Yamaha Waverunner 3 Manual

3-4
E
INSP
ADJ
CONTROL SYSTEM
2. Adjust:
Throttle lever free play
Adjustment steps:
NOTE:
When not replacing the throttle cable or
removing the cable from the throttle body,
adjust the throttle cable free play by fol-
lowing steps (f) through (j).
When replacing the throttle cable or
removing the cable from the throttle body,
adjust the throttle cable free play by fol-
lowing steps (a) through (k).
a. Remove the air filter case cover 1
 and
flame arrester.
b. Pull back the cover 2
.
c. Loosen the...

3-5
E
INSP
ADJ
CONTROL SYSTEM
 WARNING
After adjusting the free play, turn the han-
dlebar to the right and left and make sure
that the trolling speed does not increase.j. Install the handlebar cover.
T R..
Handlebar cover screw:
1.1 N  m (0.11 kgf  m, 0.8 ft  lb)
LOCTITE
® 242
k. Install the flame arrester and air filter
case cover.
T R..
Flame arrester bolt:
1st:
3.3 N  m 
(0.33 kgf  m, 2.4 ft  lb)
2nd:
6.5 N  m 
(0.65 kgf  m, 4.7 ft  lb)
LOCTITE
® 242
Air filter case cover screw:
2.5 N  m...

3-6
E
INSP
ADJ
CONTROL SYSTEM
2. Adjust:
QSTS cable 
NOTE:
If the QSTS cable cannot be properly adjusted
by the cable joint at the QSTS converter end,
adjust the cable joint at the jet pump end so
that the same lengths are obtained. Refer to
“REMOTE CONTROL CABLES AND SPEED
SENSOR LEAD” in Chapter 8. Adjustment steps:
Set the control grip in the neutral position.
Loosen the locknut 1
.
Remove the nut 2
 and pivot pin 3
.
Set the jet thrust nozzle in the center
position.
Turn the cable joint 4
 for...

3-7
E
INSP
ADJ
CONTROL SYSTEM
Shift cable inspection and adjustment
1. Check:
Reverse gate stopper lever position
Incorrect →
 Adjust.
Checking steps:
Set the shift lever to the reverse position.
Check that the reverse gate 1
 contacts
the stopper 2
 on the bracket and the
lever 3
 contacts the reverse gate.

Set the shift lever to the forward position.

Check that the lever 4
 has been shifted
over the bracket 5
.
4
5
2. Adjust:
Shift cable joint
Adjustment steps:
Loosen the locknut 1
....

3-8
E
INSP
ADJ
CONTROL SYSTEM
Trolling speed check and adjustment
1. Measure:
Trolling speed
Out of specification →
 Adjust.  
Trolling speed:
1,600–1,800 r/min
Checking steps: (Watercraft on water)
Start the engine and allow it to warm up
for a 15 minutes.
Check the engine trolling speed using the
tachometer of the multifunction meter or
using the Yamaha Diagnostic System.
2. Adjust:
Trolling speed 
Adjustment steps:
Remove the air filter case cover 1
.
Start the engine.
Turn the throttle stop...

3-9
E
INSP
ADJ
FUEL SYSTEM
FUEL SYSTEM
 WARNING
When removing fuel system parts, wrap
them in a cloth and take care that no fuel
spills into the engine compartment.
Fuel line inspection
1. Inspect:
Fuel strainer 1
 
Clog/contaminants →
 Clean.
Fuel pump filter
Clog/contaminants →
 Clean.
Refer to “FUEL TANK AND FUEL
PUMP MODULE” in Chapter 4.
Fuel hose
Damage/cracks →
 Replace.
O-rings (quick connector)
Damage/cracks →
 Replace the quick
connector.
Fuel pipe
Damage/cracks →
 Replace the fuel
pump....

3-10
E
INSP
ADJ
POWER UNIT
POWER UNIT
Valve clearance adjustment
The following procedure applies to all of the
valves.
NOTE:
Valve clearance adjustment should be made
on a cold engine, at room temperature. 
When the valve clearance is to be measured
or adjusted, the piston must be at top dead
center (TDC) on the compression stroke. 
1. Remove: 
Air filter case
Refer to “FUEL INJECTION SYSTEM”
in Chapter 4.
2. Remove:
Spark plugs 
Cylinder head cover
Cylinder head cover gasket 
Refer to “CAMSHAFTS”...

3-11
E
INSP
ADJ
POWER UNIT
4. Measure:
Valve clearance
Out of specification →
 Adjust.
Valve clearance (cold):
Intake valve:
0.11–0.20 mm 
(0.0043–0.0079 in)
Exhaust valve:
0.25–0.34 mm 
(0.0098–0.0134 in)
Measurement steps:
Turn the drive coupling counterclockwise,
and then check if cylinder #1 is at TDC of
the compression stroke with a dial gauge.
NOTE:
TDC on the compression stroke can be
found when the camshaft lobes are turned
away from each other.
Measure the valve clearance with a thick-
ness...

3-12
E
INSP
ADJ
POWER UNIT
5. Remove:
Timing chain tensioner cap bolt 1
 
Gasket
1
6. Turn the timing chain tensioner rod fully
clockwise with a thin screwdriver 1
.
NOTE:
Make sure that the tensioner rod has been fully
set clockwise.
1
7. Remove:
Intake camshaft caps
Exhaust camshaft caps
Timing chain
(from the camshaft sprockets)
Intake camshaft
Exhaust camshaft
NOTE:
Refer to “CAMSHAFTS” in Chapter 5. 
When removing the timing chain and cam-
shafts, fasten the timing chain with a wire to...

3-13
E
INSP
ADJ
POWER UNIT
8. Adjust:
Valve clearance
Adjustment steps:
Remove the valve lifter 1
 and the valve
pad 2
.
NOTE:
Cover the timing chain opening with a rag
to prevent the valve pad from falling into
the crankcase. 
Make a note of the position of each valve
lifter 3
 and valve pad 4
 so that they can
be installed in the correct place. 
Select the proper valve pad from the fol-
lowing table.
Valve pad thickness 
rangeAvailable valve 
pads
Nos. 
120–2401.20–
2.40 mm25 thicknesses in 
0.05...