Maintenance and care
67
If the steering is stiff or misadjusted, have a
Yamaha dealer service it.
EJU34360Checking and adjusting the throttle
cable
Check that the throttle cable moves back to
the set position smoothly and that the throttle
lever free play is within specification.
(1) Squeeze and release the throttle lever. If
the throttle lever does not return smooth-
ly, have a Yamaha dealer service it.(2) Adjust the free play by loosening the lock-
nut and turning the adjuster.
EJU34371Cleaning and adjusting the spark
plugs
WARNING
EWJ00350
Be careful not to damage the insulator
when removing or installing a spark plug.
A damaged insulator could allow sparks to
escape, which could result in a fire or ex-
plosion.
The spark plug is an important engine compo-
nent and is easy to inspect. The condition of
the spark plug can indicate something about
the condition of the engine. For example, if the
center electrode porcelain is very white, this
could indicate an intake air leak or carburetion
problem in that cylinder. Do not attempt to di-
agnose any problems yourself. Have a
Yamaha dealer service the watercraft.
Remove and inspect the spark plugs periodi-
cally; heat and deposits will cause the spark
plugs to slowly break down and erode. If elec-
trode erosion becomes excessive, or if carbon Difference of A and B:
Maximum 5 mm (0.20 in)
1Locknut
2Adjuster
3Throttle lever free play
Throttle lever free play:
4.0–7.0 mm (0.16–0.28 in)
UF1G74E0.book Page 67 Monday, July 31, 2006 10:10 AM
Maintenance and care
71
EJU34490Fuel injection system
The fuel injection system was set at the
Yamaha factory. If the fuel injection system
needs to be adjusted, have a Yamaha dealer
service the watercraft.
CAUTION:
ECJ00220
Do not attempt to adjust the fuel injection
system. If the settings are disturbed by
someone who does not have the neces-
sary technical knowledge, poor engine
performance and damage may result.
EJU34500Checking the trolling speed
(1) Place the watercraft in the water.
(2) Start the engine and warm it up. Use the
tachometer in the multifunction informa-
tion center to check the trolling speed.
If the trolling speed is out of specification,
have a Yamaha dealer service the watercraft.
EJU34520Bleeding the oil pump
If the oil tank becomes completely empty, or
any hose connected to the oil pump has been
disconnected, the oil pump must be bled to
ensure proper oil flow.
If necessary, have a Yamaha dealer bleed the
oil pump.
EJU36190Adjusting the Yamaha Adjustable
Sponsons (YAS)
The Yamaha Adjustable Sponsons can be
adjusted to two positions to enhance water-
craft performance according to operator pref-
erence and operating conditions. (See page
33 for an explanation of the positions.)To adjust the YAS:
(1) Remove the bolts on both sponsons.
(2) Remove the sponsons, and then install
them in the desired position.
NOTE:
Be sure to install both sponsons in the same
position.
(3) Tighten the sponson bolts to the specified
torque. Trolling speed:
1350 ±100 r/min
1Bolt
Sponson bolt tightening torque:
18.0 Nm (13.3 ft-lb) (1.84 kgf-m)
UF1G74E0.book Page 71 Monday, July 31, 2006 10:10 AM
Trouble recovery
73
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.
EJU34580Troubleshooting 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
22
Fuse Burned out Replace the fuse and
check wiring78
Battery Run down Recharge 69
Poor terminal con-
nectionsTighten as required
69
Terminal corroded Clean 61
Starter motor Faulty Have serviced by
Yamaha dealer—
Warning sys-
temOverheat mode Cool down engine
29
Engine does not
start (Starter motor
turns over)Throttle lever Squeezed Release 23
Fuel Empty Refill as soon as pos-
sible36
Stale or contaminat-
edHave serviced by
Yamaha dealer66
Fuel tank Water or dirt present Have serviced by
Yamaha dealer66
Spark plug Fouled or defective Clean or replace 67
Spark plug
capNot connected or
looseConnect properly
67
Crankcase Filled with water Crank engine with
plug out until clean79
Fuel injec-
tion systemFuel pump faulty Have serviced by
Yamaha dealer—
Water tem -
perature sen-
sorFailed Have serviced by
Yamaha dealer 29
UF1G74E0.book Page 73 Monday, July 31, 2006 10:10 AM
Trouble recovery
74
Engine runs irregu-
larly or stallsFuel Empty Refill as soon as pos-
sible36
Stale or contaminat-
edHave serviced by
Yamaha dealer66
Fuel tank Water or dirt present Have serviced by
Yamaha dealer66
Spark plug Fouled or defective Replace 67
Incorrect heat range Replace 67
Gap incorrect Adjust 67
Spark plug
capLoose Connect properly 67
Cracked, torn, or
damagedReplace
—
Electrical wir-
ingLoose connection Tighten or connect
properly—
Fuel injec-
tion systemFaulty or clogged in-
jectorsHave serviced by
Yamaha dealer—
Warning light or in-
dicator blinksFuel level Empty Refill as soon as pos-
sible36
Engine oil
levelEmpty Refill immediately 36
Oil filter clogged Have serviced by
Yamaha dealer—
Engine over-
heatedJet intake clogged Clean 76
Water temperature
sensor is failedHave serviced by
Yamaha dealer29
Low battery
voltageBattery voltage low Charge 69
Battery terminal con-
nected wrongConnect properly
69
Exhaust gas
temperatureGas temperature is
too highCool down engine
31
Check engine
warningFaulty sensors Have serviced by
Yamaha dealer31 TROUBLE POSSIBLE CAUSE REMEDY PAGE
UF1G74E0.book Page 74 Monday, July 31, 2006 10:10 AM
Trouble recovery
76
EJU34620
Emergency procedures EJU34630Cleaning the jet intake and impeller
If weeds or debris get caught in the jet intake
or impeller, cavitation can occur, causing jet
thrust to decrease even though engine speed
rises. If this condition is allowed to continue,
the engine will overheat and may seize. If
there is any sign that the jet intake or impeller
is clogged with weeds or debris, return to
shore and check the intake and impeller. Al-
ways stop the engine before beaching the wa-
tercraft.
WARNING
EWJ00780
Before attempting to remove weeds or de-
bris from the jet intake or impeller area,
shut the engine off and remove the clip
from the engine shut-off switch. Severe in-
jury or death could result from coming incontact with the rotating parts of the jet
pump.
CAUTION:
ECJ00650
If weeds or debris get caught in the jet in-
take, do not operate the watercraft above
trolling speed until they have been re-
moved.
(1) Turn the watercraft on its side as shown.
UF1G74E0.book Page 76 Monday, July 31, 2006 10:10 AM
Index
2-stroke engine oil .................................... 36
A
Adjusting the Yamaha Adjustable
Sponsons (YAS) ................................... 71
B
Battery ................................................ 40, 61
Battery, checking...................................... 69
Battery, jumping ....................................... 77
Beaching the watercraft ........................... 57
Bilge ......................................................... 39
Boarding alone ......................................... 51
Boarding and starting from a dock ........... 51
Boarding and starting in deep water ........ 51
Boarding and starting in shallow water .... 50
Boarding with a passenger....................... 52
Bow down................................................. 26
Bow eye ................................................... 26
Bow up ..................................................... 26
Builder’s plate............................................. 2
C
Capsized watercraft ................................. 54
Check engine warning indicator ............... 31
Cleaning the watercraft ............................ 62
Cooling water pilot outlets .................. 23, 44
Cruising limitations ................................... 10
D
Docking the watercraft ............................. 57
E
Emergency procedures ............................ 76
Engine break-in ........................................ 45
Engine compartment ................................ 39
Engine overheat warning indicator ........... 29
Engine serial number ................................. 1
Engine shut-off cord ................................. 44
Engine shut-off switch .............................. 22
Engine stop switch ................................... 22
Enjoy your watercraft responsibly ............ 16
Exhaust temperature warning indicator.... 31
F
Filling the fuel tank ................................... 36
Filling the oil tank ..................................... 36
Fire extinguisher....................................... 41
Flushing the cooling system ..................... 60
Front storage compartment ...................... 32Fuel and oil............................................... 35
Fuel and oil systems ................................ 39
Fuel injection system ................................ 71
Fuel level meter ........................................ 28
Fuel level warning indicator ...................... 29
Fuel system .............................................. 61
Fuel system, checking .............................. 66
Fuel tank .................................................. 66
Fuel tank filler cap .................................... 22
Fuses, replacing ....................................... 78
G
Gasohol .................................................... 35
Gasoline ................................................... 35
Getting to know your watercraft ............... 48
Glove compartment .................................. 33
H
Handgrip ................................................... 26
Hazard information ................................... 14
Hood ......................................................... 21
Hour meter/voltmeter ............................... 28
Hull and deck ........................................... 39
Hull Identification Number (HIN)................. 1
I
Identification numbers ................................ 1
Important labels .......................................... 3
J
Jet intake .................................................. 43
Jet intake and impeller, cleaning .............. 76
Jet thrust nozzle angle, checking ............. 66
Jumper cables, connecting ...................... 77
L
Labels, other .............................................. 7
Labels, warning .......................................... 4
Launching the watercraft .......................... 46
Learning to operate your watercraft ......... 48
Leaving the watercraft .............................. 48
Limitations on who may operate the
watercraft ................................................ 9
Lubrication................................................ 61
Lubrication points ..................................... 68
M
Main components, location of .................. 17
Maintenance and adjustments ................. 63
Model information....................................... 2
Multifunction information center ......... 27, 44
UF1G74E0.book Page 1 Monday, July 31, 2006 10:10 AM
Index
O
Oil filter ..................................................... 66
Oil injection system, checking .................. 66
Oil level warning indicator ........................ 29
Oil pump, bleeding ................................... 71
Oil tank ..................................................... 66
Oil tank filler cap....................................... 22
Operating your watercraft......................... 48
Operation ................................................. 45
Operation of controls and other
functions ............................................... 21
Operation requirements ........................... 11
Owner’s/operator’s manual and tool kit .... 63
P
Periodic maintenance chart...................... 65
Post-operation care .................................. 58
Pre-operation check list............................ 38
Pre-operation check points ...................... 39
Pre-operation checks ............................... 38
Primary Identification (PRI-ID) number ...... 1
Q
Quick Shift Trim System (QSTS) ............. 42
Quick Shift Trim System (QSTS)
selector ................................................. 25
R
Recommended equipment ....................... 13
Riding with a passenger ........................... 49
Rough water operation ............................. 57
S
Safe boating rules .................................... 15
Seat .......................................................... 21
Spark plugs, cleaning and adjusting ........ 67
Speedometer............................................ 28
Start switch............................................... 23
Starting the engine ................................... 46
Starting the watercraft .............................. 50
Steering system ................................. 24, 42
Stern drain plugs ...................................... 40
Stern rope holes ....................................... 27
Stopping the engine ................................. 48
Stopping the watercraft ............................ 56
Storage..................................................... 60
Storage compartments ............................. 32
Submerged watercraft .............................. 79
Switches ................................................... 44T
Tachometer .............................................. 28
Throttle cable, checking and adjusting ..... 67
Throttle lever ...................................... 23, 42
Towing the watercraft ............................... 78
Transporting ............................................. 59
Trolling speed, checking .......................... 71
Troubleshooting ....................................... 73
Troubleshooting chart .............................. 73
Turning the watercraft .............................. 55
W
Water separator ....................................... 39
Watercraft characteristics ......................... 14
Y
Yamaha Adjustable Sponsons (YAS) ...... 33
Yamaha Engine Management
System (YEMS) .................................... 27
UF1G74E0.book Page 2 Monday, July 31, 2006 10:10 AM