2021 YAMAHA GP800R check engine

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●Do not attempt to modify this watercraft!
Modifications to your watercraft may
reduce safety and reliability, and render
the watercraft unsafe or illegal for use.
●Attach the engine shut-off cord (lanyard)
to wrist and keep it free from the handle-
bars so that the engine stops if the opera-
tor falls off. After riding, remove the
engine shut-off cord from the watercraft to
avoid accidental starting or unauthorized
use by children or others.
●Scan carefully for swimmers and stay
away from swimming areas. Swimmers
are hard to see and you could acciden-
tally hit someone in the water.
●Avoid being hit by another boat! You
should always take the responsibility to
watch for traffic; other boaters may not be
watching for you. If they do not see you,
or you maneuver more quickly than other
boaters expect, you risk a collision.
●Maintain a safe distance from other boats
or watercraft, and also watch for boats’ ski
ropes or fishing lines. Obey the “Safe
boating rules” and be sure to check
behind you before making a turn. (See
Safe boating rules on page 1-14.)
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Hazard information
●When transporting or storing your water-
craft, always place the fuel cock knob in
the “OFF” position, otherwise gasoline
may overflow from the carburetor.
●Never start the engine or let it run for any
length of time in an enclosed area.
Exhaust fumes contain carbon monoxide,
a colorless, odorless gas that may cause
loss of consciousness and death within a
short time. Always operate the watercraft
in an open area.

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1Engine shut-off cord (lanyard)
Attach to wrist so that the engine stops if the
operator falls off the watercraft.
2Engine stop switch
Push to stop the engine normally.
3Clip
Insert into the engine shut-off switch to enable
starting of the engine.
Remove to stop the engine or prevent acci-
dental star ting of the engine or unauthorized
use of the watercraft.
4Quick Shift Trim System (QSTS) selector
Use to select the trim angle of the watercraft.
5Engine shut-off switch
Remove the clip to stop the engine and dis-
able it from starting.
6Start switch
Push to start the engine.
7Multifunction information center
Use to check watercraft operation.8Throttle lever
Use to accelerate and decelerate.
9Choke lever
0Oil tank filler cap
AFuel cock knob
BStern drain plugs
Use to drain water in the bilge when the water-
craft is on dry land.
CJet thrust nozzle
Changes the direction of jet thrust according
to handlebar position.
DRide plate

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EJU00354
Cooling water pilot outlet
This watercraft is equipped with a cooling
water pilot outlets.
When the engine is running, cooling
water is circulated in the engine, and then it
is discharged from the pilot outlets.
To check for proper operation of the cool-
ing system, check that water is being dis-
charged from the pilot outlets. If water is not
being discharged from the outlets, cooling
water may not be circulating in the engine.
When this occurs, stop the engine and check
for the cause. (See pages 2-13 and 5-4 for
further instructions.)
NOTE:
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.
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Steering system
Your watercraft can be steered by turning
the handlebars 1 the same direction you
wish to travel.
When the handlebars are turned, the
angle of the jet thrust nozzle 2 is changed,
and the direction of the watercraft is
changed accordingly. Since the strength of
the jet thrust determines the speed and
direction of a turn, the throttle must always
be open when attempting a turn, except at
trolling speed.

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EJU00366
Engine overheat warning
system
This model is equipped with an engine
overheat warning system.
If the engine starts to overheat, the warn-
ing light and the engine overheat warning
indicator begin to blink, the buzzer sounds,
and the engine speed will be limited to about
3,400 r/min.
When this occurs, check for water dis-
charge at the cooling water pilot outlet. If
there is no discharge of water, reduce the
engine speed and beach the watercraft, and
then check the intake grate and impeller for
clogging.
WARNING
Before attempting to remove weeds or
debris from the intake grate or impeller,
shut the engine off and remove the clip
from the engine shut-off switch. Severe
injury or death could result from coming
in contact with the rotating parts of the
jet pump.
CAUTION:
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
engine damage.
NOTE:
Press the reset button on the multifunction
information center to stop the buzzer.

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EJU00698a
Multifunction information
center
This meter contains following functions for
the help and convenience of operation.
1
Tachometer
2
Speedometer
3
Fuel meter
4
Hour meter
5
Warning light
6
Oil warning indicator
7
Engine overheat warning indicator
8
Fuel warning indicator
9
Reset button
CAUTION:
●Do not run the engine at full throttle or
more than 15 seconds to check the
meter for operation on land. The
engine could overheat.
●Use the specified resistor-type spark
plug and cap, otherwise the meter may
function erratically.
NOTE:
All display light up and the buzzer sounds
twice after the engine starts. Then, the
meter will operate normally after few sec-
onds. The current display will continue to
operate for 30 seconds after the engine
stops.

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EJU00386a
Fuel meter
The fuel meter is provided for convenient
fuel level checking while riding. The fuel
meter has eight segments which show the
amount of fuel remaining in the fuel tank.
NOTE:
The indication of the segments differs on
your operating condition. Use the meter as a
reference.
EJU00390a
Hour meter
The hour meter is provided to make it
easy to follow the maintenance schedule.
The meter shows the hours of engine opera-
tion that have elapsed since the watercraft
was new.
NOTE:
●The elapsed time will be kept even if the
battery terminals have been discon-
nected.
●If the hour meter malfunctions, “____”
display and the warning light will blink.

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EJU00716a
Fuel warning indicator
If the fuel remaining in the tank drops to
about 13 L (3.4 US gal, 2.9 lmp gal), the
lowest two fuel level segments, the fuel
warning indicator and the warning light
begin to blink. The buzzer also starts sound-
ing intermittently.
The warning signals will be cleared when
the engine restarts after refilling fuel.
EJU00717a
Oil warning indicator
If the oil remaining in the tank drops to
about 1.7 L (0.45 US gal, 0.37 lmp gal) or
the oil filter is clogged, the oil warning indi-
cator and the warning light begin to blink.
The buzzer also starts sounding intermit-
tently.
If the oil warning indicators begin to blink,
refill with engine oil as soon as possible.
The warning signals will be cleared when
the engine restarts after refilling engine oil.
NOTE:
If the warning indicators blink with adequate
oil in the tank, check the oil filter for clog-
ging.
EJU00718a
Engine overheat warning
indicator
If the engine starts to overheat, the
engine overheat warning indicator and the
warning light begin to blink. The buzzer also
starts sounding.

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EJU00410
OPERATION
Fuel and oil................................................ 3-1
Gasoline .................................................. 3-1
Filling the fuel tank .................................. 3-3
2-stroke engine oil................................... 3-4
Filling the oil tank .................................... 3-4
Pre-operation checks............................... 3-5
Pre-operation check list .......................... 3-5
Pre-operation check points..................... 3-6
Operation................................................. 3-13
Engine break-in ..................................... 3-13
Starting the engine................................ 3-15
Stopping the engine.............................. 3-18
Leaving the watercraft .......................... 3-18
Operating your watercraft..................... 3-19
Getting to know your watercraft............ 3-19
Learning to operate your watercraft ..... 3-19
Riding watercraft with a passenger ...... 3-20
Starting the watercraft........................... 3-21
Boarding and starting in deep water .... 3-23
Capsized watercraft .............................. 3-25
Turning the watercraft........................... 3-27
Stopping the watercraft......................... 3-29
Beaching the watercraft ........................ 3-30
Docking the watercraft .......................... 3-30
Rough water operation ......................... 3-30
Post-operation checks.......................... 3-31
Transporting........................................... 3-33