High Altitude Operation - Yamaha EF2600FW Owner's Manual

High Altitude Operation

This engine may require a high altitude carburetor kit to ensure correct engine opera-
tion at altitudes above 4000 ft. (1219 meters). If you operate your engine at altitudes
above 4000 ft. (1219 meters) consistently, have your local Yamaha dealer perform the
necessary carburetor modification. This engine should be operated in its original config-
uration below 4000 ft. (1219 meters) as damage may occur if high altitude carburetor kit
is installed and operated below 4000 ft. (1219 meters).
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