5-2
E
Engine runs irregu-
larly or stallsFuel Empty Refill as soon as possi-
ble3-4
Stale or contaminated Have serviced by
Yamaha dealer4-10
Too much oil in fuel
mixing ratioCorrect fuel-to-oil ratio
to 50:13-3
Choke Knob is left pulled Push fully in 2-6
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 4-13
Incorrect heat range Replace 4-13
Gap incorrect Adjust 4-13
Spark plug cap Loose Connect properly 4-13
Cracked, torn or dam-
agedReplace
4-13
Electrical wir-
ingLoose electrical con-
nectionsTighten or connect
properly—
Carburetor Incorrect idle adjust-
mentAdjust idle
4-19
Clogged Have serviced by
Yamaha dealer4-19
Wate rcr af t slow or
loses powerCavitation Jet intake clogged Clean 5-3
Impeller damaged or
wornHave serviced by
Yamaha dealer5-3
Engine over-
heatedJet intake clogged Clean
5-3
Fuel filter Clogged Have serviced by
Yamaha dealer4-11
Spark plug Fouled or defective Replace 4-13
Incorrect heat range Replace 4-13
Gap incorrect Adjust 4-13
Spark plug
capsLoose Connect properly
4-13
Fuel Stale or contaminated Have serviced by
Yamaha dealer4-10 TROUBLE POSSIBLE CAUSE REMEDY PAGE
E_F1N-70.book Page 2 Tuesday, April 26, 2005 12:03 PM
6-1
E
EJU01125
Index
2-stroke engine oil ................................... 3-2
A
Adjusting the carburetor ........................ 4-19
Adjusting the choke cable ..................... 4-16
Adjusting the jet thrust nozzle angle ..... 4-21
Adjusting the steering friction ................ 4-20
Adjusting the trolling speed ................... 4-19
B
Battery .............................................. 3-8, 4-5
Beaching the watercraft ........................ 3-31
Bilge ........................................................ 3-8
Boarding and starting in deep water ..... 3-22
Boarding and starting in shallow
water ..................................................... 3-24
Builder’s plate.......................................... 1-2
C
Capsized watercraft .............................. 3-26
Choke knob ............................................. 2-6
Cleaning and adjusting the spark
plugs...................................................... 4-13
Cleaning the jet intake and impeller ........ 5-3
Cleaning the watercraft ........................... 4-6
Connecting the jumper cables................. 5-5
Cooling water pilot outlet ................ 2-7, 3-12
Cruising limitations .................................. 1-8
E
Emergency procedures ........................... 5-3
Engine break-in ..................................... 3-13
Engine compartment ............................... 3-6
Engine overheat warning system ............ 2-9
Engine serial number .............................. 1-1
Engine shut-off cord (lanyard) ............... 3-11
Engine shut-off switch ............................. 2-5
Engine stop switch .................................. 2-5
Enjoy your watercraft responsibly ......... 1-14
F
Filling the fuel tank .................................. 3-4
Fire extinguisher...................................... 3-9
Flushing the cooling system .................... 4-1Fuel and oil.............................................. 3-1
Fuel cock knob ........................................ 2-4
Fuel filter ............................................... 4-11
Fuel system ......................................3-7, 4-4
Fuel tank ............................................... 4-11
Fuel tank filler cap ................................... 2-4
G
Gasohol ................................................... 3-2
Gasoline .................................................. 3-1
Getting to know your watercraft ............ 3-19
H
Hazard information ................................ 1-12
Hood........................................................ 2-3
Hull .......................................................... 3-6
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 ............................ 4-17
Inspecting the fuel system ..................... 4-10
Inspecting the jet thrust nozzle angle .... 4-12
J
Jet unit................................................... 3-11
Jumping the battery ................................. 5-4
K
Kneeling ................................................ 3-25
L
Label location .......................................... 1-3
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 .................................. 4-14
M
Maintenance and adjustments ................ 4-7
Mixing fuel and oil ................................... 3-3
Model information.................................... 1-2
O
Operating positions ............................... 3-25
E_F1N-70.book Page 1 Tuesday, April 26, 2005 12:03 PM
