Honda FR600 Owner's Manual page 13

If spark knock or pin ing occurs at a steady engine speed, under
normal load, than e rands of gasoline. If spark knock or pinging
it
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persists, see an aut orized Honda tiller dealer.
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Running the engine with persistent spark knock or pinging can cause
engine damage.
NOTE:
Running the engine with persistent spark knock or pinging is
considered misuse, and the Distributor's Limited Warranty does not
cover parts damaged by misuse.
Oxygenated fuels
Some conventional gasolines are being blended with alcohol or an
ether compound. These
asolines are collectively referred to as oxy-
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enated fuels. To meet c ean air standards, some areas of the United
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tates and Canada use oxy enated fuels to help reduce emissions.
If you use an oxygenated uel, be sure it is unleaded and meets the
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minimum octane rating requirement.
Before using an oxygenated fuel, try to confirm the fuel's contents.
Some states/provinces require this information to be posted on the
'; P F! dllowing are the EPA approved percentages of oxygenates:
I
ETHANOL- (ethyl or grain alcohol) 10% by volume
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You may use gasoline containing up to 10% ethanol
by volume. Gasoline containin ethanol may be mar-
keted under the name "Gasoho 9 ".
MTBE- (methyl tertiary butyl ether) 15% by volume
You may use gasoline containing up to 15% MTBE by vol-
ume.
METHANOL- (methyl or wood alcohol) 5% by volume
You may use gasoline containing up to 5%
methanol by volume as long as it also contains
cosolvents and corrosion inhibitors to protect the fu-
el system. Gasoline containing more than 5%
methanol by volume may cause starting and/or per-
formance roblems. It may also damage metal, rub-
ber, and p astic parts of your fuel system. P
If you notice any undesirable operating symptoms, try another service
station or switch to another brand of gasoline.
Fuel system dama e or performance problems resulting from the use
of an oxygenated
7 uel containing more than the percentages of oxy-
genates mentioned above are not covered under warranty.
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