Page 104 of 116
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 over-
heatedJet intake clogged Clean
5-4
Fuel filter Clogged Have serviced by
Yamaha dealer4-11
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 3-7 TROUBLE POSSIBLE CAUSE REMEDY PAGE
UF0M74.book Page 3 Wednesday, July 31, 2002 2:45 PM
Page 109 of 116

5-8
E
EJU01905
Submerged watercraft
If the watercraft is submerged or flooded
with water, follow the procedure below and
consult a Yamaha dealer as soon as possi-
ble. Failure to do so may result in serious
engine damage!
In an emergency:
1. Beach the watercraft and remove the
stern drain plugs to drain the water from
the engine compartment.
2. Turn the fuel cock knob to “OFF.”
3. Remove the spark plugs and dry them
with a cloth.
4. Without reinstalling the spark plugs,
crank the engine until all the water in the
cylinders has been drained.
5. Install the stern drain plugs and the
spark plugs.
6. Turn the fuel cock to “ON.”
7. Launch the watercraft into the water, and
then run the engine for at least
10 minutes. If the engine does not start,
repeat steps 2–7.
8. Turn the engine off.
9. Turn the fuel cock to “OFF,” remove the
silencer cap, and then spray a rust inhib-
itor into the carburetor while cranking the
engine.
10. Have the watercraft inspected by a
Yamaha dealer as soon as possible.
UF0M74.book Page 8 Wednesday, July 31, 2002 2:45 PM
Page 112 of 116

6-1
E
EJU01125
Index
2-stroke engine oil ................................... 3-2
A
Adjusting the carburetor ........................ 4-20
Adjusting the choke cable ..................... 4-17
Adjusting the trolling speed ................... 4-20
B
Battery .............................................. 3-8, 4-5
Beaching the watercraft ........................ 3-30
Bilge ........................................................ 3-7
Bleeding the oil injection pump ............. 4-21
Boarding alone ...................................... 3-23
Boarding and starting in deep water ..... 3-23
Boarding with passengers ..................... 3-24
C
Capsized watercraft .............................. 3-25
Choke knob ............................................. 2-9
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 .............. 2-11, 3-12
Cruising limitations .................................. 1-8
D
Docking the watercraft .......................... 3-30
E
Emergency procedures ........................... 5-4
Engine break-in ..................................... 3-13
Engine compartment ............................... 3-6
Engine overheat warning system .......... 2-13
Engine serial number .............................. 1-1
Engine shut-off cord (lanyard) ............... 3-11
Engine shut-off switch ............................. 2-9
Engine stop switch .................................. 2-9
Enjoy your watercraft responsibly ......... 1-15
F
Filling the fuel tank .................................. 3-3
Filling the oil tank .................................... 3-4
Finger grip ............................................. 2-12Fire extinguisher ...................................... 3-9
Flushing the cooling system .................... 4-1
Front seat ................................................ 2-5
Front storage compartment ................... 2-15
Fuel and oil.............................................. 3-1
Fuel and oil systems ............................... 3-6
Fuel cock knob ........................................ 2-8
Fuel filter ............................................... 4-11
Fuel system ............................................. 4-4
Fuel tank ............................................... 4-11
Fuel tank filler cap ................................... 2-7
G
Gasohol ................................................... 3-2
Gasoline .................................................. 3-1
Getting to know your watercraft ............ 3-19
Glove compartment ............................... 2-16
H
Handgrip ................................................ 2-12
Hazard information ................................ 1-12
Hood........................................................ 2-6
Hull Identification Number (HIN).............. 1-1
I
Identification numbers ............................. 1-1
Important labels ....................................... 1-2
Inspecting and adjusting the throttle
cable...................................................... 4-13
Inspecting the battery ............................ 4-18
Inspecting the fuel system ..................... 4-10
Inspecting the jet thrust nozzle angle .... 4-13
Inspecting the oil injection system ......... 4-12
J
Jet unit................................................... 3-11
Jumping the battery ................................. 5-5
L
Label location .......................................... 1-2
Learning to operate your watercraft ...... 3-19
Leaving the watercraft ........................... 3-18
Limitations on who may operate the
watercraft ................................................ 1-7
Location of main components ................. 2-1
Lubrication............................................... 4-3
Lubrication points .................................. 4-15
UF0M74.book Page 1 Wednesday, July 31, 2002 2:45 PM
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