Gasoline Additives - Yamaha LF200 Owner's Manual

Specifications and requirements
on fresh E10 gasoline that meets the mini-
mum octane requirement specified for this
model.
ECM02401
NOTICE
Never use a gasoline for your outboard
motor that contains more than 10% Etha-
nol, such as E15 which contains 15% Eth-
anol or E85 which contains 85% Ethanol,
or gasoline containing any amount of
Methanol. These fuels can cause starting
and running problems, as well as serious
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
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
18
the fuel system,
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.
EMU41340

Gasoline Additives

Gasoline blends change to meet automobile
emission regulations and economic condi-
tions. Additives, added by gasoline distribu-
tors, necessary for proper automobile engine
operation and durability, may not be sufficient
for typical boat applications. Intake valve and
combustion chamber deposits may accumu-
late in boat engines more rapidly than en-
countered in automotive use. In addition,
gasoline used for boating will typically age
longer between refills than gasoline used in
automobiles, resulting in stale and unusable
gasoline that may cause starting and running
problems, fuel system damage, and internal
engine damage.
Yamaha recommends the use of two Ya-
malube gasoline additives to reduce internal
deposits and extend the storage life of gaso-