Specifications and requirements
13
EMU36361
Fuel requirements
EMU44791
Gasoline
Use a good quality gasoline that meets the minimum octane
requirement. If knocking or pinging occurs, use a different
brand of gasoline or premium unleaded fuel. Yamaha rec-
ommends that you use alcohol-free gasoline (see Gasoline
with Ethanol) whenever possible.
The use of a poor quality gasoline may result in starting and
running problems. If you encounter drivability problems,
which you suspect could be related to the fuel you are using,
Yamaha recommends that you switch to a recognized high
quality brand of gasoline, such as a gasoline that is adver-
tised as Top Tier Detergent Gasoline. (North America only)
NOTICE:
Failure to comply with these recommendations
may also result in unscheduled maintenance, fuel sys-
tem damage, and internal engine damage.
[ECM04480]
For North America
For Oceania
NOTICE
ECM01982
Do not use leaded gasoline. Leaded gasoline can seri-
ously damage the engine.
Avoid getting water and contaminants in the fuel tank.
Contaminated fuel can cause poor performance or en-
gine damage. Use only fresh gasoline that has been
stored in clean containers.
Gasoline with Ethanol
Two types of gasoline are commonly available in the U.S.A.,
Canada, Australia and New Zealand for use in automobiles
and boats: conventional gasoline without Ethanol and gaso-
line with Ethanol, which is typically referred to as E10 gaso-
line. According to federal regulations, E10 gasoline may
contain up to 10% Ethanol.
A high quality gasoline without Ethanol is the preferred fuel
for your Yamaha outboard motor. 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 minimum octane requirement spec-
ified for this model.
NOTICE
ECM02402
Never use a gasoline for your outboard motor that con-
tains more than 10% Ethanol, such as E15 which con-
tains 15% Ethanol 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, par-
ticularly in older boats, as well as tanks and pipes used in
gasoline distribution. These released deposits contami-
nate the fuel and can cause problems, such as clogged
fuel filters, carburetors, or fuel injectors, which could result
in engine damage.
Ethanol may dissolve resins used in the construction of fi-
berglass 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 attraction to water).
Therefore, any water that inadvertently enters the fuel sys-
tem, including moisture that is absorbed from the air, will
mix with the ethanol in the gasoline. If the amount of water
is excessive, the ethanol 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 alumi-
num fuel tanks and fuel system components.
The usable life span of E10 gasoline may be shorter than
the normal length of off-season boat storage, causing
starting and running 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 fil-
ters. However, excessive water or debris entering your en-
gine’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 requirements.
EMU41342
Gasoline Additives
Gasoline blends change to meet automobile emission regu-
lations and economic conditions. Additives, added by gaso-
line distributors, necessary for proper automobile engine
operation and durability, may not be sufficient for typical
boat applications. Intake valve and combustion chamber
deposits may accumulate in boat engines more rapidly than
encountered in automotive use. In addition, gasoline used
for boating will typically age longer between refills than gas-
oline 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 Yamalube gasoline ad-
ditives to reduce internal deposits and extend the storage
life of gasoline. Continuous use of Yamalube Ring Free Fuel
Recommended fuel:
Premium unleaded gasoline
Min. pump octane number (PON):
89
Recommended fuel:
Premium unleaded gasoline
Min. research octane number (RON):
94
U6GR30E0.book Page 13 Thursday, April 12, 2018 9:28 AM
©
2019 Yamaha Motor Corporation, U.S.A.
