Specifications and requirements
25
●
Avoid getting water and contaminants in
the fuel tank. Contaminated fuel can
cause poor performance or engine dam-
age. Use only fresh gasoline that has
been stored in clean containers.
Gasoline with Ethanol
Two types of gasoline are commonly avail-
able in the U.S.A. for use in automobiles and
boats: conventional gasoline without Ethanol
and gasoline with Ethanol, which is typically
referred to as E10 gasoline. According to fed-
eral regulations, E10 gasoline may contain up
to 10% Ethanol.
A high quality gasoline without Ethanol is the
preferred fuel for your Yamaha outboard mo-
tor. However, if gasoline with Ethanol is the
only fuel available in your area, your Yamaha
outboard motor is calibrated to run properly
on fresh E10 gasoline that meets the mini-
mum octane requirement specified for this
model.
NOTICE
ECM02400
Never use a gasoline for your outboard
motor that contains more than 10% Etha-
nol, such as E85 which contains 85% Eth-
anol, or gasoline containing any amount
of Methanol. These fuels can cause start-
ing and running problems, as well as seri-
ous fuel system and internal engine
damage.
Gasoline containing ethanol has several
properties that may cause boat fuel system
problems.
● Ethanol is a strong solvent (cleaning agent)
that can clean gum and varnish deposits
from a boat’s fuel system, particularly in old-
er boats, as well as tanks and pipes used in
gasoline distribution. These released de-
posits contaminate the fuel and can cause
problems, such as clogged fuel filters, car-
buretors, or fuel injectors, which could re-
sult in engine damage.
●
Ethanol may dissolve resins used in the
construction of fiberglass fuel tanks. The
dissolved resins contaminate the fuel and
can cause problems, such as clogged fuel
filters, carburetors, or fuel injectors, which
could result in engine damage.
●
Ethanol is hygroscopic (has a strong attrac-
tion to water). Therefore, any water that in-
advertently enters the fuel system,
including moisture that is absorbed from the
air, will mix with the ethanol in the gasoline.
If the amount of water is excessive, the eth-
anol and water mixture will separate from
the gasoline in a layer at the bottom of the
fuel tank. This ethanol and water mixture is
very corrosive to aluminum fuel tanks and
fuel system components.
● The usable life span of E10 gasoline may
be shorter than the normal length of off-sea-
son boat storage, causing starting and run-
ning problems related to stale fuel.
For more information on using fuel containing
ethanol, visit: http://www.yamaha-motor.com
Gasoline Filtration
Yamaha outboard motors are equipped with
internal fuel filters. However, excessive water
or debris entering your engine’s fuel system
could prematurely clog the internal filters,
causing starting and running problems, fuel
system damage, and internal engine damage.
Therefore, it is recommended that an external
10-micron water-separating fuel filter be in-
stalled on your boat and serviced frequently.
Consult your authorized Yamaha dealer for a
10-micron filter that meets your engine’s re-
quirements.
U63P1DE0.book Page 25 Tuesday, March 29, 2011 7:15 PM
©2019 Yamaha Motor Corporation, U.S.A.
To Next Page
Loading...
