2021 YAMAHA EX DELUXE engine

Safety information
14
EJU44610
Hazard information
Never start the engine or let it run for any
length of time in an enclosed area. Exhaust
fumes contain carbon monoxide, a color-
less, odorless gas that may cause loss of
consciousness and death within a short
time. Always operate the watercraft in an
open area.
Do not touch the hot oil tank, muffler, or en-
gine during or immediately after engine op-
eration; they can cause serious burns.
Do not place magnets or objects with a
strong magnetic force near the throttle lever
or RiDE lever (EX DELUXE / EX LIMITED).
The electronic throttle mechanism of the le-
vers can be adversely affected, which could
cause loss of control. In addition, do not
place objects susceptible to magnetic forc-
es (i.e., credit cards, watches, etc.) close to
the throttle lever or RiDE lever.
EJU44341
Watercraft characteristics
Jet thrust turns the watercraft. Releasing
the throttle lever completely produces only
minimum thrust. If you are traveling at
speeds above trolling, you will have rapidly
decreasing ability to steer without throttle.
This model is equipped with the Yamaha
Engine Management System (YEMS) that
includes an off-throttle steering (OTS) sys-
tem. It will activate at planing speeds
should you attempt to steer the watercraft
after releasing the throttle lever. The OTS
system assists in turning by continuing to
supply some thrust while the watercraft is
decelerating, but you can turn more sharp-
ly if you apply throttle while turning the han-
dlebars.
The OTS system does not function below
planing speeds or when the engine is off.
Once the engine slows down, the water-
craft will no longer turn in response to han-
dlebar input until you apply throttle again or
you reach trolling speed.
Practice turning in an open area without
obstacles until you have a good feel for this
maneuver.
EX: This watercraft is water-jet propelled.
The jet pump is directly connected to the
engine. This means that jet thrust will pro-
duce some movement whenever the en-
gine is running. There is no “neutral”
position.
EX SPORT: This watercraft is water-jet pro-
pelled. The jet pump is directly connected
to the engine. This means that jet thrust will
produce some movement whenever the
engine is running. There is no “neutral” po-
sition. You are in either “forward” or “re-
verse”, depending upon the shift lever
position.
UF3Y74E0.book Page 14 Monday, June 22, 2020 5:11 PM

Safety information
15
EX SPORT: Do not use the reverse function
to slow down or stop the watercraft as it
could cause you to lose control, be eject-
ed, or impact the handlebars.
This could increase the risk of back/spinal
injury (paralysis), facial injuries, and broken
legs, ankles, and other bones. You could
also damage the shift mechanism.
EX SPORT: Reverse can be used to slow
down or stop during slow-speed maneu-
vering, such as when docking. Once the
engine is idling, shift into reverse and grad-
ually increase engine speed. Make sure
that there are no obstacles or people be-
hind you before shifting into reverse.
EX DELUXE / EX LIMITED: This watercraft
is water-jet propelled. The jet pump is di-
rectly connected to the engine. This means
that jet thrust will produce some movement
whenever the engine is running and the “F”
(forward) or “R” (reverse) shift indicator is
displayed. When the “N” (neutral) shift indi-
cator is displayed, the forward and reverse
thrust are balanced to help keep the water-
craft from moving in either direction, al-
though some movement may occur.
EX DELUXE / EX LIMITED: To avoid rear-
end collisions while operating the water-
craft, check behind you before using the
RiDE lever to slow down or stop the water-craft. Make sure that there are no obstacles
or people behind you before shifting into
reverse.
Keep away from the intake grate while the
engine is on. Items such as long hair, loose
clothing, or PFD straps can become entan-
gled in moving parts, resulting in severe in-
jury or drowning.
Never insert any object into the jet thrust
nozzle while the engine is running. Severe
injury or death could result from coming in
contact with the rotating parts of the jet
pump.
Stop the engine and remove the clip from
the engine shut-off switch before removing
any debris or weeds, which may have col-
lected around the jet intake.
1
“N” (Neutral position)
1
1Intake grate
2 Jet thrust nozzle
1 Clip
2 Engine shut-off switch
1
2
2
1
UF3Y74E0.book Page 15 Monday, June 22, 2020 5:11 PM

Safety information
18
EJU30992
Enjoy your watercraft responsibly
You share the areas you enjoy when riding
your watercraft with others and with nature.
So your enjoyment includes a responsibility
to treat these other people, and the lands,
waters, and wildlife with respect and courte-
sy.
Whenever and wherever you ride, think of
yourself as the guest of those around you.
Remember, for example, that the sound of
your watercraft may be music to you, but it
could be just noise to others. And the exciting
splash of your wake can make waves others
won’t enjoy.
Avoid riding close to shoreline homes and
waterfowl nesting areas or other wildlife ar-
eas, and keep a respectful distance from fish-
ermen, other boats, swimmers, and
populated beaches. When travel in areas like
these is unavoidable, ride slowly and obey all
laws.
Proper maintenance is necessary to ensure
that the exhaust emission and sound levels of
your watercraft will continue to be within reg-
ulated limits. You have the responsibility to
make sure that the recommended mainte-
nance in this owner’s/operator’s manual is
carried out.
Remember, pollution can be harmful to the
environment. Do not refuel or add oil where a
spill could cause damage to nature. Remove
your watercraft from the water and move it
away from the shoreline before refueling. Dis-
pose of water and any fuel and oil residue in
the engine compartment according to local
regulations. And keep your surroundings
pleasant for the people and wildlife that share
the waterways: don’t litter. When you ride responsibly, with respect and
courtesy for others, you help ensure that our
waterways stay open for the enjoyment of a
variety of recreational opportunities.
UF3Y74E0.book Page 18 Monday, June 22, 2020 5:11 PM

Description
19
EJU43331
Watercraft glossary
Trolling speed
“Trolling” is the lowest maneuvering speed. You are applying little or no throttle. The water-
craft is down in the water, and there is no wake.
Sub-planing speed
“Sub-planing” is a medium speed. The bow of the watercraft is slightly up from the water sur-
face, but you are still traveling through the water. There is a wake.
Planing speed
“Planing” is a faster speed. The watercraft is more level and is skimming on top of the water.
There is a wake.
Bow
The front end of the watercraft.
Stern
The rear end of the watercraft.
Starboard
The right side of the watercraft when facing forward.
Port
The left side of the watercraft when facing forward.
Bilge water
Water that has collected in the engine compartment.
Yamaha Engine Management System (YEMS) YEMS is an integrated, computerized management system that controls and adjusts ignition
timing, fuel injection, engine diagnostics, and the off-throttle steering (OTS) system.
Reverse with Intuitive Deceleration Electronics (RiDE)
RiDE is an electronic system that controls the reverse, neutral, and deceleration operations of
the watercraft.
UF3Y74E0.book Page 19 Monday, June 22, 2020 5:11 PM

Description
22
12
EX DELUXE / EX LIMITED
EX / EX SPORT 2
11 10
3 36
4
7
8
9
4
5
1
RiDE lever (EX DELUXE / EX LIMITED)
(page 29)
2 Start switch (page 24)
3 Engine shut-off switch (page 24)
4 Rearview mirror (EX SPORT / EX DELUXE /
EX LIMITED)
5 Clip (page 24)
6 Throttle lever (page 25)
7 Multifunction information center (page 32)
8 Shift lever (EX SPORT) (page 28)
9 Glove compartment (page 40)
10 Engine shut-off cord (lanyard) (page 24)
11 Engine stop switch (page 24)
UF3Y74E0.book Page 22 Monday, June 22, 2020 5:11 PM

Description
23
Engine compartment
8
3
1011
4
2
1
56
7
9
1 Water separator (page 26)
2 Fuel tank
3 Air filter case
4 Flushing hose connector (page 74)
5 Oil tank filler cap/Dipstick (page 45)
6 Oil tank
7 Battery (page 54)
8 Fuse box 9
Spark plug/Ignition coil
10 Fire extinguisher holder (page 42)
11 Seat storage compartment (page 41)
UF3Y74E0.book Page 23 Monday, June 22, 2020 5:11 PM

Control function operation
24
EJU31026
Watercraft control functionsEJU31153Engine stop switch “ ”
The engine stop switch (red button) stops the
engine when the switch is pushed.
EJU31164Engine shut-off switch “ ”
The engine shut-off switch automatically
stops the engine when the clip, on the end of
the engine shut-off cord (lanyard), is removed
from the switch, such as if the operator falls
off the watercraft.
Insert the clip under the engine shut-off
switch before starting the engine.
When the engine is not running, remove the
clip from the engine shut-off switch to pre-vent accidental starting or unauthorized op-
eration by children or others.
EJU44350Start switch “ ”ECJ01311
Do not run the engine over 4000 r/min on
land. Also, do not run the engine for more
than 15 seconds without supplying water,
otherwise the engine could overheat.
The start switch (green button) starts the en-
gine when the switch is pushed.
Release the start switch as soon as the en-
gine starts to run. If the engine does not start
in 5 seconds, release the start switch, wait 15
seconds, and then try again.
NOTICE: Never
push the start switch while the engine is
running. Do not operate the start switch
for more than 5 seconds, otherwise the
battery will be discharged and the engine
1 Engine stop switch
1 Engine shut-off switch
2 Clip
3 Engine shut-off cord (lanyard)
1
1
2
3
UF3Y74E0.book Page 24 Monday, June 22, 2020 5:11 PM

Control function operation
25
will not start. Also, the starter motor could
be damaged.
[ECJ01041]
The engine will not start under any of the fol-
lowing conditions:
Clip is removed from the engine shut-off
switch.
Throttle lever is squeezed.
Throttle lever is malfunctioning.
EX DELUXE / EX LIMITED: RiDE lever is
squeezed.
EX DELUXE / EX LIMITED: RiDE lever is
malfunctioning.
EJU31212Throttle lever
The throttle lever increases the engine speed
when the lever is squeezed.
The throttle lever returns automatically to its
fully closed (idle) position when released.
EJU43342RiDE lever (EX DELUXE / EX LIMITED)
When the RiDE lever is squeezed, the reverse
gate lowers and the watercraft starts moving
in reverse. If the watercraft is moving forward,
the watercraft gradually slows down until it
stops, and then the watercraft starts moving
in reverse.
When the RiDE lever is released, it automati-
cally returns to its fully closed (idle) position
and the reverse gate moves to the neutral po-
sition.
EJU31262Steering system
By turning the handlebars in the direction you
wish to travel, the angle of the jet thrust noz-
1Start switch
1 Throttle lever
1
1
1RiDE lever
1
UF3Y74E0.book Page 25 Monday, June 22, 2020 5:11 PM