Maintenance and care
70
EJU37060Periodic maintenance chart
The following chart gives general guidelines for periodic maintenance. However, maintenance
may need to be performed more frequently depending on your operating conditions.
This“” mark indicates maintenance that you may do yourself.
This“” mark indicates work to be done by a Yamaha dealer.
Item OperationInitial Thereafter every
Page 10
hours50
hours100
hours100
hours200
hours
6
months12
months12
months24
months
Spark plugsCheck, clean, adjust 74
Lubrication pointsLubricate 75
Internal engine
componentsLubricate*2
50 hours or 12 months—
QSTS cablesLubricate—
Intermediate hous-
ingLubricate 75
Fuel systemCheck 72
Fuel tankCheck, clean 72
Trolling speedCheck, adjust 78
Throttle shaftCheck—
Cooling water pas-
sagesFlush
*167
Water inlet strain-
erCheck, clean—
Bilge strainerClean—
Electric bilge
pump strainerCheck, clean—
ImpellerCheck—
Jet thrust nozzle
angleCheck, adjust 72
Steering masterCheck—
QSTS mechanismCheck, adjust—
Shift cable and re-
verse gateCheck, adjust 73
Throttle cableCheck, adjust 73
Stern drain plugsCheck, replace 47
UF2R70E0.book Page 70 Thursday, November 6, 2008 10:05 AM
Maintenance and care
74
If the throttle lever does not move smoothly or
if the throttle lever free play is not within the
specified range, have a Yamaha dealer ser-
vice the watercraft.
EJU37041Cleaning and adjusting the spark
plugs
WARNING
EWJ00350
Be careful not to damage the insulator
when removing or installing a spark plug.
A damaged insulator could allow sparks to
escape, which could result in a fire or ex-
plosion.
The spark plug is an important engine compo-
nent and is easy to inspect. The condition of
the spark plug can indicate something about
the condition of the engine. For example, if
one spark plug has a distinctly different color,
the engine could require servicing. Do not at-
tempt to diagnose any problems yourself.
Have a Yamaha dealer service the watercraft.
Remove and inspect the spark plugs periodi-
cally; heat and deposits will cause the spark
plugs to slowly break down and erode. If elec-
trode erosion becomes excessive, or if carbon
and other deposits are excessive, replace the
spark plug with the specified plug.
To remove a spark plug:
(1) Remove the seats. (See page 23 for seat
removal and installation procedures.)(2) Remove the engine cover screws, and
then remove the engine cover.
(3) Remove the spark plug cap bolts, and
then remove the spark plug cap.
NOTICE: Do not use any tools to re-
move or install the spark plug cap,
otherwise the ignition coil coupler
could be damaged. The spark plug
cap may be difficult to remove be-
cause the rubber seal on the end of
the cap fits tightly. To remove the
spark plug cap, simply twist it back
and forth while pulling it up; to install
it, twist it back and forth while pushing
it down.
[ECJ00211]
Specified spark plug:
LFR6A
1Engine cover screw
2Engine cover
1 2
UF2R70E0.book Page 74 Thursday, November 6, 2008 10:05 AM
