2021 YAMAHA SUPERJET cooling

Operation
56
EJU41062After removing the watercraft from
the water
ECJ01361
Do not run the engine for more than 15
seconds on land without supplying water,
otherwise the engine could overheat.
After operating and removing the watercraft
from the water, promptly discharge the re-
maining water from the cooling water pas-
sages.
To discharge water from the cooling water
passages:
(1) Make sure that the area around the wa- tercraft is clear, and then start the en-
gine.
(2) Discharge the remaining water out of the cooling water passages by alternately
squeezing and releasing the throttle lever
quickly for 10 to 15 seconds.
(3) Stop the engine.
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Care and storage
57
EJU37148
Post-operation careEWJ00332
Always place the watercraft upright in a
horizontal position when storing it, other-
wise fuel could leak out into the engine or
engine compartment, which could create
a fire hazard.
After using the watercraft, always take it out
of the water, clean it, and store it. Leaving the
watercraft in the water for extended periods
will accelerate the rate of normal deteriora-
tion of the jet pump and hull. Marine organ-
isms and corrosion are some of the
conditions that can shorten the life of many
watercraft components.
EJU3351BFlushing the cooling water passagesECJ01361
Do not run the engine for more than 15
seconds on land without supplying water,
otherwise the engine could overheat.
Flush the cooling water passages to prevent
them from clogging with salt, sand, or dirt.
(1) Place the watercraft in a horizontal posi-tion.
(2) Remove the hood. (See page 26 for hood removal and installation procedures.) (3) Connect the garden hose adapter to a
garden hose.
(4) Loosen the flushing hose connector cap and remove it. Insert the garden hose
adapter into the flushing hose connector
by pushing and twisting it until it is se-
curely connected.
(5) Connect the garden hose to a water tap.
(6) Make sure that the area around the wa- tercraft is clear, and then start the en-
gine. Immediately after the engine starts,
turn the water supply on gradually until
1Garden hose adapter
2 Garden hose
1 Flushing hose connector
2 Flushing hose connector cap
3 Garden hose adapter
12
2
1
3
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Care and storage
58
water flows out continually from the
cooling water pilot outlet.
(7) Run the engine at idling speed for about 3 minutes watching the engine condition.
If the engine stops while flushing, turn
the water supply off immediately and
perform the procedure again from step 6.
NOTICE: Do not supply water to the
cooling water passages when the en-
gine is not running. The water could
flow back through the muffler into the
engine, causing severe engine dam-
age.
[ECJ00123]
(8) Turn the water supply off.
(9) Discharge the remaining water out of the cooling water passages by alternately
squeezing and releasing the throttle lever
quickly for 10 to 15 seconds.
(10) Stop the engine.
(11) Remove the garden hose adapter, and then securely install the flushing hose
connector cap by tightening it until it
stops.
(12) Securely install the hood in its original position.
EJU40746Cleaning the watercraft
(1) Remove the hood. (See page 26 for hoodremoval and installation procedures.)
(2) If the watercraft will be stored for a week or more, rustproof the internal engine
components to help prevent corrosion. (See page 61 for information on rust-
proofing the internal engine compo-
nents.)
(3) Rinse the engine and engine compart- ment with a small amount of water.
NOTICE: Do not use high-pressure
water when rinsing the engine or en-
gine compartment as severe engine
damage could result.
[ECJ00572]
(4) Drain the water from the engine com- partment. (See page 35 for information
on draining the bilge water.)
(5) Wipe the engine and engine compart- ment with a dry cloth.
(6) Wash down the hull, deck, and jet pump with fresh water.
(7) Wipe the hull, deck, and jet pump with a dry cloth.
(8) Wipe all vinyl and rubber components, such as the engine compartment seals,
with a vinyl protectant.
(9) To minimize corrosion, spray metallic parts of the hull, deck, and engine with a
rust inhibitor.
(10) Allow the engine compartment to air dry completely before installing the hood.
(11) Securely install the hood in its original position.
EJU3368CBattery care
If the watercraft will not be used for more than
a month, remove the battery from the water-
craft, check it, and then store it in a cool, dry
place.
EWJ00793
Battery electrolyte is poisonous and dan-
gerous, causing severe burns, etc. Elec-
trolyte contains sulfuric acid. Avoid
contact with skin, eyes, or clothing.
Antidotes
External: Flush with water.
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Care and storage
60
(4) Store the battery in a cool, dry place.NOTICE: Storing the battery in an un-
charged condition can cause perma-
nent battery damage. Check the
battery periodically.
[ECJ00103]
To install the battery:
(1) Place the battery in the battery compart- ment and hook the battery bands onto
the holders.
(2) Connect the positive (+) battery lead (red) to the positive (+) battery terminal.
NOTICE: Reversal of the battery leads
will damage the electrical parts.
[ECJ00262]
(3) Connect the negative (–) battery lead (black) to the negative (–) battery termi-
nal.
(4) Make sure that the battery is securely held in place.
EJU33495
Long-term storageEWJ00332
Always place the watercraft upright in a
horizontal position when storing it, other-
wise fuel could leak out into the engine or
engine compartment, which could create
a fire hazard.
Storage for long periods of time, such as win-
ter storage, requires preventive maintenance
to ensure against deterioration. It is advisable
to have the watercraft serviced by a Yamaha
dealer prior to storage.
However, the following procedures can be
performed easily by the owner.
EJU40763Cleaning
(1) Flush the cooling water passages. (See
page 57 for information on flushing the
cooling water passages.)
TIP:
If you will be storing the watercraft for a pro-
longed period, such as winter storage, top off
the fuel tank with fresh gasoline and add fuel
stabilizer and conditioner to the fuel tank ac-
cording to the manufacturer’s instruction be-
fore starting the engine.
(2) Clean the watercraft. (See page 58 for in-formation on cleaning the watercraft.)
Wax the hull with a non-abrasive wax.
EJU45730Lubrication
Use a suitable marine grease applicator and
spray a rust inhibitor between the inner and
outer cables to lubricate the cables and
purge out any dirt and moisture.
To keep moving parts sliding or rotating
smoothly, lubricate them with water-resistant
grease.
Recommended water-resistant grease:
YAMALUBE MARINE
GREASE/Yamaha Grease A
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Maintenance
66
EJU43103Periodic maintenance chart
The periodic maintenance chart gives general guidelines for periodic maintenance. Have a
Yamaha dealer perform the checks in the following chart. However, maintenance may need to be performed more frequently depending on your operating conditions. If you have any
questions, consult a Yamaha dealer.
This “ √” mark indicates items to be checked and serviced by a Yamaha dealer.
Item OperationInitial Thereafter every
Page
10 hours 50 hours
or 12
months *1 100
hours or 12
months *1 200
hours or 24
months *1
Fuel line Check fuel hoses and
clamps
√
—
Fuel filler cap/Wa-
ter separator Check O-rings for cracks
and deformation
√
—
Fuel tank Check installation and
straps
√
—
Water inlet strainer Check for clogs and dam-
age
√
—
Cooling water hos-
es Check for damage and
leakage, and check
clamps
√
—
Engine oil Replace √√ 68
Oil filter Replace √68
Spark plugs Check √√ —
Battery Check state of charge,
terminals and bands
√
—
Battery leads Check terminals √—
Steering master Check and adjust √√ —
Steering cable Check exterior and con-
nections, and lubricate
√
—
Air intake hoses Check for damage, and
check clamps
√
—
Throttle body Lubricate throttle valve √—
Exhaust system Check for exhaust leak-
age, and check hoses and
clamps √
—
Breather hose Check breather hose and
clamps
√
—
Impeller Check for bends, dam-
age, and foreign material
√
—
Drive shaft spline Check for damage and lu-
bricate splines √
—
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Specifications
69
EJU45442
Specifications
Watercraft capacity:
Maximum people on board:1 person
Maximum load capacity: 80 kg (176 lb)
Dimensions and weight:
Length:
2.43 m (95.7 in)
Width: 0.76 m (29.9 in)
Height: 0.79 m (31.1 in)
Dry weight: 170 kg (375 lb)
Performance:
Maximum output (according to ISO 8665/SAE
J1228):
74.6 kW at 7300 r/min
Maximum fuel consumption: 29.1 L/h (7.7 US gal/h, 6.4 Imp.gal/h)
Cruising range at full throttle: 0.65 hour
Trolling speed:
1500 ±100 r/min
Engine:
Engine type:
Liquid cooled 4-stroke, DOHC
Number of cylinders:
3
Engine displacement: 1049 cm³
Bore × stroke:
82.0 × 66.2 mm (3.23 × 2.61 in)
Compression ratio:
11.0 : 1
Valve clearance-intake (cold): 0.15–0.22 mm (0.0059–0.0087 in)
Valve clearance-exhaust (cold): 0.26–0.32 mm (0.0102–0.0126 in)
Lubrication system:
Dry sump
Cooling system: Water
Starting system: Electric
Ignition system:
T.C.I. Spark plug (NGK):
CR9EB
Spark plug gap: 0.7–0.8 mm (0.028–0.031 in)
Battery capacity:
12 V, 18 Ah
Battery type: YTX20L-BS
Charging system: Flywheel magneto
Drive unit:
Propulsion system:Jet pump
Jet pump type: Axial flow, single stage
Impeller rotation: Counterclockwise
Jet thrust nozzle angle:
P1: 16.0+16.0°
P2: 19.0+19.0°
Fuel and oil:
Recommended fuel:Regular unleaded gasoline
Minimum octane rating (PON): 86
Minimum octane rating (RON):
90
Recommended engine oil: YAMALUBE 4W or 4-stroke motor oil
Recommended engine oil type SAE: SAE 10W-30, 10W-40, 20W-40, 20W-50
Recommended engine oil grade API:
API SG, SH, SJ, SL
Fuel tank total capacity: 19 L (5.0 US gal, 4.2 Imp.gal)
Engine oil quantity with oil filter replacement: 3.4 L (3.59 US qt, 2.99 Imp.qt)
Engine oil quantity without oil filter replacement:
3.2 L (3.38 US qt, 2.82 Imp.qt)
Engine oil total quantity: 3.7 L (3.91 US qt, 3.26 Imp.qt)
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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
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