Honda Outboard Motor BF5A Owner's Manual page 13

2. Fuel Level
Check the fuel gauge and refill the tank if the fuel level is low.
NOTE: Open the vent knob before removing the fuel filler cap. When the
vent knob is firmly closed, the cap will be difficult to remove.
Your engine is designed to use any gasoline that has a pump oc-
tane number (y ) of 86 or higher, or that has a research octane number
of 91 or higher. Gasoline pumps at service stations normally display the
pump octane number.
We recommend that you use unleaded fuel because it produces fewer
engine and spark plug deposits and extends the life of exhaust system
components.
Never use stale or contaminated gasoline or an oil/gasoline mixture. Avoid
getting dirt, dust or water in the fuel tank. Use of a lower octane gasoline
can cause persistent "pinging" or heavy "spark knock" (a metallic rapp-
ing noise) which, if severe, can lead to engine damage.
CAUTION: If "spark knock" or "pinging" occurs at a steady engine
speed under normal load, change brands of gasoline. If spark knock or
pinging persists, 'consult your authorized Honda dealer. Failure to do so is
considered misuse, and damage caused by misuse is not covered by
Honda's Limited Warranty.
Occasionally, you may experience light spark knock while operating under
heavy loads. This is no cause for concern, it simply means your engine is
operating efficiently.
Fuel tank capacity: 13 &' (3.4 U.S. gal.)
FUEL GAUGE
FUEL FILLER CAP
After refueling, be sure to tighten the fuel tank cap firmly.
~ m
Gasoline is extremely flammable and is explosive under certain
conditions.
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