Honda EXW171S Owner's Manual page 13

Gasolines Containing Alcohol
If you decide to use a gasoline containing alcohol ("gasohol"), be sure its
octane rating is at least as high as that recommended by Honda. There are
two types of "gasohol": that containing ethanol, and that containing
methanol. Do not use gasohol that contains more than 10% ethanol. Do
not use gasoline containing methanol (methyl or wood alcohol) that does
not also contain cosolvents and corrosion inhibitors for methanol. Never
use gasoline containing more than 5% methanol, even if it has cosolkents
and corrosion inhibitors.
NOTE:
l
Fuel system damage or engine performance problems resulting from the
use of such fuels are not covered under Power Equipment Warran-
ties.Honda cannot endorse the use of fuels containing methanol since
evidence of their suitability is as yet incomplete.
l
Before purchasing fuel from an unfamiliar station, try to confirm
whether the fuel contains alcohol, and to what percentage. If you notice
any undesirable operating symptoms after using a gasoline that contains
alcohol, or one that you think contains alcohol, switch to a gasoline that
you know does not contain alcohol.
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