2019 YAMAHA VX-C engine

Description
20
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.
UF4G73E0.book Page 20 Friday, May 25, 2018 2:21 PM

Description
23
65 12 34 9 11
10 12 9
7 8
15
1413
1RiDE lever (VX / VX Deluxe / VX Cruiser /
VX Limited) (page 31)
2Start switch (page 27)
3Engine shut-off switch (page 27)
4Clip (page 27)
5Glove compartment (page 47)
6Remote control transmitter (VX Deluxe /
VX Cruiser / VX Limited) (page 25)
7Engine shut-off cord (lanyard) (page 27)
8Engine stop switch (page 27)
9Rearview mirror (VX / VX Deluxe /
VX Cruiser / VX Limited)
10Cruise assist up switch (VX Deluxe /
VX Cruiser / VX Limited) (page 36)
11Multifunction information center (page 38)
12Throttle lever (page 28)
13“SET” switch (VX Deluxe / VX Cruiser / VX
Limited) (page 36)
14Cruise assist down switch (VX Deluxe /
VX Cruiser / VX Limited) (page 36)15“NO-WAKE MODE” switch (VX Deluxe /
VX Cruiser / VX Limited) (page 34)
UF4G73E0.book Page 23 Friday, May 25, 2018 2:21 PM

Description
24
Engine compartment
1
6
7
10 2
345
89
1Fuse box
2Air filter case
3Spark plug/Ignition coil
4Oil tank
5Removable watertight storage compart-
ment (page 48)
6Water separator (page 29)
7Fuel tank
8Flushing hose connector (page 81)
9Oil tank filler cap/Dipstick
10Battery (page 61)
UF4G73E0.book Page 24 Friday, May 25, 2018 2:21 PM

Control function operation
26
EJU31385Yamaha Security System (VX Deluxe /
VX Cruiser / VX Limited)
The Yamaha Security System functions to
help prevent unauthorized use or theft of the
watercraft. The lock and unlock modes of the
security system can be selected by operating
the remote control transmitter that is included
with this watercraft. The engine cannot be
started if the lock mode of the security sys-
tem is selected. The engine can only be start-
ed if the unlock mode is selected. (See page
25 for information on the remote control
transmitter.)
TIP:
The Yamaha Security System settings can
only be selected while the engine is stopped.
EJU36776Yamaha Security System settings
The Yamaha Security System settings will be
confirmed by the number of beeps when the
remote control transmitter is operated, and
by the “UNLOCK” indicator light of the multi-
function information center. (See page 38 for
information on the multifunction information
center.)
TIP:
The beeper sounds two times for the nor-
mal operation mode or three times for the
Low RPM Mode. (See page 33 for Low
RPM Mode activation procedures.)
If the remote control transmitter is operated
while the multifunction information center
is in the standby state, the center will per-
form the initial operation, and then the set-
ting is selected.
To select the lock mode:
Push the lock button on the remote control
transmitter briefly. The beeper sounds once
and the “UNLOCK” indicator light blinks
once, then goes off. This indicates the lock
mode is selected.
To select the unlock mode:
Push the “L-Mode” (unlock) button on the re-
mote control transmitter briefly. The beeper
sounds two or three times and the “UN-
LOCK” indicator light blinks two or three
times, then comes on. This indicates the un-
lock mode is selected.
Number of
beepsYamaha Security
System mode“UN-
LOCK” in-
dicator
light
Lock Goes off
Unlock
(normal operation
mode)Comes
on
Unlock
(Low RPM Mode)Comes
on
1Lock button
2“UNLOCK” indicator light
1“L-Mode” (unlock) button
2“UNLOCK” indicator light
21
2L-Mode1
UF4G73E0.book Page 26 Friday, May 25, 2018 2:21 PM

Control function operation
27
EJU31153Engine 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.
EJU43631Start switch “ ”
NOTICE
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
1Engine stop switch
1Engine shut-off switch
2Clip
3Engine shut-off cord (lanyard)
1
1
2
3
UF4G73E0.book Page 27 Friday, May 25, 2018 2:21 PM

Control function operation
28
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.
VX / VX Deluxe / VX Cruiser / VX Limited:
RiDE lever is squeezed.
VX / VX Deluxe / VX Cruiser / VX Limited:
RiDE lever is malfunctioning.
VX Deluxe / VX Cruiser / VX Limited: Lock
mode of the Yamaha Security System has
been selected. (See page 26 for Yamaha
Security System setting procedures.)
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 (VX / VX Deluxe /
VX Cruiser / VX 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
1Throttle lever
1
1
1RiDE lever
1
UF4G73E0.book Page 28 Friday, May 25, 2018 2:21 PM

Control function operation
29
zle is changed, and the direction of the water-
craft is changed accordingly.
Since the strength of the jet thrust determines
the speed and degree of a turn, throttle must
always be applied when attempting a turn,
except at trolling speed.
This model is equipped with the Yamaha En-
gine Management System (YEMS) that in-
cludes an off-throttle steering (OTS) system.
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 sharply if you apply throttle
while turning the handlebars. The OTS sys-
tem does not function below planing speeds
or when the engine is off. Once the engine
slows down, the watercraft will no longer turn
in response to handlebar input until you apply
throttle again or you reach trolling speed.EJU35975Cooling water pilot outlet
When the engine is running, some of the
cooling water that is circulated in the engine
is discharged from the cooling water pilot
outlet.
There is a cooling water pilot outlet on the
port (left) side of the watercraft. To check for
proper operation of the cooling system, make
sure that water is being discharged from the
cooling water pilot outlet. If water is not being
discharged from the outlet, stop the engine
and check the jet intake for clogging. (See
page 95 for information on the jet intake.)
TIP:
It will take about 60 seconds for the water
to reach the outlet after the engine is start-
ed.
Water discharge may not be constant
when the engine is running at idling speed.
If this occurs, apply a little throttle to make
sure that water discharges properly.
EJU40323Water separator
The water separator prevents water from en-
tering the fuel tank by collecting any water
that has entered the fuel tank breather hose if
the watercraft was capsized.
1Handlebar
2Jet thrust nozzle
1
21Cooling water pilot outlet
1
UF4G73E0.book Page 29 Friday, May 25, 2018 2:21 PM

Control function operation
30
If water has collected in the water separator,
drain it by loosening the drain screw.
To drain water from the water separator:
(1) Place a drain pan or dry cloth under the
water separator.
(2) Gradually loosen the drain screw to drain
the water. Catch the draining water in the
drain pan or soak it up with the dry cloth
so that it does not spill into the engine
compartment. If any water spills into the
watercraft, be sure to wipe it up with a
dry cloth.
(3) Securely tighten the drain screw until it
stops.
1Water separator
2Drain screw
2
1
UF4G73E0.book Page 30 Friday, May 25, 2018 2:21 PM