2012 YAMAHA SUPERJET cooling

Table of contents
General and important labels ........... 1
Identification numbers .................... 1
Primary Identification (PRI-ID)
number ........................................... 1
Craft Identification Number (CIN) ...... 1
Engine serial number ........................ 1
Important labels .............................. 2
Warning labels ................................... 3
Other labels ....................................... 6
Safety information ............................. 7
Limitations on who may operate
the watercraft .............................. 7
Cruising limitations ......................... 8
Operation requirements ................. 9
Recommended equipment ........... 11
Hazard information ....................... 12
Watercraft characteristics ............. 12
Safe boating rules ........................ 13
Enjoy your watercraft
responsibly ................................ 14
Description....................................... 15
Watercraft glossary ...................... 15
Location of main components ...... 16
Control function operation ............. 18
Watercraft control functions ......... 18
Engine stop switch .......................... 18
Engine shut-off switch ..................... 18
Start switch ...................................... 18
Throttle lever ................................... 19
Steering system ............................... 19
Steering pole ................................... 19
Fuel cock knob ................................ 20
Choke knob ..................................... 20
Cooling water pilot outlet ................. 20
Water separator ............................... 21
Engine overheat warning system .... 21
Equipment operation ...................... 23
Equipment .................................... 23
Hood ................................................ 23Bow rope hole ................................. 24
Stern rope hole ................................ 24
Storage pouch ................................. 24
Fire extinguisher container .............. 25
Operation and handling
requirements ................................... 27
Fuel and engine oil
requirements ............................. 27
Fuel ................................................. 27
2-stroke engine oil ........................... 27
Mixing fuel and oil ............................ 27
Filling the fuel tank .......................... 28
Draining the bilge water ............... 29
Draining the bilge water on water .... 29
Transporting ................................. 30
First-time operation ........................ 31
Engine break-in ............................ 31
Pre-operation checks ..................... 32
Pre-operation checklist .................... 32
Pre-operation check points .......... 34
Pre-launch checks ........................... 34
Post-launch checks ......................... 38
Operation ......................................... 39
Operating your watercraft ............ 39
Getting to know your watercraft ....... 39
Learning to operate
your watercraft ............................. 39
Operating positions ......................... 39
Launching the watercraft ................. 40
Starting the engine on water ........... 40
Stopping the engine ........................ 42
Leaving the watercraft ..................... 42
Operating the watercraft .................. 42
Turning the watercraft ..................... 42
Stopping the watercraft ................... 44
Starting off ....................................... 44
Capsized watercraft ......................... 47
Beaching the watercraft ................... 48
Operating in weeded areas ............. 48
UF2F74E0.book Page 1 Monday, May 30, 2011 5:23 PM

Table of contents
After removing the watercraft
from the water .............................. 48
Care and storage ............................. 49
Post-operation care ...................... 49
Flushing the cooling water
passages ...................................... 49
Cleaning the watercraft ................... 50
Battery care ..................................... 50
Long-term storage ........................ 53
Cleaning .......................................... 53
Lubrication ....................................... 53
Rustproofing .................................... 54
Maintenance..................................... 55
Maintenance ................................. 55
Tool kit ............................................. 55
Adjusting the steering friction .......... 55
Adjusting the jet thrust nozzle
angle ............................................ 56
Periodic maintenance chart ............. 58
Checking the spark plugs ................ 59
Lubrication points ............................ 60
Checking the fuel filter ..................... 60
Adjusting the choke cable ............... 60
Adjusting the carburetor .................. 61
Specifications .................................. 62
Specifications ................................ 62
Trouble recovery ............................. 63
Troubleshooting ........................... 63
Troubleshooting chart ...................... 63
Emergency procedures ................ 65
Cleaning the jet intake and
impeller ........................................ 65
Jumping the battery ......................... 66
Replacing the fuse ........................... 66
Towing the watercraft ...................... 67
Submerged watercraft ..................... 67
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Description
16
EJU31011
Location of main components
2
1
3
45678
9
10
11
12 13
15 16
1Steering pole
2Steering pole cover
3Bow rope hole
4Fuel filler cap
5Cooling water pilot outlet
6Hood
7Hood latch
8Handlebars
9Storage pouch
10Riding tray
11Stern rope hole
12Jet thrust nozzle
13Ride plate
14Jet intake
15Drive shaft
16Intake grate
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Control function operation
20
EJU31123Fuel cock knob
The fuel supply method can be switched by
operating the fuel cock knob.
Select the fuel cock knob position from the fol-
lowing three positions according to the cir-
cumstances of use.
OFF:
With the fuel cock knob in this position, fuel
does not flow to the carburetors. Always turn
the fuel cock knob to this position when the
engine is not running.
ON:
With the fuel cock knob in this position, fuel
flows to the carburetors. Turn the fuel cock
knob to this position when starting the engine
and operating the watercraft.
RES:
With the fuel cock knob in this position, the
fuel reserve is made available. Turn the fuel
cock knob to this position if you run out of fuelwhile operating the watercraft. When this oc-
curs, refuel as soon as possible and be sure
to turn the fuel cock knob back to “ON”.
EJU31202Choke knob“”
The choke knob can be operated to supply a
richer air-fuel mixture that is required to start a
cold engine.
To use the choke:
Pull the choke knob out.
Push the choke knob in to stop using the
choke after the engine starts.
EJU31223Cooling water pilot outlet
When the engine is running, some of the cool-
ing water that is circulated in the engine is dis-
charged from the cooling water pilot outlet.
There is a cooling water pilot outlet on the port
(left) side of the watercraft. To check for prop-
er operation of the cooling system, make sure
1Fuel cock knob
1Choke knob
1Cooling water pilot outlet
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Control function operation
22
If the engine overheat warning system is acti-
vated, immediately reduce the engine speed,
return to shore, and then make sure that wa-
ter is being discharged from the cooling water
pilot outlet while the engine is running. If there
is no discharge of water, stop the engine, and
then check the jet intake for clogging. (See
page 65 for information on the jet intake.)
NOTICE: If you cannot locate and correct
the cause of the overheating, consult a
Yamaha dealer. Continuing to operate at
higher speeds could result in severe en-
gine damage.
[ECJ00041]
UF2F74E0.book Page 22 Tuesday, May 24, 2011 8:42 AM

Pre-operation checks
32
EJU31981
WARNING
EWJ00411
Failure to inspect or maintain the watercraft properly increases the possibility of an ac-
cident or damage to the watercraft. Do not operate the watercraft if you find any prob-
lem. If a problem cannot be corrected by the procedures provided in this manual, have
the watercraft inspected by a Yamaha dealer.
EJU41232Pre-operation checklist
Before using this watercraft, be sure to perform the checks in the following checklist.
ITEM ROUTINE PAGE
PRE-LAUNCH CHECKS
Engine compartmentVentilate the engine compartment.
Check inside the engine compartment for damage.34
Fuel systemCheck the fuel system for leakage.
Check the fuel level in the fuel tank.34
Water separatorCheck the water separator for water. 35
Engine unitCheck the exterior of the engine unit for damage. 35
Bilge waterCheck the engine compartment for bilge water. 35
BatteryCheck the battery connections and electrolyte level. 35
Steering systemCheck the steering system for proper operation. 35
Throttle leverCheck the throttle lever for proper operation.
Check the throttle lever free play.36
Engine shut-off cord (lan-
yard)Check the engine shut-off cord (lanyard) for dam-
age.37
SwitchesCheck the start switch, engine stop switch, and en-
gine shut-off switch for proper operation.37
Storage pouchCheck the storage pouch for damage and water.
Check that the storage pouch is securely installed.37
Fire extinguisher containerCheck the fire extinguisher container for damage. 38
Fire extinguisherCheck the condition of the fire extinguisher. 38
Safety equipmentCheck that safety equipment meeting the applicable
regulations is on board.38
Hull and deckCheck the hull and deck for damage. 38
Jet intakeCheck the jet intake for damage and clogging. 38
HoodCheck that the hood is securely closed. 38
POST-LAUNCH CHECKS
Cooling water pilot outletCheck that water is discharged from the cooling wa-
ter pilot outlet while the engine is running.38
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Pre-operation checks
38
pouch is securely installed. (See page 24 for
information on the storage pouch.)
EJU41071Fire extinguisher container checks
Make sure that the fire extinguisher container
is not damaged and is securely held in place.
(See page 25 for information on the fire extin-
guisher container.)
EJU32503Fire extinguisher check
Check that there is a full fire extinguisher on
board.
To check the fire extinguisher, see the instruc-
tions supplied by the fire extinguisher manu-
facturer. Always keep the fire extinguisher in
the fire extinguisher container.
Always carry a fire extinguisher on board. A
fire extinguisher is not standard equipment
with this watercraft. If you do not have one,
contact a Yamaha dealer or a fire extinguisher
dealer to obtain one meeting the proper spec-
ifications.
EJU40121Safety equipment check
Check that safety equipment meeting the ap-
plicable regulations is on board.
EJU32352Hull and deck check
Check the hull and deck for damage or other
problem.
EJU32656Jet intake checks
Make sure that the jet intake is not damaged
or clogged with weeds or debris. If the jet in-take is clogged, clean it. (See page 65 for in-
formation on the jet intake.)
EJU40702Hood check
Make sure that the hood is securely closed.
(See page 23 for information on the hood.)
EJU40144Post-launch checks
Perform the post-launch checks in the pre-op-
eration checklist while the watercraft is in the
water and the engine is running.
To perform the post-launch checks:
(1) Launch the watercraft. (See page 40 for
information on launching the watercraft.)
(2) Perform the checks and make sure that
there are no malfunctioning items or oth-
er problems.
EJU40552Cooling water pilot outlet check
Make sure that water is discharged from the
cooling water pilot outlet while the engine is
running. (See page 20 for information on the
cooling water pilot outlet.)
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Operation
48
see “Towing the watercraft” on page 67
or “Submerged watercraft” on page 67.)
NOTICE: Do not run the engine at full
throttle for at least 1 minute after the
engine has been restarted. Bilge water
in the engine compartment can splash
into the engine, which can result in se-
vere damage.
[ECJ00553]
EJU33302
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.
[EWJ00601] 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.
[ECJ00472]
(4) Get off the watercraft and pull it up on the
beach.
EJU37193Operating 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 intakearea, clean the jet intake. (See page 65 for in-
formation on the jet intake.)
EJU41060After removing the watercraft from the
water
NOTICE
ECJ01360
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 passag-
es.
To discharge water from the cooling water
passages:
(1) Make sure that the area around the wa-
tercraft is clear, and then start the engine.
(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.
UF2F74E0.book Page 48 Tuesday, May 24, 2011 8:42 AM