battery YAMAHA GP800R 2021 User Guide

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To replenish the battery:
1. Make sure that the electrolyte level is
between the upper 1 and lower 2 level
marks.
2. Refill the battery with distilled water if
necessary.
CAUTION:
Normal tap water contains minerals that
are harmful to a battery. Use only dis-
tilled water for replenishing the battery.
To recharge the battery:
CAUTION:
Do not attempt to charge a battery hast-
ily. Battery life may be shorter.
Yamaha recommend charging battery by
a Yamaha dealer or a battery dealer. If you
charge the battery yourself, read the battery
charger instructions carefully before charg-
ing and follow the points below.
1. Remove all caps from the battery cell.
2. Add distilled water to the specified level if
the electrolyte level is low.
3. Set the charging rate to 1.9 ampere and
charge the battery slowly until the explo-
sive gases become coming out vigor-
ously from battery cells.
To connect the battery terminals:
1. Make sure that the connections are correct
when you insert the battery in the watercraft.
2. Make sure that the breather hose is
properly connected and that it is not
damaged or obstructed.
3. Make sure that the battery is securely
held in place.
1Positive (+): Red lead
2Negative (–): Black lead
3Breather hose

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EJU00588
Specifications
MODEL
ITEMUnit GP800R
WATERCRAFT CAPACITY
Maximum people on board Number of people 2
Maximum load capacity kg (lb) 160 (353)
DIMENSIONS
Length mm (in) 2,930 (115.4)
Width mm (in) 1,150 (45.3)
Height mm (in) 1,020 (40.2)
Dry weight kg (lb) 268 (591)
PERFORMANCE
Maximum output kW (PS) @ r/min 88.2 (120)@ 7,000
Maximum fuel consumption L/h (US gal/h, Imp gal/h) 49.0 (12.9, 10.8)
Cruising range at full throttle hr. 1.2
Trolling speed r/min 1,250–1,350
ENGINE
Engine type 2-stroke
Number of cylinders 2
Engine displacement
cm
3 (cu in)784 (47.8)
Bore & stroke mm (in) 80.0 ×
78.0 (3.15 ×
3.07)
Compression ratio 6.6:1
Lubrication system Variable oil injection
Cooling system Water cooled
Starting system Electric starter
Ignition system Digital CDI
Spark plug BR8ES (NGK)
Spark plug gap mm (in) 0.7–0.8 (0.028–0.031)
Battery capacity V-AH 12-19
Charging system Flywheel magneto
DRIVE UNIT
Propulsion system Jet pump
Jet pump type Axial flow, single stage
Impeller rotation Counterclockwise (viewed from rear)
Transmission Direct drive from engine
Jet thrust nozzle angle Degree 23 + 23
Trim nozzle angle Degree -5, 0, 5, 10, 15
FUEL AND OIL
Recommended fuel Regular unleaded gasoline
Minimum octane rating PON
RON86
90
Recommended engine oil YAMALUBE 2-W, or an equivalent NMMA-
certified TC-W3 marine oil
Fuel tank capacity
Total L (US gal, Imp gal) 60 (15.9, 13.2)
Reserve L (US gal, Imp gal) 10 (2.6, 2.2)
Oil tank capacity L (US gal, Imp gal) 5.5 (1.45, 1.21)

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5
EJU00594
TROUBLESHOOTING
AND EMERGENCY
PROCEDURES
Troubleshooting....................................... 5-1
Troubleshooting chart ............................. 5-1
Emergency procedures........................... 5-4
Cleaning the jet intake and impeller ....... 5-4
Jumping the battery ................................ 5-5
Towing the watercraft ............................. 5-7
Submerged watercraft ............................ 5-8

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EJU00595
Troubleshooting
If you have any trouble with your watercraft, use this section to check for the possible
cause.
If you cannot find the cause, or if the procedure for replacement or repair is not described
in this Owner’s/Operator’s Manual, have a Yamaha dealer perform the necessary service.
EJU00596a
Troubleshooting chart
TROUBLE POSSIBLE CAUSE REMEDY PAGE
Engine does not
startStarter motor does not turn over
Engine shut-
off switchClip not in place Install clip
2-8
Fuse Burned out Replace the fuse and
check wiring4-22
Battery Run down Recharge 4-19
Poor terminal connec-
tionsTighten as required
4-19
Terminal corroded Clean 4-5
Starter motor Faulty Have serviced by
Yamaha dealer—
Starter motor turns over
Fuel cock Turned to “OFF” Turn the fuel cock to
“ON”2-7
Fuel Empty Refill as soon as possi-
ble3-3
Stale or contaminated Have serviced by
Yamaha dealer4-10
Fuel tank Water or dirt present Have serviced by
Yamaha dealer4-11
Spark plug Fouled or defective Clean or replace 4-15
Spark plug cap Not connected or loose Connect properly 4-15
Crankcase Filled with water Crank engine with plug
out until clean5-8
Fuel filter Clogged or water
pooledHave serviced by
Yamaha dealer4-11
Choke Choke valve can not be
closed surely by lever
operationHave serviced by
Yamaha dealer —

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Engine runs irregu-
larly or stallsFuel Empty Refill as soon as possi-
ble3-3
Stale or contaminated Have serviced by
Yamaha dealer4-10
Choke Lever is moved to on Move back to original
position2-8
Fuel filter Clogged or water
pooledHave serviced by
Yamaha dealer4-11
Fuel tank Water or dirt present Have serviced by
Yamaha dealer4-11
Spark plug Fouled or defective Replace 4-15
Incorrect heat range Replace 4-15
Gap incorrect Adjust 4-15
Spark plug cap Loose Connect properly 4-15
Cracked, torn, or dam-
agedHave serviced by
Yamaha dealer—
Electrical wir-
ingLoose connection Tighten or connect
properly—
Carburetor Incorrect idle adjust-
mentAdjust idle
4-21
Clogged Have serviced by
Yamaha dealer—
Warning light or
indicator blinksFuel level Empty Refill as soon as possi-
ble3-3
Engine oil level Empty Refill immediately 3-4
Oil filter clogged Clean 4-12
Engine over-
heatedJet intake clogged Clean
5-4
Low battery
voltageBattery voltage low Charge 4-19
Battery terminal con-
nected wrongConnect properly
4-19 TROUBLE POSSIBLE CAUSE REMEDY PAGE

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2. Remove any weeds or debris from
around the drive shaft, impeller, pump
housing, and jet thrust nozzle.
If debris is difficult to remove, consult
your Yamaha dealer.
CAUTION:
Always avoid operating your watercraft in
areas where weed growth is thick. If trav-
eling in weeded areas is unavoidable,
operate the engine alternately at partial
throttle and full throttle. Weeds tend to
accumulate more at a steady speed and
at trolling speed. If weeds clog the intake
or impeller area and cause cavitation, fol-
low the cleaning procedure above.
EJU00599
Jumping the battery
If the watercraft battery has run down, the
engine can be started using a 12-volt bat-
tery and jumper cables.
WARNING
Battery electrolyte is poisonous and dan-
gerous, causing severe burns, etc. Elec-
trolyte contains sulfuric acid. Avoid
contact with skin, eyes or clothing.
Antidotes
External: Flush with water.
Internal: Drink large quantities of water
or milk. Follow with milk of magnesia,
beaten egg or vegetable oil. Call physi-
cian immediately.
Eyes: Flush with water for 15 minutes
and get prompt medical attention.
Batteries give off explosive gases. Keep
sparks, flame, cigarettes, etc. well away.
If using or charging the battery in an
enclosed area, make sure that it is well
ventilated. Always shield your eyes when
working near batteries.
KEEP OUT OF THE REACH OF CHILDREN.

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EJU00600
Connecting the jumper cables
1. Connect the positive (+) jumper cable 1
to the positive (+) terminals of both bat-
teries.
2. Connect one end of the negative (–)
jumper cable 2 to the negative (–) termi-
nal of the booster battery 3.
3. Connect the other end of the negative (–)
cable to an unpainted bolt on the cylinder
head.
CAUTION:
Do not connect the end of the jumper
cable to the negative (–) terminal on the
watercraft battery! Be sure all connec-
tions are secure and correct before
attempting to start the engine. Any
wrong connection may damage the elec-
trical system.
4. Start the engine, and then disconnect
the cables by reversing the steps above.
CAUTION:
●Never push the start switch while the
engine is running.
●Do not operate the start switch for
more than 5 seconds, otherwise the
battery will be discharged and the
engine will not start. Also, the starter
motor may be damaged. If the engine
does not start in 5 seconds, release
the start switch, wait 15 seconds, and
try again.

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EJU00609
Index
2-stroke engine oil ................................... 3-4
A
Adjusting the carburetor ........................ 4-21
Adjusting the trolling speed ................... 4-21
Adjusting the Yamaha Adjustable
Sponson (Y.A.S.) .................................. 4-23
Approval label of Emission control
certificate ................................................. 1-2
B
Battery .............................................. 3-8, 4-5
Beaching the watercraft ........................ 3-30
Bilge ........................................................ 3-7
Bleeding the oil injection pump ............. 4-22
Boarding alone ...................................... 3-23
Boarding and starting in deep water ..... 3-23
Boarding with a passenger.................... 3-24
Bow down.............................................. 2-12
Bow up .................................................. 2-12
C
Capsized watercraft .............................. 3-25
Caution labels ......................................... 1-7
Choke lever ............................................. 2-8
Cleaning and adjusting the spark
plugs...................................................... 4-15
Cleaning the jet intake and impeller ........ 5-4
Cleaning the watercraft ........................... 4-6
Connecting the jumper cables................. 5-6
Cooling water pilot outlet .............. 2-10, 3-12
Cruising limitations ................................ 1-10
D
Docking the watercraft .......................... 3-30
E
Emergency procedures ........................... 5-4
Emission control information ................... 1-2
Engine break-in ..................................... 3-13
Engine compartment ............................... 3-6
Engine overheat warning indicator ........ 2-18
Engine overheat warning system .......... 2-13
Engine serial number .............................. 1-1Engine shut-off cord (lanyard) ............... 3-11
Engine shut-off switch ............................. 2-8
Engine stop switch .................................. 2-8
Enjoy your watercraft responsibly ......... 1-15
F
Filling the fuel tank .................................. 3-3
Filling the oil tank .................................... 3-4
Fire extinguisher ...................................... 3-9
Flushing the cooling system .................... 4-1
Front storage compartment ................... 2-19
Fuel and oil.............................................. 3-1
Fuel and oil systems ............................... 3-6
Fuel cock knob ........................................ 2-7
Fuel filter ............................................... 4-11
Fuel meter ............................................. 2-17
Fuel system ............................................. 4-4
Fuel tank ............................................... 4-11
Fuel tank filler cap ................................... 2-6
Fuel warning indicator ........................... 2-18
G
Gasohol ................................................... 3-2
Gasoline .................................................. 3-1
Getting to know your watercraft ............ 3-19
Glove compartment ............................... 2-20
H
Handgrip ................................................ 2-14
Hazard information ................................ 1-13
Hood........................................................ 2-6
Hour meter ............................................ 2-17
Hull Identification Number (HIN).............. 1-1
I
Identification numbers ............................. 1-1
Important labels ....................................... 1-3
Inspecting and adjusting the throttle
cable...................................................... 4-13
Inspecting the battery ............................ 4-19
Inspecting the fuel system ..................... 4-10
Inspecting the oil injection system ......... 4-12
Inspecting the QSTS mechanism .......... 4-14
Inspecting the steering cable................ 4-13
J
Jet unit................................................... 3-11
Jumping the battery ................................. 5-5