to operate on unleaded 87 or 89 octane gasoline. The
engine, with the proper fuel equipment, can also operate on dry fuel such as LPG
and NG.
NOTE: It is highly recommended that a Fuel Stabilizer, Ford Part Number E8AZ-
19C544-A or an equivalent additive be used for any length of storage. It is
imperative in any application where the fuel will not be consumed within thirty days.
-- Refer to "Storage - Indefinite Period" on page 38.
LPG fuel specifications must meet or exceed EN 589 (European) HD-5 (USA).
NG fuel specification must meet or exceed 38.7 MJ/m
3
(1050 BTU/ft
).
CAUTION: Use of 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, when using unleaded gasoline with 87 octane or
higher, or if you hear continuous spark knock while maintaining constant op-
erating 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.
3
(UK) 39.0 MJ/m
19
3
(USA)
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