2021 YAMAHA GP800R service

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Page 80 of 119

YAMAHA GP800R 2021  Owners Manual 4-1
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Storage
WARNING
Always place the fuel cock knob in the
“OFF” position when storing the water-
craft, otherwise fuel could leak out into
the engine or engine compartment,
which woul

Page 86 of 119

YAMAHA GP800R 2021  Owners Manual 4-7
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Maintenance and 
adjustments
Periodic inspection, adjustment and lubri-
cation will keep your watercraft in the safest
and most efficient condition possible. Safety
is an obligation of

Page 87 of 119

YAMAHA GP800R 2021  Owners Manual 4-8
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Owner’s/Operator’s Manual 
and tool kit
It is advisable always to carry the Owner’s/
Operator’s Manual and tool kit 2 with you
whenever you use the watercraft. For your
convenience, a st

Page 90 of 119

YAMAHA GP800R 2021  Owners Manual 4-11
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Fuel filter
This watercraft is equipped with a one-
piece, disposable fuel filter 1. The fuel filter
should be replaced once a year or after
every 200 hours of operation, or if water i

Page 91 of 119

YAMAHA GP800R 2021  Owners Manual 4-12
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Inspecting the oil injection 
system
Check the oil injection system for leakage,
cracks, or malfunctions. If necessary, have a
Yamaha dealer repair the oil injection sys-
tem.
Check:

Page 92 of 119

YAMAHA GP800R 2021  Owners Manual 4-13
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Inspecting the steering cable
Check for smooth operation of the handle-
bars and jet thrust nozzle.
Turn the handlebars as far as possible to
the right and left and check that the d

Page 93 of 119

YAMAHA GP800R 2021  Owners Manual 4-14
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Inspecting the QSTS 
mechanism
Check that the shift lock lever moves back
to the lock position smoothly, that the QSTS
selector locks and unlocks properly, and that
the jet thrust nozz

Page 94 of 119

YAMAHA GP800R 2021  Owners Manual 4-15
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Cleaning and adjusting the 
spark plugs
The spark plug is an important engine
component and is easy to inspect. The con-
dition of the spark plug can indicate some-
thing about the co
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