engine YAMAHA GP800R 2021 User Guide

2-9
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EJU00351
Throttle lever
Squeeze the throttle lever 1 to increase
engine speed.
Release the throttle lever to decrease
engine speed or to return it to the idle posi-
tion.
EJU00353
Start switch
Push the start switch 1 (green button) to
start the engine.
NOTE:
The engine will not start when the clip is
removed from the engine shut-off switch.

2-10
E
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.
EJU00356
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.

2-11
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EJU00360a
Quick Shift Trim System
(QSTS) selector
The QSTS selector 1 is located at the
left handlebar grip and is used to adjust the
trim angle of the watercraft.
Operating the QSTS selector changes the
angle of the jet thrust nozzle vertically. This
changes the trim angle of the watercraft.
There are 5 positions: 2 bow down posi-
tionsA and B, neutral “N,” and 2 bow up
positionsC and D.
To change the trim angle:
1. Reduce engine speed to 3,000 r/min or
less.
2. Squeeze the shift lock lever 2, and then
turn the QSTS selector to the desired
position.
3. Release the shift lock lever to lock the
QSTS selector.
CAUTION:
Do not turn the QSTS selector while
operating the watercraft at full throttle,
otherwise damage could occur to the
QSTS.
The neutral “N” position will provide good
performance for most operating conditions.
To enhance particular types of perfor-
mance, select bow down or bow up.

2-13
E
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.

2-15
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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.

2-16
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F0X0230
RESET
4
3
2
1
EJU00383
Tachometer
The engine speed (r/min) is displayed by
segments. Each segment indicates a 250 r/min
increment.
EJU00384a
Speedometer
The meter shows the watercraft speed
against water.
NOTE:
If the speedometer malfunctions, “_ _” dis-
play will blink.
Reset button
Pushing the reset button stops sounding
the buzzer.

2-17
E
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.

2-18
E
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.

2-19
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EJU00672a
Storage compartments
A front storage compartment and a glove
compartment are provided.
NOTE:
●Make sure that the storage compartments
are properly secured before operating the
watercraft.
●The storage compartments are not
designed to be waterproof. If you carry
objects that must be kept dry, such as the
manuals, put them in a waterproof bag.
Front storage compartment
The front storage compartment 2 is
located at the bow.
To open the front storage compartment,
push the hood latch 1 down, and then open
the hood.
NOTE:
The front storage compartment can be
removed to access the engine compart-
ment.
Front storage compartment:
Capacity: 16 L (4.2 US gal, 3.5 Imp gal)
Load limit: 5 kg (11 lb)
To close the front storage compartment,
push down on the rear of the hood until it
latches securely.

E
3
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