engine overheat YAMAHA GP1300R 2003 User Guide

5-3
E
Wate rcr af t slow or
loses powerCavitation Jet intake clogged Clean 5-4
Impeller damaged or
wornHave serviced by
Yamaha dealer—
Engine
overheatedJet intake clogged Clean
5-4
Spark plug Fouled or defective Replace 4-14
Incorrect heat range Replace 4-14
Gap incorrect Adjust 4-14
Spark plug
capsLoose Connect properly
4-14
Electrical
wiringLoose connection Tighten or connect
properly—
Fuel Stale or contaminated Have serviced by
Yamaha dealer4-10
Bilge Water in bilge Drain 3-8 TROUBLE POSSIBLE CAUSE REMEDY PAGE
UF1G70.book Page 3 Wednesday, December 18, 2002 3:35 PM

5-4
E
EJU11180
Emergency procedures
EJU11190
Cleaning the jet intake and
impeller
If weeds or debris get caught in the intake
or impeller, cavitation can occur, causing jet
thrust to decrease even though engine
speed rises. If this condition is allowed to
continue, the engine will overheat and may
seize. If there is any sign that the jet intake
or impeller is clogged with weeds or debris,
beach the watercraft and check the intake
and impeller. Always stop the engine before
beaching the watercraft.
WARNING@ Before attempting to remove weeds or
debris from the jet intake or impeller
areas, shut the engine off and remove
the clip from the engine shut-off switch.
Severe injury or death could result from
contact with the rotating parts of the jet
pump.
@
1. Turn the watercraft on its side as shown.
CAUTION:@
Place a suitable clean cloth or carpet-
ing underneath the watercraft to pro-
tect it from abrasions and scratches.

Always turn the watercraft over onto
its port (left) side.

When turning the watercraft on its
side, support the bow so the handle-
bars cannot be bent or damaged.
@
UF1G70.book Page 4 Wednesday, December 18, 2002 3:35 PM

6-1
E
EJU11250
Index
2-stroke engine oil ................................... 3-3
A
Adjusting the fuel injection system ........ 4-20
Adjusting the Yamaha Adjustable
Sponson (Y.A.S.) .................................. 4-22
Approval label of Emission control
certificate ................................................. 1-2
B
Battery .............................................. 3-9, 4-5
Beaching the watercraft ........................ 3-30
Bilge ........................................................ 3-8
Bleeding the oil injection pump ............. 4-21
Boarding alone ...................................... 3-23
Boarding and starting in deep water ..... 3-23
Boarding with a passenger.................... 3-24
Bow down.............................................. 2-11
Bow up .................................................. 2-11
C
Capsized watercraft .............................. 3-25
Check engine warning indicator ............ 2-18
Checking the trolling speed ................... 4-20
Cleaning and adjusting the
spark plugs ............................................ 4-14
Cleaning the jet intake and impeller ........ 5-4
Cleaning the watercraft ........................... 4-6
Connecting the jumper cables................. 5-6
Cooling water pilot outlet ................ 2-8, 3-13
Cruising limitations ................................ 1-10
D
Docking the watercraft .......................... 3-30
E
Emergency procedures ........................... 5-4
Emission control information
(For Canada only) ................................... 1-2
Engine break-in ..................................... 3-14
Engine compartment ............................... 3-7
Engine overheat warning indicator ........ 2-19
Engine overheat warning system .......... 2-12
Engine serial number .............................. 1-1
Engine shut-off cord (lanyard) ............... 3-12Engine shut-off switch ............................. 2-7
Engine stop switch .................................. 2-7
Enjoy your watercraft responsibly ......... 1-16
Exhaust temperature warning
indicator................................................. 2-19
Exhaust temperature warning
system ................................................... 2-13
F
Filling the fuel tank .................................. 3-4
Filling the oil tank .................................... 3-5
Fire extinguisher .................................... 3-10
Flushing the cooling system .................... 4-1
Front storage compartment ................... 2-20
Fuel and oil.............................................. 3-1
Fuel and oil systems ............................... 3-7
Fuel meter ............................................. 2-16
Fuel system ............................................. 4-3
Fuel tank ............................................... 4-10
Fuel tank filler cap ................................... 2-6
Fuel warning indicator ........................... 2-17
G
Gasohol ................................................... 3-3
Gasoline .................................................. 3-1
Getting to know your watercraft ............ 3-19
Glove compartment ............................... 2-21
H
Handgrip ................................................ 2-11
Hazard information ................................ 1-14
Hood........................................................ 2-6
Hour meter/Voltmeter ............................ 2-17
Hull Identification Number (HIN).............. 1-1
I
Identification numbers ............................. 1-1
Important labels ....................................... 1-3
Inspecting and adjusting the
throttle cable.......................................... 4-12
Inspecting the battery ............................ 4-18
Inspecting the fuel system ..................... 4-10
Inspecting the jet thrust nozzle angle .... 4-12
Inspecting the oil injection system ......... 4-11
Inspecting the QSTS mechanism .......... 4-13
UF1G70.book Page 1 Wednesday, December 18, 2002 3:35 PM