Features and functions
27
The bow eye is used to attach a rope to the
watercraft when transporting, mooring, or
towing it in an emergency.
EJU36020Stern rope holes
The stern rope holes are located at the stern
of the watercraft.
The stern rope holes are used to attach a rope
to the watercraft when transporting or moor-
ing it.
EJU31370Yamaha Engine Management System
(YEMS)
This model is equipped with an integrated,
computerized management system that con-
trols and adjusts ignition timing, fuel injection,
engine diagnostics, and the off-throttle steer-
ing (OTS) system.
EJU31420Multifunction information center
This meter contains the following functions for
help and convenience in operating the water-
craft.
CAUTION:
ECJ00060
Do not run the engine over 4000 r/min
when checking the operation of the
meter on land without supplying water,
otherwise the engine could overheat
and the catalytic converter could be se-
riously damaged.
Use the specified resistor-type spark
plugs and caps, otherwise the meter
may function erratically.
NOTE:
When the engine is started, all displays light
up for a few seconds, the buzzer sounds
twice, and then the meter starts to operate
normally.
1Bow eye
1Stern rope hole
1Tachometer
2Speedometer
3Hour meter/voltmeter
4Fuel level meter
5“WARNING” light
6Fuel level warning indicator
7Oil level warning indicator
8Engine overheat warning indicator
9Exhaust temperature warning indicator
10Check engine warning indicator
11Select button
UF1G74E0.book Page 27 Monday, July 31, 2006 10:10 AM
Features and functions
29
The meter shows the hours of engine opera-
tion that have elapsed since the watercraft
was new.
Voltmeter
The voltmeter is provided to display the volt-
age of the battery.
The voltmeter displays 12 volts or more when
the battery voltage is within specification.
If the voltage displayed is low, return to shore
and, if necessary, have a Yamaha dealer
check the charging system and the battery.
EJU31560Fuel level warning indicator
If the fuel remaining in the fuel tank drops to
about 13 L (3.4 US gal, 2.9 Imp gal), the low-
est two fuel level segments, the fuel level
warning indicator, and the “WARNING” light
begin to blink. The buzzer also starts sound-
ing intermittently.
If this occurs, refill the fuel tank as soon as
possible.
The warning signals will be cleared when the
engine is restarted after the fuel tank is re-
filled.
EJU31570Oil level warning indicator
If the oil remaining in the oil tank drops to
about 1.7 L (0.45 US gal, 0.37 Imp gal) or the
oil filter is clogged, the oil level warning indica-
tor and the “WARNING” light begin to blink.The buzzer also starts sounding intermittent-
ly.
If this occurs, refill the oil tank as soon as pos-
sible.
The warning signals will be cleared when the
engine is restarted after the oil tank is refilled.
NOTE:
If the oil level warning indicator and the
“WARNING” light blink when there is ade-
quate oil in the oil tank, have a Yamaha dealer
check the oil filter for dirt and clogs.
EJU31580Engine overheat warning indicator
This model is equipped with an engine over-
heat warning system.
If the engine starts to overheat, the “WARN-
ING” light and the engine overheat warning in-
dicator begin to blink, and the buzzer sounds
intermittently.
If this occurs, reduce the engine speed, return
to shore, and then check for water discharge
UF1G74E0.book Page 29 Monday, July 31, 2006 10:10 AM
Features and functions
30
at the cooling water pilot outlet while the en-
gine is running. If there is no discharge of wa-
ter, shut the engine off, and then check the
intake grate and impeller for clogging.
WARNING
EWJ00050
Before attempting to remove weeds or de-
bris from the intake grate or impeller, shut
the engine off and remove the clip from the
engine shut-off switch. Severe injury ordeath could result from coming in contact
with the rotating parts of the jet pump.
CAUTION:
ECJ00800
This watercraft is equipped with a catalytic
converter.
If the “WARNING” light, engine overheat
warning indicator, and buzzer come on,
reduce the engine speed and return to
shore. If you ignore these signals, the
engine will stop running and cannot be
restarted until the exhaust system cools
down.
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.
If the overheat warning is ignored, engine and
exhaust system heat may increase, particu-
larly if the watercraft is operated at higher
UF1G74E0.book Page 30 Monday, July 31, 2006 10:10 AM
Features and functions
31
speeds. If this occurs, the “WARNING” light
and the engine overheat warning indicator
come on and the buzzer sounds continuously.
In addition, the warning system will cut the ig-
nition to the engine to reduce the risk of se-
vere overheating. The engine cannot be
started until it cools down, so it may be neces-
sary to have the watercraft towed back to the
shore. (See “Towing the watercraft” on page
78 for towing procedures.)
The warning signals will be cleared when the
engine is restarted after it has cooled down.
NOTE:
If multiple warnings occur at the same time,
their priority is as follows:
(1) Final engine overheat warning
(2) Fuel level warning
(3) Oil level warning
(4) Initial engine overheat warning
(5) Exhaust temperature warning
(6) Check engine warning
EJU31610Exhaust temperature warning indicator
This model is equipped with an exhaust tem-
perature warning system.
If the exhaust temperature becomes too hot,
the “WARNING” light and the exhaust tem-
perature warning indicator begin to blink, and
the buzzer sounds intermittently.If this occurs, reduce the engine speed and
return to shore to allow the exhaust system to
cool down.
WARNING
EWJ00830
Do not touch the hot muffler or catalytic
converter during or immediately after en-
gine operation; they can cause serious
burns. In addition, the catalytic converter
becomes hotter after the engine stops be-
fore cooling down.
CAUTION:
ECJ00810
This model is equipped with a catalytic
converter.
If the “WARNING” light, exhaust temper-
ature warning indicator, and buzzer
come on, reduce the engine speed (be-
low 4000 r/min) and return to shore.
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.
The warning signals will be cleared when the
engine is restarted after it has cooled down.
EJU31630Check engine warning indicator
If a sensor malfunction or a short circuit is de-
tected, the “WARNING” light and the check
UF1G74E0.book Page 31 Monday, July 31, 2006 10:10 AM
Operation
35
EJU31800
Fuel and oil
This engine uses Yamaha’s oil injection sys-
tem, which provides superior lubrication by
ensuring the proper fuel-to-oil ratio for all op-
erating conditions. No fuel premixing is nec-
essary, except during the engine break-in
period. Simply pour gasoline into the fuel tank
and oil into the oil tank.
The engine utilizes an electronic fuel injection
system to deliver the optimal air-fuel ratio re-
quired by the engine. By ensuring the optimal
combustion conditions, this system is able to
increase startability and improve fuel econo-
my.
EJU31850Gasoline
WARNING
EWJ00440
GASOLINE AND ITS VAPORS ARE HIGH-
LY FLAMMABLE AND EXPLOSIVE!
Do not smoke when refueling, and keep
away from sparks, flames, and other
sources of ignition.
Stop the engine before refueling.
Refuel in a well-ventilated area with the
watercraft in a horizontal position.
Do not stand or sit on the watercraft
while refueling in case of fire.
Take care not to spill gasoline. If gaso-
line spills, wipe it up immediately with
dry rags. Always properly dispose of
gasoline-soaked rags.
Avoid overfilling the fuel tank. Stop fill-
ing when the fuel level just reaches the
bottom of the filler tube. Do not fill up the
filler tube because fuel expands as it
warms up and could overflow. If tempo-
rarily leaving the watercraft with a full
fuel tank, do not leave it in direct sun-
light. Leave it in a well-ventilated areawith the watercraft in a horizontal posi-
tion.
Tighten the fuel tank filler cap securely
after refueling.
If you should swallow some gasoline, in-
hale a lot of gasoline vapor, or get gaso-
line in your eyes, get immediate medical
attention.
If any gasoline spills on your skin or
clothing, immediately wash the affected
area with soap and water and change
your clothes.
CAUTION:
ECJ00320
Do not use leaded gasoline. Leaded gas-
oline can seriously damage the catalytic
converter.
Use only fresh gasoline that has been
stored in clean containers.
EJU31860Gasohol
There are two types of gasohol: gasohol con-
taining ethanol and that containing methanol.
Gasohol containing ethanol can be used if
ethanol content does not exceed 10% and the
fuel meets the minimum octane ratings.
Gasohol containing methanol is not recom-
mended by Yamaha because it can cause
fuel system damage and engine performance
problems.Recommended gasoline:
Regular unleaded gasoline with a mini-
mum octane rating of
86 (Pump octane number) = (R +
M)/2
90 (Research octane number)
UF1G74E0.book Page 35 Monday, July 31, 2006 10:10 AM
Operation
49
and other watercraft. Select a wide area to
learn in, where there is good visibility and light
boat traffic.
Use the buddy system—operate with some-
one nearby. Scan constantly for people, ob-
jects, and other watercraft. Be alert for
conditions that limit your visibility or block your
vision of others.
Attach the engine shut-off cord to your left
wrist and keep it free from the handlebars so
that the engine stops if you, the operator, fall
off.
Wear a personal flotation device (PFD). All
riders must wear a PFD that is approved by
the appropriate authorities and is suitable for
personal watercraft use.
Wear protective clothing. Severe internal inju-
ries can occur if water is forced into body cav-
ities as a result of falling into the water or
being near the jet thrust nozzle. Normal swim-
wear does not adequately protect against
forceful water entry into the rectum and vagi-
na. All riders must wear a wetsuit bottom or
clothing that provides equivalent protection.
Such clothing includes thick, tightly woven,
sturdy and snug-fitting apparel such as den-
im, but does not include spandex or similar
fabrics, like those used in bicycle shorts. A full
wetsuit can also protect against hypothermia
(subnormal body temperature) and abra-
sions.Footwear and gloves are recommended.
Eye protection is recommended to keep wind,
water, and glare from the sun out of your eyes
while you operate your watercraft. Restraining
straps for eyewear are made which are de-
signed to float should your eyewear fall in the
water.
You should grip the handlebars firmly and
keep both feet on the floor of the footwell. Do
not attempt to ride with a passenger until your
operating skills are fully developed.
EJU33020Riding with a passenger
When a passenger is on board with the oper-
ator, the watercraft handles differently, and is
not as easy to maneuver, so operating it re-
quires a higher degree of skill. Before at-
tempting to operate the watercraft with a
passenger on board, the operator must prac-
tice operating the watercraft alone enough to
be able to acquire the necessary skills.
The passenger must always wear a PFD that
is approved by the appropriate authorities and
a wetsuit bottom or equivalent.
WARNING
EWJ00520
Do not apply throttle when anyone is at the
rear of the watercraft. Turn the engine off
or keep it at idle. Water and/or debris exit-
ing the jet thrust nozzle can cause severe
injury. The passenger should not attempt
to board the watercraft if the operator is
applying throttle.
Do not give a ride to a child whose feet cannot
reach the floor of the footwell. The passenger
should hold on firmly to the operator and keep
both feet on the floor of the footwell. Never al-
low a passenger to ride in front of the opera-
tor.
UF1G74E0.book Page 49 Monday, July 31, 2006 10:10 AM
Maintenance and care
61
EJU33580Lubrication
WARNING
EWJ00260
Do not spray flammable rust inhibitor
products on engine surfaces while the en-
gine is hot. The sprayed substance or pro-
pellants could catch fire.
(1) Remove the spark plugs and pour ap-
proximately one tablespoon of engine oil
into each cylinder.
(2) Grease the spark plug threads and rein-
stall the spark plugs.
(3) With the spark plug caps removed from
the spark plugs, crank the engine for 3
seconds or less using the start switch.
(4) Lubricate all cables such as the throttle
and steering cables.
NOTE:
Use a suitable marine grease applicator to
pressure-lubricate the cables and purge out
any moisture between the inner and outer ca-
bles.
(5) Lubricate the areas of the watercraft
specified in “Lubrication points” on page
68.
EJU33651Fuel system
WARNING
EWJ00290
GASOLINE AND ITS VAPORS ARE HIGH-
LY FLAMMABLE AND EXPLOSIVE!
Do not smoke when refueling, and keep
away from sparks, flames, and other
sources of ignition.
Stop the engine before refueling.
Refuel in a well-ventilated area with the
watercraft in a horizontal position.
Do not stand or sit on the watercraft
while refueling in case of fire.
Take care not to spill gasoline. If gaso-
line spills, wipe it up immediately with
dry rags. Always properly dispose of
gasoline-soaked rags.
Avoid overfilling the fuel tank. Stop fill-
ing when the fuel level just reaches the
bottom of the filler tube. Do not fill up the
filler tube because fuel expands as it
warms up and could overflow. If tempo-
rarily leaving the watercraft with a full
fuel tank, do not leave it in direct sun-
light. Leave it in a well-ventilated area
with the watercraft in a horizontal posi-
tion.
Tighten the fuel tank filler cap securely
after refueling.
If you should swallow some gasoline, in-
hale a lot of gasoline vapor, or get gaso-
line in your eyes, get immediate medical
attention.
If any gasoline spills on your skin or
clothing, immediately wash the affected
area with soap and water and change
your clothes.
Top off the fuel tank with fresh gasoline and
add 470 ml (15.9 US oz, 16.5 Imp oz) of
Yamaha Fuel Stabilizer and Conditioner.
CAUTION:
ECJ00140
Use only Yamaha Fuel Stabilizer and Con-
ditioner, otherwise the catalytic converter
could be seriously damaged.
EJU33680Battery
If the watercraft will not be used for more than
a month, remove the battery from the water-
craft and store it in a cool, dry place.
(1) Disconnect the negative (–) battery lead
first, then the positive (+) battery lead and
breather hose, and then remove the bat-
tery from the watercraft.
UF1G74E0.book Page 61 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