fuel YAMAHA SUPERJET 2008 Owner's Manual

Maintenance and care
53
EJU34201Checking the fuel system
WARNING
EWJ00370
Gasoline is highly flammable and explo-
sive. Failure to check for and repair any
fuel leakage could result in a fire or explo-
sion. A fire or explosion can cause severe
injury or death. Shut the engine off. Do not
smoke. Avoid spilling gasoline.
Check the fuel system for leaks, cracks, and
malfunctions. If any problem is found, do the
necessary repair or replacement as required.
If repair is necessary, consult a Yamaha deal-
er.
Check:

Carburetor for leakage.

Fuel tank filler cap and seal for damage.

Fuel in fuel tank for water and dirt.

Fuel tank for damage, cracks, and leakage.

Fuel hoses and joints for damage, cracks,
and leakage.

Fuel filter for leakage.

Fuel cock for leakage.

Air vent check valve for leakage.EJU34220Fuel filter
This watercraft is equipped with a one-piece,
disposable fuel filter. The fuel filter should be
replaced after the initial 10 hours or first
month of operation and every 200 hours or 24
months thereafter, or if water is found in the fil-ter. Have a Yamaha dealer replace the fuel fil-
ter if necessary.
WARNING
EWJ00360
Do not try to replace the fuel filter yourself.
An incorrectly installed filter can leak gas-
oline, which could result in a fire or explo-
sion. If necessary, have a Yamaha dealer
replace the fuel filter.
EJU34230Fuel tank
Check the fuel tank for leakage and for water
in the tank. If water is found in the fuel system,
or if the fuel tank needs to be cleaned, have a
Yamaha dealer service the watercraft.
EJU34321Checking the jet thrust nozzle angle
Check the handlebars and jet thrust nozzle for
smooth operation.
1Fuel filter
1Fuel tank
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Specifications
62
EJU34542
Specifications
Watercraft capacity:
Maximum people on board:
1 person
Dimensions:
Length:
2240 mm (88.2 in)
Width:
680 mm (26.8 in)
Height:
660 mm (26.0 in)
Dry weight:
139 kg (306 lb)
Performance:
Maximum output (according to ISO 8665/SAE
J1228):
48.50 kW@6250 r/min
Maximum fuel consumption:
29.0 L/h (7.7 US gal/h) (6.4 Imp.gal/h)
Cruising range at full throttle:
0.62 hour
Trolling speed:
1300 ±50 r/min
Engine:
Engine type:
2-stroke
Number of cylinders:
2
Engine displacement:
701 cm³
Bore & stroke:
81.0 × 68.0 mm (3.19 × 2.68 in)
Compression ratio:
7.2 : 1
Lubrication system:
Pre-mixed fuel and oil
Cooling system:
Water
Starting system:
Electric
Ignition system:
C.D.I.
Spark plug:
BR7HS
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Battery capacity:
12 V, 19.0 AhCharging system:
Flywheel magneto
Drive unit:
Propulsion system:
Jet pump
Jet pump type:
Axial flow, single stage
Impeller rotation:
Counterclockwise
Jet thrust nozzle angle:
P1: 14.4+14.4°
P2: 17.3+17.3°
Fuel and oil:
Recommended fuel:
Regular unleaded gasoline
Minimum octane rating (PON):
86
Minimum octane rating (RON):
90
Recommended engine oil:
YAMALUBE 2-W or TC-W3 outboard motor
oil or equivalent
Fuel mixing ratio (fuel to oil):
50 :1
Fuel tank total capacity:
18 L (4.8 US gal) (4.0 Imp.gal)
Fuel tank reserve capacity:
5.5 L (1.5 US gal) (1.2 Imp.gal)
UF2F70E0.book Page 62 Tuesday, April 17, 2007 9:56 AM

Trouble recovery
63
EJU34560
Troubleshooting
If you have any trouble with your watercraft, use this section to check for the possible cause.
If you cannot find the cause, or if the procedure for replacement or repair is not described in
this owner’s/operator’s manual, have a Yamaha dealer perform the necessary service.
EJU34570Troubleshooting chart
TROUBLE POSSIBLE CAUSE REMEDY PAGE
Engine does not
start (Starter motor
does not turn over)Engine shut-
off switchClip not in place Install clip
19
Fuse Burned out Replace fuse and
check wiring67
Battery Run down Recharge 60
Poor terminal con-
nectionsTighten as required
60
Terminal corroded Clean 48
Starter motor Faulty Have serviced by
Yamaha dealer—
Engine does not
start (Starter motor
turns over)Fuel cock Turned to “OFF”Turn fuel cock knob to
“ON”18
Fuel Empty Refill as soon as pos-
sible26
Stale or contaminat-
edHave serviced by
Yamaha dealer53
Fuel tank Water or dirt present Have serviced by
Yamaha dealer53
Spark plug Fouled or defective Clean or replace 57
Spark plug
capNot connected or
looseConnect properly
57
Crankcase Filled with water Crank engine with
plug out until clean68
Fuel filter Clogged or water
pooledHave serviced by
Yamaha dealer53
Choke Knob moves back on
its ownTighten choke knob
adjusting nut59
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Trouble recovery
64
Engine runs irregu-
larly or stallsFuel Empty Refill as soon as pos-
sible26
Stale or contaminat-
edHave serviced by
Yamaha dealer53
Too much oil in fuel
mixing ratioCorrect fuel-to-oil ra-
tio to 50:125
Choke Knob is left pulled Push fully in 20
Fuel filter Clogged or water
pooledHave serviced by
Yamaha dealer53
Fuel tank Water or dirt present Have serviced by
Yamaha dealer53
Spark plug Fouled or defective Replace 57
Incorrect heat range Replace 57
Gap incorrect Adjust 57
Spark plug
capLoose Connect properly 57
Cracked, torn or dam-
agedReplace
—
Electrical wir-
ingLoose electrical con-
nectionsTighten or connect
properly—
Carburetor Incorrect idle adjust-
mentAdjust idle
61
Clogged Have serviced by
Yamaha dealer61
Watercraft slow or
loses powerCavitation Jet intake clogged Clean 65
Impeller damaged or
wornHave serviced by
Yamaha dealer65
Engine over-
heatedJet intake clogged Clean
65
Fuel filter Clogged Have serviced by
Yamaha dealer53
Spark plug Fouled or defective Replace 57
Incorrect heat range Replace 57
Gap incorrect Adjust 57
Spark plug
capsLoose Connect properly
57
Fuel Stale or contaminat-
edHave serviced by
Yamaha dealer53 TROUBLE POSSIBLE CAUSE REMEDY PAGE
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Trouble recovery
68

Tow the watercraft using the bow rope
hole only.

The bow must be kept up out of the wa-
ter during towing to prevent water from
entering the engine compartment.
EJU34730Submerged watercraft
If the watercraft is submerged or flooded with
water, follow the procedure below and consult
a Yamaha dealer as soon as possible. Failure
to do so could result in serious engine dam-
age!
In an emergency:
(1) Beach the watercraft and remove the
hood. Turn the watercraft over far enough
to drain the water from the engine com-
partment.
CAUTION:
ECJ00700
Turning the watercraft on its side with the
hood removed could cause damage to the
steering pole. Use two people to provide
enough support to make sure that the
steering pole is not damaged.
(2) Turn the watercraft upright again.
(3) Turn the fuel cock knob to “OFF”.
(4) Remove the spark plugs and dry them
with a cloth.(5) Without reinstalling the spark plugs,
crank the engine until all of the water in
the cylinders has been drained.
(6) Install the spark plugs and the hood.
(7) Turn the fuel cock knob to “ON”.
(8) Launch the watercraft into the water, and
then run the engine for at least 10 min-
utes. If the engine does not start, repeat
steps 3–8.
(9) Shut the engine off.
(10) Turn the fuel cock knob to “OFF”, remove
the silencer cap, and then spray a rust in-
hibitor into the carburetor while cranking
the engine.
(11) Have the watercraft inspected by a
Yamaha dealer as soon as possible.
1Bow rope hole
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Index
2-stroke engine oil .................................... 25
B
Battery ................................................ 29, 48
Battery, checking...................................... 60
Battery, jumping ....................................... 66
Beaching the watercraft ........................... 43
Bilge ......................................................... 29
Boarding and starting in deep water ........ 39
Boarding and starting in shallow water .... 38
Bow rope hole .......................................... 22
C
Capsized watercraft ................................. 40
Carburetor, adjusting................................ 61
Choke cable, adjusting ............................. 59
Choke knob .............................................. 20
Cleaning the watercraft ............................ 48
Cooling water pilot outlet .................... 20, 32
Craft Identification Number (CIN) ............... 1
Cruising limitations ..................................... 8
E
Emergency procedures ............................ 65
Engine break-in ........................................ 33
Engine compartment ................................ 28
Engine overheat warning system ............. 22
Engine serial number ................................. 1
Engine shut-off cord ................................. 32
Engine shut-off switch .............................. 19
Engine stop switch ................................... 19
Enjoy your watercraft responsibly ............ 14
F
Filling the fuel tank ................................... 26
Fire extinguisher....................................... 29
Flushing the cooling system ..................... 46
Fuel and oil............................................... 25
Fuel cock knob ......................................... 18
Fuel filter .................................................. 53
Fuel system ........................................ 28, 47
Fuel system, checking.............................. 53
Fuel tank .................................................. 53
Fuel tank filler cap .................................... 18
Fuse, replacing......................................... 67
G
Gasohol .................................................... 25
Gasoline ................................................... 25Getting to know your watercraft ............... 36
H
Hazard information ................................... 12
Hood ......................................................... 17
Hull and deck ........................................... 28
I
Identification numbers ................................ 1
Important labels .......................................... 2
J
Jet intake .................................................. 31
Jet intake and impeller, cleaning .............. 65
Jet thrust nozzle angle, adjusting ............. 55
Jet thrust nozzle angle, checking ............. 53
Jumper cables, connecting ...................... 66
K
Kneeling ................................................... 37
L
Labels, other .............................................. 6
Labels, warning .......................................... 3
Launching the watercraft .......................... 33
Learning to operate your watercraft ......... 36
Leaving the watercraft .............................. 35
Limitations on who may operate
the watercraft .......................................... 7
Lubrication................................................ 47
Lubrication points ..................................... 58
M
Main components, location of .................. 15
Maintenance and adjustments ................. 49
Mixing fuel and oil .................................... 25
O
Operating positions .................................. 37
Operating your watercraft ......................... 36
Operation ................................................. 33
Operation of controls and
other functions ...................................... 17
Operation requirements ............................. 9
Owner’s/operator’s manual and tool kit .... 49
P
Periodic maintenance chart ...................... 51
Post-operation care .................................. 43
Pre-operation check list ............................ 27
Pre-operation check points ...................... 28
Pre-operation checks ............................... 27
Primary Identification (PRI-ID) number ...... 1
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