E
1-12
EMU00025
GASOLINE (PETROL)
If knocking or pinging occurs, use a differ-
ent brand of gasoline or premium unlead-
ed fuel. If unleaded gasoline is not avail-
able, then leaded regular gasoline can be
used.
If leaded gasoline is usually used, engine
valves and related parts should be
inspected after every 300 hours of opera-
tion.
Recommended gasoline:
Regular unleaded gasoline with a
minimum octane rating of 86 (Pump
Octane Number) = (R+M)/2
EMB50610
Gasohol
There are two types of gasohol: gasohol
containing ethanol and that containing
methanol. Gasohol containing ethanol
can be used if ethanol content does not
exceed 10% and the fuel meets minimum
octane ratings. Gasohol containing
methanol is not recommended by
Yamaha because it can cause fuel system
damage or engine performance prob-
lems.
66M-9-15-1 5/10/01 9:39 AM Page 17
Summary of Contents for F15A
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