Page 97 of 118

4-18
E
EJU01108
Inspecting the battery
Check the level of the battery electrolyte
and make sure the leads are secure.
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 produce explosive gases. Keep
sparks, flame, cigarettes, etc., well away.
If using or charging the battery in an
enclosed space, make sure that it is well
ventilated. Always shield your eyes when
working near batteries.
KEEP OUT OF THE REACH OF CHILDREN.
@
CAUTION:@ Be careful not to place the battery on its
side.
Make sure to remove the battery from the
battery compartment when adding bat-
tery electrolyte or charging the battery.
When checking the battery, make sure
the breather hose is connected to the
battery and not obstructed.
@
UF0X72.book Page 18 Friday, August 3, 2001 11:13 AM
Page 98 of 118

4-19
E
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 cor-
rect 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
UF0X72.book Page 19 Friday, August 3, 2001 11:13 AM
Page 99 of 118

4-20
E
EJU01109
Adjusting the carburetor
The carburetor is a vital part of the engine
and requires very sophisticated adjustment.
Most adjusting should be left to a Yamaha
dealer who has the professional knowledge
and experience to perform it. However, the
operator may adjust the trolling speed as
part of the usual maintenance routine.
CAUTION:@ The carburetor was set at the Yamaha
factory after many tests. If the settings
are disturbed by someone who does not
have the necessary technical knowledge,
poor engine performance and damage
may result.
@
EJU01110
Adjusting the trolling speed
1. Put the watercraft in the water.
2. Start the engine and warm it up for 1 or 2
minutes. Using a diagnostic tachometer
or, if necessary, the tachometer in the
multifunction information center, adjust
the engine speed to specification.
3. Turn the throttle stop screw 1 clockwise
to increase engine speed if necessary.
Turn it counterclockwise to decrease
engine speed if necessary.
Trolling speed: 1,300–1,400 r/min
UF0X72.book Page 20 Friday, August 3, 2001 11:13 AM
Page 100 of 118
4-21
E
EJU01111
Replacing the fuse
The fuse is attached to the electrical box.
To replace the fuse:
1. Remove the cap 1, and then pull out the
defective fuse 3 by using the fuse
puller2.
2. Install the spare fuse 4 of the correct
amperage.
WARNING@ Do not use fuses of higher amperage that
those recommended. Substitution of a
fuse of improper rating can cause exten-
sive electrical system damage and possi-
ble fire.
@
EJU01112
Bleeding the oil injection
pump
If the oil tank becomes completely empty,
or any hose connected to the oil pump has
been disconnected, the oil pump must be
bled to ensure proper oil flow.
If bleeding of the oil pump is necessary,
have a Yamaha dealer bleed it.Fuse amperage: 10 A, 20 A
UF0X72.book Page 21 Friday, August 3, 2001 11:13 AM
Page 101 of 118
4-22
E
EJU01113
Adjusting the Yamaha
Adjustable Sponson (Y.A.S.)
The Yamaha Adjustable Sponsons can be
adjusted to enhance watercraft performance
according to operator preference and oper-
ating conditions. (See page 2-21 for an
explanation of various positions.)
To adjust the Y.A.S.:
1. Remove the bolts 1 on both sponsons.
2. Remove both sponsons, and then install
them in the desired position.
NOTE:@ Be sure to install both sponsons to the same
level.
@
3. Tighten the bolts on both sponsons to
the correct torque.
Tightening torque:
18 N·m (1.8 kgf·m, 13 ft·lb)
UF0X72.book Page 22 Friday, August 3, 2001 11:13 AM
Page 102 of 118

4-23
E
EJU01114
Specifications
SPC-F0X7EMODEL
ITEMUnit GP1200R
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) 306 (675)
PERFORMANCE
Maximum output kW (PS) @ r/min 114.0 (155)@ 7,000
Maximum fuel consumption L/h (US gal/h, Imp gal/h) 64.0 (16.9, 14.1)
Cruising range at full throttle hr. 0.9
Trolling speed r/min 1,300–1,400
ENGINE
Engine type 2-stroke
Number of cylinders 3
Engine displacement
cm
3 (cu in)1,176 (71.7)
Bore & stroke mm (in) 80.0 ×
78.0 (3.15 ×
3.07)
Compression ratio 5.9:1
Lubrication system Variable oil injection
Cooling system Water cooled
Starting system Electric starter
Ignition system Digital CDI
Spark plug BR8ES-11 (NGK)
Spark plug gap mm (in) 1.0–1.1 (0.039–0.043)
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)
UF0X72.book Page 23 Friday, August 3, 2001 11:13 AM
Page 103 of 118
E
5
EJU01115
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
UF0X72.book Page 1 Friday, August 3, 2001 11:13 AM
Page 104 of 118

5-1
E
EJU01116
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.
EJU01117
Troubleshooting chart
TBC-F0X7ETROUBLE 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 wiring4-21
Battery Run down Recharge 4-19
Poor terminal connec-
tionsTighten as required
4-19
Terminal corroded Clean—
Starter motor Faulty Have serviced by
Yamaha dealer—
Micro-com-
puterOverheat mode Cool down engine
2-13
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 dealer4-9
Fuel tank Water or dirt present Have serviced by
Yamaha dealer4-10
Spark plug Fouled or defective Clean or replace 4-14
Spark plug cap Not connected or loose Connect properly 4-14
Crankcase Filled with water Crank engine with plug
out until clean5-8
Fuel filter Clogged or water
pooledHave serviced by
Yamaha dealer4-10
Choke Choke valve can not be
closed surely by lever
operationHave serviced by
Yamaha dealer—
UF0X72.book Page 1 Friday, August 3, 2001 11:13 AM