2021 YAMAHA GP800R engine

2-7
E
EJU00704
Fuel cock knob
The fuel cock supplies fuel from the fuel
tank to the carburetors.
The fuel cock knob 1 positions are
explained as follows and are shown in the
illustration.
OFF:
With the fuel cock knob in this position,
fuel does not flow. Always turn the fuel cock
knob to this position when the engine is not
running.
ON:
With the fuel cock knob in this position,
fuel flows to the carburetors. Turn the fuel
cock knob to this position when starting the
engine and operating the watercraft.
RES:
This indicates reserve. With the fuel cock
knob in this position, the fuel reserve is
made available. Tur n the fuel cock knob to
this position if you run out of fuel while oper-
ating the watercraft. When this occurs,
refuel as soon as possible and be sure to
turn the fuel cock knob back to “ON”!

2-8
E
EJU00705
Engine stop switch
Push this switch 1 (red button) to stop
the engine normally.
EJU00706
Engine shut-off switch
Insert the clip 1, on the end of the engine
shut-off cord 2, under the engine shut-off
switch 3 (black button). The engine will stop
automatically when the clip is removed from
the switch, such as if the operator falls off
the watercraft.
WARNING
●Always attach the engine shut-off cord
to your wrist and the clip to the engine
shut-off switch BEFORE starting the
engine.
●To prevent accidental starting of the
engine or unauthorized use by chil-
dren or others, always remove the clip
from the shut-off switch when the
engine is not running.
EJU00350
Choke lever
Starting a cold engine requires a richer
air-fuel mixture, which is supplied by the
choke.
Move the lever 1 in direction a to turn
the choke on.
Move the lever in direction b to turn the
choke off.

2-9
E
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
E
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.