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Use only unleaded gasoline. The use of lead-
ed gasoline will cause severe damage to
internal engine parts, such as the valves and
piston rings, as well as to the exhaust
system.
Your Yamaha engine has been designed to use
regular unleaded gasoline with a pump octane
number ([R+M]/2) of 86 or higher, or research
octane number of 91 or higher. If knocking or
pinging occurs, use a different brand of gasoline
or premium unleaded fuel. Unleaded fuel will
give you longer spark plug life and reduced
maintenance cost.
Gasohol
There are two types of gasohol; gasohol con-
taining ethanol and that containing methanol.
Gasohol containing ethanol can be used if
ethanol content does not exceed 10%. Gasohol
containing methanol is not recommended by
Yamaha because it may cause fuel system
damage or vehicle performance problems.
5-4
POTENTIAL HAZARD
Improper care when refueling.
WHAT CAN HAPPEN
Fuel can spill, which can cause a fire and
severe injury.
Fuel expands when it heats up. If the fuel
tank is overfilled, fuel could spill out due
to heat from the engine or the sun.
HOW TO AVOID THE HAZARD
Do not overfill the fuel tank. Be careful not
to spill fuel, especially on the engine or
exhaust pipe. Wipe up any spilled fuel
immediately. Be sure the fuel tank cap is
closed securely.
Do not refuel right after the engine has
been running and is still very hot.
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WARNING
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