2003 YAMAHA XL 700 spark plugs

2-3
E
1Silencer
Prevents water from getting into the engine
and reduces air intake noise.
2Spark plugs/caps
3Electrical box
Protects electrical components from water.
4Spark plug lead
5Muffler6Fuel tank
7Oil tank
8Fuel filter
9Flush hose connector
Use to flush the engine cooling water pas-
sages.
0Battery
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E
4
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MAINTENANCE AND
CARE
Storage ...................................................... 4-1
Flushing the cooling system .................. 4-1
Lubrication .............................................. 4-3
Fuel system ............................................ 4-4
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 oil injection system ....... 4-12
Inspecting the jet thrust nozzle
angle ..................................................... 4-13
Inspecting and adjusting the throttle
cable ..................................................... 4-13
Cleaning and adjusting the
spark plugs ........................................... 4-14
Lubrication points ................................. 4-15
Adjusting the choke cable .................... 4-17
Inspecting the battery .......................... 4-18
Adjusting the carburetor ...................... 4-20
Replacing the fuse ............................... 4-21
Bleeding the oil injection pump ............ 4-21
Specifications ........................................ 4-22
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Periodic maintenance chart
The following chart gives general guidelines for periodic maintenance. However, depend-
ing on your operating conditions maintenance may need to be performed more frequently.
(

) This mark indicates maintenance that you may do yourself.
(
❍) This mark indicates work to be done by a Yamaha dealer.
MAINTENANCE INTERVAL
INITIALTHEREAFTER
EVERYPA G E
10
hours50
hours100
hours100
hours200
hours
ITEM
6
months12
months12
months24
months
Spark plug Inspect, clean, adjust




4-14
Lubrication points Lubricate


4-15
Intermediate housing Lubricate❍
*1

*2

*2 4-16
Fuel system Inspect❍❍
4-10
Fuel filter Check, clean, replace❍❍
4-11
Fuel tank Clean❍
4-11
Oil injection system Inspect, clean❍❍
—
Carburetor setting Inspect, adjust❍❍❍
4-20
Trolling speed Inspect, adjust


4-20
Carburetor throttle shaft Inspect❍❍
—
Cooling water passages Flush

*3 4-1
Bilge strainer Clean


—
Impeller Inspect

*4❍❍
—
Jet thrust nozzle angle Inspect


4-13
Throttle lever Check operation

*4 4-13
Throttle cable Inspect, adjust


4-13
Choke knob Check operation

*4 4-17
Choke cable Inspect, adjust❍❍
4-17
Stern drain plugs Inspect, replace

*4❍❍
3-7
Battery Inspect

*5❍❍
4-18
Rubber coupling Inspect❍
—
Engine mount Inspect❍
—
Nuts and bolts Inspect❍❍❍
—
*1: Grease capacity: 33.0–35.0 cm3 (1.11–1.18 oz)
*2: Grease capacity: 6.0–8.0 cm3 (0.20–0.27 oz)
*3: After every use
*4: Before every use
*5: Inspect fluid level before every use
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4-14
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Cleaning and adjusting the
spark plugs
The spark plug is an important engine
component and is easy to inspect. The con-
dition of the spark plug can indicate some-
thing about the condition of the engine. For
example, if the center electrode porcelain is
very white, this could indicate an intake air
leak or carburetion problem in that cylinder.
Do not attempt to diagnose any problems
yourself. Have a Yamaha dealer service the
watercraft.
Remove and inspect the spark plug peri-
odically; heat and deposits will cause the
spark plug to slowly break down and erode.
If electrode erosion becomes excessive, or if
carbon and other deposits are excessive,
replace the spark plug with the specified
plug.
Measure the spark plug gap a with a
wire thickness gauge before installing the
spark plug. Adjust the gap to specification if
necessary.
To reinstall spark plug:
1. Clean the gasket surface.
2. Wipe any dirt from the threads of the
spark plug.
3. Screw the spark plug to the correct
torque. Standard spark plug: BR8HS
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Spark plug torque:
25 N·m (2.5 kgf·m, 18 ft·lb)
UF0M74.book Page 14 Wednesday, July 31, 2002 2:45 PM

5-8
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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.
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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