2010 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 ................................ 19
Choke knob ..................................... 20
Cooling water pilot outlet ................. 20
Water separator ............................... 21
Engine overheat warning system .... 21
Equipment operation ...................... 22
Equipment .................................... 22
Hood ................................................ 22Bow rope hole ................................. 23
Stern rope hole ................................ 23
Storage pouch ................................. 23
Fire extinguisher container .............. 24
Operation and handling
requirements ................................... 26
Fuel and engine oil
requirements ............................. 26
Fuel ................................................. 26
2-stroke engine oil ........................... 26
Mixing fuel and oil ............................ 26
Filling the fuel tank .......................... 27
Draining the bilge water ............... 28
Draining the bilge water on water .... 28
Transporting ................................. 28
First-time operation ........................ 30
Engine break-in ............................ 30
Pre-operation checks ..................... 31
Pre-operation checklist .................... 31
Pre-operation check points .......... 33
Pre-launch checks ........................... 33
Post-launch checks ......................... 37
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
UF2F72E0.book Page 1 Friday, May 22, 2009 5:11 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
Lubrication points ............................ 59
Checking the fuel filter ..................... 59
Checking the spark plugs ................ 59
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
UF2F72E0.book Page 2 Friday, May 22, 2009 5:11 PM

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
UF2F72E0.book Page 16 Friday, May 22, 2009 5:11 PM

Control function operation
20
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 fuel
while 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.
EJU31222Cooling 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
that water is being discharged from the cool-
ing water pilot outlet. If water is not being dis-
charged from the outlet, stop the engine and
1Fuel cock knob
1Choke knob
1Cooling water pilot outlet
UF2F72E0.book Page 20 Friday, May 22, 2009 5:11 PM

Control function operation
21
check the jet intake for clogging. (See page
65 for information on the jet intake.)
TIP:

If the cooling water passages are dry, it will
take about 20 seconds for the water to
reach the outlet after the engine is started.

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.
EJU40321Water 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.
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) Tighten the drain screw securely.
EJU31664Engine overheat warning system
If the engine temperature rises significantly,
the engine overheat warning system will acti-
vate and the engine speed will be limited to
about 3400 r/min to help prevent damage.
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]
1Water separator
1Drain screw
1
UF2F72E0.book Page 21 Friday, May 22, 2009 5:11 PM

Pre-operation checks
31
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.
EJU31995Pre-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.33
Fuel systemCheck the fuel system for leakage.
Check the fuel level in the fuel tank.33
Water separatorCheck the water separator for water. 34
Engine unitCheck the exterior of the engine unit for damage. 34
Bilge waterCheck the engine compartment for bilge water. 34
BatteryCheck the battery connections and electrolyte level. 34
Steering systemCheck the steering system for proper operation. 34
Throttle leverCheck the throttle lever for proper operation.
Check the throttle lever free play.35
Engine shut-off cord (lan-
yard)Check the engine shut-off cord (lanyard) for dam-
age.36
SwitchesCheck the start switch, engine stop switch, and en-
gine shut-off switch for proper operation.36
Storage pouchCheck the storage pouch for damage and water.
Check that the storage pouch is securely installed.36
Safety equipmentCheck that safety equipment meeting the applicable
regulations is on board.37
Fire extinguisher containerCheck the fire extinguisher container for damage. 37
Fire extinguisherCheck the condition of the fire extinguisher. 37
Hull and deckCheck the hull and deck for damage. 37
Jet intakeCheck the jet intake for damage and clogging. 37
HoodCheck that the hood is securely closed. 37
POST-LAUNCH CHECKS
Cooling water pilot outletCheck that water is discharged from the cooling wa-
ter pilot outlet while the engine is running.38
UF2F72E0.book Page 31 Friday, May 22, 2009 5:11 PM

Pre-operation checks
38
EJU40551Cooling 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 more information.)
UF2F72E0.book Page 38 Friday, May 22, 2009 5:11 PM

Operation
48
craft” on page 67 or “Submerged water-
craft” on page 67.) NOTICE: Do not run
the engine at full throttle for at least 1
minute after the engine has been re-
started. Bilge water in the engine com-
partment can splash into the engine,
which can result in severe 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.
EJU37192Operating 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 to the full throttle
position and relax your grip on the throttle le-
ver 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 thejet intake. (See page 65 for jet intake cleaning
procedures.)
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.
UF2F72E0.book Page 48 Friday, May 22, 2009 5:11 PM