2021 YAMAHA SUPERJET warning

Operation
49
that the engine shut-off cord (lanyard)
is attached correctly. If the engine
shut-off cord (lanyard) is not attached
correctly, it may not pull free when the
operator falls off, allowing the water-
craft to continue to run and cause an
accident.
[EWJ00583]
(3) With the throttle lever released, push thestart switch (green button) to start the
engine. (See page 20 for information on
operating the start switch.)
EJU45710Stopping the engine
Release the throttle lever, and then push the
engine stop/“L-MODE” switch (red button) to
stop the engine. WARNING! You need
throttle to steer. Shutting the engine off
can cause you to hit an obstacle you are attempting to avoid. A collision could re-
sult in severe injury or death.
[EWJ00602]
EJU32874
Leaving the watercraft
If leaving the watercraft, remove the clip from
the engine shut-off switch to prevent acci-
dental starting or unauthorized operation by
children or others.
EJU41173Operating the watercraft
When the engine is running, the watercraft
will move forward at trolling speed even if the
1 Clip
2 Engine shut-off switch
3 Engine shut-off cord (lanyard)
3
1
2
UF4R71E0.book Page 49 Monday, May 10, 2021 1:14 PM

Operation
55
Do not put your hands in the intake
grate.
If the watercraft capsizes, turn it over imme-
diately.
To upright the watercraft:
(1) Remove the clip from the engine shut-offswitch.
(2) Swim to the rear of the watercraft. Turn the watercraft over in either direction by
grabbing both sides.
(3) Start the engine and operate the water- craft at planing speed to drain the bilge
water from the engine compartment.
(See page 35 for information on draining
the bilge water. If the engine does not
start, see “Towing the watercraft” on
page 73 or “Submerged watercraft” on
page 74.) NOTICE: Do not run the en-
gine at full throttle for at least 1 minute
after the engine has been restarted.
Bilge water in the engine compart- ment can splash into the engine,
which can result in severe damage.
[ECJ00554]
EJU33304
Beaching the watercraft
To beach the watercraft:
(1) Make sure that there are no boats, swim- mers, or obstacles near the beach.
(2) Release the throttle lever to reduce speed about 90 m (300 ft) before you
reach the intended beaching area.
(3) Slowly approach the beach and stop the engine just before reaching land.
WARNING! You need throttle to steer. Shutting the engine off can cause you
to hit an obstacle you are attempting
to avoid. A collision could result in se-
vere injury or death.
[EWJ00602] NOTICE:
Never run the engine in water that is
less than 60 cm (2 ft) deep from the
bottom of the watercraft, otherwise
pebbles or sand could be sucked into
the jet intake, causing impeller dam-
age and engine overheating.
[ECJ00473]
( 4 ) G e t o f f t h e w a t e r c r a f t a n d p u l l i t u p o n t h e beach.
EJU37194Operating in weeded areas
Always avoid using your watercraft in areas
where weed growth is thick. If operating in
weeded areas is unavoidable, alternately
squeeze the throttle lever and relax your grip
on the throttle lever to vary the engine speed.
Weeds tend to become clogged more when
operating at a steady speed and at trolling
speed. If weeds may have clogged the intake
area, clean the jet intake. (See page 72 for in-
formation on the jet intake.)
UF4R71E0.book Page 55 Monday, May 10, 2021 1:14 PM

Care and storage
61
Throttle cable
Steering cable ball joint (handlebar end)
and steering cable inner wire (handlebar
end)
TIP:
Disconnect the steering cable (handlebar
end) from the ball joint before lubricating.
Steering cable (jet thrust nozzle end) and
ball joint
TIP:
Disconnect the steering cable from the ball
joint before lubricating.
EJU45861RustproofingECJ01361
Do not run the engine for more than 15
seconds on land without supplying water,
otherwise the engine could overheat.
Spray metallic parts of the hull and engine
with a rust inhibitor.
To rustproof the internal engine components:
(1) Remove the hood. (See page 26 for hoodremoval and installation procedures.)
(2) While loosening the clamp, remove the breather hose.
(3) Make sure that the area around the wa- tercraft is clear, and then start the engine
in a well-ventilated area.
(4) Run the engine at a fast idle.
(5) Quickly spray as much rust inhibitor as possible into the air intake duct through
the breather hose joint. Keep spraying
until the engine stalls (or a maximum of
15 seconds). WARNING! Do not pour or
spray gasoline, or any substance oth-
er than a rust inhibitor, into the air in-
take duct. Do not spray flammable
Recommended water-resistant grease:
YAMALUBE MARINE GREASE /
Ya m a h a G r e a s e A
UF4R71E0.book Page 61 Monday, May 10, 2021 1:14 PM

Trouble recovery
71
Engine runs irregu-
larly or stallsFuel Fuel tank empty Refill as soon as pos-
sible31
Stale or contaminat-
ed Have serviced by
Yamaha dealer
—
Fuel tank Water or dirt present Have serviced by Yamaha dealer—
Spark plug Fouled or defective Have serviced by Yamaha dealer—
Incorrect heat range Have serviced by Yamaha dealer —
Gap incorrect Have serviced by Yamaha dealer —
Electrical wir-
ing Loose connection Have serviced by
Yamaha dealer —
Fuel injec-
tion system Faulty or clogged in-
jectors Have serviced by
Yamaha dealer
—
Warning light or in-
dicator blinks or
comes on Fuel level
warning
Fuel tank empty Refill as soon as pos-
sible 31
Oil pressure
warning Oil pressure dropped Have serviced by
Yamaha dealer 24
Engine over-
heat warning Jet intake clogged Clean
72
Check en-
gine warning Faulty sensors Have serviced by
Yamaha dealer 25
Watercraft slow or
loses power Cavitation Jet intake clogged Clean 72
Impeller damaged or
worn Have serviced by
Yamaha dealer
72
Engine over-
heat warning Engine speed reduc-
tion control activated Clean jet intake and
cool engine
25
Oil pressure
warning Engine speed reduc-
tion control activated Add oil
24
Spark plug Fouled or defective Have serviced by Yamaha dealer—
Incorrect heat range Have serviced by Yamaha dealer —
Gap incorrect Have serviced by Yamaha dealer —
Electrical wir-
ing Loose connection Have serviced by
Yamaha dealer —
Fuel Stale or contaminat- ed Have serviced by
Yamaha dealer
—
Throttle lever Faulty Have serviced by Yamaha dealer—
L-MODE L-MODE is activat- ing. Deactivate the L-
MODE.
23
T
R

OUBLE
POSSIBLE CAUSE REMEDYPAGE
UF4R71E0.book Page 71 Monday, May 10, 2021 1:14 PM

75
Index
A
After removing the watercraft from the water ..................................................... 56
B
Battery care.............................................. 58
Battery checks ......................................... 42
Battery, jumping....................................... 73
Beaching the watercraft ........................... 55
Bilge water check..................................... 42
Bilge water, draining ................................ 35
Bilge water, draining on land ................... 35
Bilge water, draining on water ................. 35
Boarding and starting in deep water........ 54
Boarding and starting in shallow water.... 53
Bow eye ................................................... 28
C
Capsized watercraft ................................. 54
Check engine warning ............................. 25
Cleaning ................................................... 60
Cleaning the watercraft ............................ 58
Communication disconnecting warning ................................................. 25
Cooling water pilot outlet ......................... 22
Cooling water pilot outlet check .............. 46
Craft Identification Number (CIN)............... 1
Cruising limitations..................................... 9
E
Emergency procedures ............................ 72
Engine break-in ........................................ 38
Engine compartment check ..................... 41
Engine oil ................................................. 33
Engine oil and oil filter .............................. 68
Engine oil level check............................... 42
Engine oil requirements ........................... 33
Engine overheat warning ......................... 25
Engine serial number ................................. 1
Engine shut-off cord (lanyard) check ....... 44
Engine shut-off switch ............................. 20
Engine stop/“L-MODE” switch ................ 20
Engine unit check..................................... 41
Enjoy your watercraft responsibly............ 15
Equipment ................................................ 26
F
Fire extinguisher check ............................ 45
Fire extinguisher holder............................ 29 Fire extinguisher holder, cover, and
band checks ......................................... 45
Flushing the cooling water passages....... 57
Fuel .......................................................... 31
Fuel level check........................................ 41
Fuel level meter ........................................ 24
Fuel level warning..................................... 24
Fuel requirements .................................... 31
Fuel system checks ................................. 41
G
Getting to know your watercraft .............. 47
Glossary, watercraft ................................. 16
H
Handlebar position, adjusting .................. 65
Hazard information................................... 13
Hood ........................................................ 26
Hood check .............................................. 46
Hull and deck check ................................ 45
I
Identification numbers ............................... 1
Indicator lights.......................................... 24
J
Jet intake and impeller, cleaning.............. 72
Jet intake checks ..................................... 45
Jet thrust nozzle angle, adjusting ............ 64
Jumper cables, connecting ...................... 73
L
Labels, important ....................................... 3
Labels, other .............................................. 7
Labels, warning .......................................... 4
Launching the watercraft ......................... 48
Learning to operate your watercraft......... 47
Leaving the watercraft.............................. 49
Limitations on who may operate the watercraft ................................................ 8
L-MODE ................................................... 23
Long-term storage ................................... 60
Lubrication ............................................... 60
M
Main components, location of ................. 17
Maintenance............................................. 63
Manufactured date label ............................ 2
Meter ........................................................ 24
Meter check ............................................. 46
UF4R71E0.book Page 75 Monday, May 10, 2021 1:14 PM

Index
76
O
Oil pressure warning ................................ 24
Operating in weeded areas ...................... 55
Operating positions.................................. 47
Operating the watercraft .......................... 49
Operating your watercraft ........................ 47
Operation requirements ........................... 10
P
Periodic maintenance chart ..................... 66
Post-launch checks ................................. 46
Post-operation care ................................. 57
Pre-launch checks ................................... 41
Pre-operation check points ..................... 41
Pre-operation checklist ............................ 39
Primary Identification (PRI-ID) number ...... 1
R
Reboarding holder ................................... 28
Recommended equipment ...................... 12
Rustproofing ............................................ 61
S
Safe boating rules .................................... 14
Safety equipment check .......................... 45
Start switch .............................................. 20
Starting off ............................................... 52
Starting the engine on water .................... 48
Steering friction, adjusting ....................... 63
Steering pole ............................................ 22
Steering pole check ................................. 43
Steering system ....................................... 21
Steering system checks ........................... 42
Stern drain plug checks ........................... 45
Stern eyes ................................................ 28
Stopping the engine ................................. 49
Stopping the watercraft ........................... 51
Storage pouch ......................................... 28
Storage pouch checks ............................. 44
Submerged watercraft ............................. 74
Switch checks .......................................... 44
T
Throttle lever ............................................ 21
Throttle lever checks ................................ 43
Towing the watercraft .............................. 73
Transporting on a trailer ........................... 36
Troubleshooting ....................................... 70
Troubleshooting chart .............................. 70Turning the watercraft .............................. 50
W
Water separator ....................................... 22
Water separator check ............................. 41
Watercraft characteristics ........................ 13
Watercraft control functions..................... 20
Watercraft operation modes .................... 23
UF4R71E0.book Page 76 Monday, May 10, 2021 1:14 PM