Page 69 of 106

E
4
EJU01086 
MAINTENANCE AND 
CARE
Storage ...................................................... 4-1
Flushing the cooling system  .................. 4-1
Lubrication .............................................. 4-3
Fuel system ............................................ 4-5
Battery .................................................... 4-5
Cleaning the watercraft .......................... 4-6
Maintenance and adjustments .............. 4-7
Owner’s/Operator’s Manual and 
tool kit  ..................................................... 4-8
Periodic maintenance chart  ................... 4-9
Inspecting the fuel system  ................... 4-10
Inspecting the steering cable ............... 4-12
Inspecting and adjusting the throttle 
cable ..................................................... 4-12
Cleaning and adjusting the spark 
plugs ..................................................... 4-13
Lubrication points  ................................. 4-14
Adjusting the choke cable .................... 4-16
Inspecting the battery  .......................... 4-17
Adjusting the carburetor  ...................... 4-19
Replacing the fuse  ............................... 4-20
Adjusting the steering friction  .............. 4-20
Adjusting the jet thrust nozzle angle  ... 4-21
Specifications ........................................ 4-23
E_F1N-70.book  Page 1  Wednesday, July 18, 2001  3:28 PM 
         
        
        
     
        
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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.
EJU01367 
Troubleshooting chart  
TROUBLE POSSIBLE CAUSE REMEDY PAGE
Engine does not 
startStarter motor does not turn over
Engine shut-
off switch Clip not in place Install clip
2-5
Fuse Burned  out Replace fuse and check 
wiring4-20
Battery Run down Recharge 4-18
Poor terminal connec-
tionsTighten as required
4-18
Starter motor Faulty Have serviced by 
Yamaha dealer—
Starter motor turns over
Fuel cock Turned to “OFF”Turn fuel cock knob to 
“ON”2-4
Fuel Empty Refill as soon as possi-
ble3-4
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 4-13
Spark plug cap Not connected or loose Connect properly 4-13
Crankcase Filled with water Crank engine with plug 
out until clean5-7
Fuel filter Clogged or water 
pooledHave serviced by 
Yamaha dealer4-11
Choke Knob moves back on 
its ownTighten choke knob 
adjusting nut4-16
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6-2
E
M
Maintenance and adjustments ................ 4-7
Mixing fuel and oil ................................... 3-3
O
Operating positions ............................... 3-25
Operating your watercraft...................... 3-19
Operation .............................................. 3-13
Operation of controls and other 
functions .................................................. 2-3
Operation requirements ........................ 1-10
Other labels ............................................. 1-7
Owner’s/Operator’sManualandtoolkit ...... 4-8
P
Periodic maintenance chart..................... 4-9
Post-operation checks........................... 3-31
Pre-operation check list........................... 3-5
Pre-operation check points ..................... 3-6
Pre-operation checks .............................. 3-5
Primary Identification (PRI-ID) number ... 1-1
R
Recommended equipment .................... 1-12
Replacing the fuse ................................ 4-20
Rough water operation .......................... 3-30
S
Safe boating rules ................................. 1-14
Safety information ................................... 1-8
Specifications ........................................ 4-23
Standing ................................................ 3-25
Starting the engine ................................ 3-15
Starting the watercraft ........................... 3-21
Start switch.............................................. 2-6
Steering pole .................................. 2-8, 3-10
Steering system ............................. 2-7, 3-10
Stopping the engine .............................. 3-18
Stopping the watercraft ......................... 3-29
Storage.................................................... 4-1
Storage pouch ....................................... 2-10
Submerged watercraft ............................. 5-7
Switches ................................................ 3-12T
Throttle .................................................. 3-10
Throttle lever ........................................... 2-6
Towing the watercraft .............................. 5-6
Transporting .......................................... 3-33
Troubleshooting ...................................... 5-1
Troubleshooting chart ............................. 5-1
Turning the watercraft ........................... 3-27
W
Warning labels ........................................ 1-4
Watercraft characteristics ...................... 1-13
Water separator ...................................... 3-7
E_F1N-70.book  Page 2  Wednesday, July 18, 2001  3:28 PM