2021 YAMAHA EX DELUXE air filter

General and important labels
2
EJU44440Engine serial number
The engine serial number is stamped on a
plate attached to the engine unit. (See page
37 for seat removal and installation proce-
dures and page 41 for information on the seat
storage compartment.)
EJU44450Manufactured date label
This label is attached to the port side of the
air filter case. (See page 37 for seat removal
and installation procedures and page 42 for
information on the fire extinguisher holder.)
1Engine serial number location
1
1Manufactured date label location
1
UF3Y74E0.book Page 2 Monday, June 22, 2020 5:11 PM

Description
23
Engine compartment
8
3
1011
4
2
1
56
7
9
1 Water separator (page 26)
2 Fuel tank
3 Air filter case
4 Flushing hose connector (page 74)
5 Oil tank filler cap/Dipstick (page 45)
6 Oil tank
7 Battery (page 54)
8 Fuse box 9
Spark plug/Ignition coil
10 Fire extinguisher holder (page 42)
11 Seat storage compartment (page 41)
UF3Y74E0.book Page 23 Monday, June 22, 2020 5:11 PM

Care and storage
78
Steering cable (jet thrust nozzle end)
EX SPORT: Shift cable (reverse gate end)
and ball joint
TIP:
Disconnect the shift cable from the ball joint
before lubricating.
EX DELUXE / EX LIMITED: Shift rod (re-
verse gate end) and ball joint
TIP:
Disconnect the shift rod from the ball joint be-
fore lubricating.
EJU44790Rustproofing
Rustproofing the hull, deck, and engine
Spray metallic parts of the hull, deck, and en-
gine with a rust inhibitor.
Rustproofing the internal engine compo-
nents
Rustproof the internal engine components
with a rust inhibitor.
To rustproof the internal engine components:
(1) Remove the seat and fire extinguisherholder. (See page 37 for seat removal
and installation procedures and page 42
for information on the fire extinguisher
holder.)
(2) Remove the plastic tie that is fastening the fuel hose to the holder on the star-
board side of the air filter case.
UF3Y74E0.book Page 78 Monday, June 22, 2020 5:11 PM

Care and storage
79
(3) Release the hooks on the port side of theair filter case, and remove the air filter
case cover.
(4) Spray a rust inhibitor into the intake opening for 3 seconds. WARNING! Do
not spray flammable rust inhibitor
products on engine surfaces while the engine is hot. The sprayed substance
or propellants could catch fire.
[EWJ00262]
(5) Place the air filter case cover in its origi-
nal position, and then fit the hooks onto
the cover.
TIP:
Make sure that the air filter case cover is se-
curely installed.
(6) Fasten the fuel hose to the holder usingthe plastic tie.
(7) Make sure that the area around the wa- tercraft is clear, and then start the engine
in a well-ventilated area and let it run at
idle for 15 seconds. (See page 24 for in-
formation on starting the engine.)
(8) Stop the engine.
(9) Securely install the fire extinguisher hold- er and seat in their original positions.
1Hook
2 Air filter case cover
3 Fuel hose
4 Holder
5 Plastic tie
1
23
4
5
1Intake opening
1
UF3Y74E0.book Page 79 Monday, June 22, 2020 5:11 PM

Maintenance
81
EJU43101Periodic maintenance chart
The periodic maintenance chart gives general guidelines for periodic maintenance. Have a
Yamaha dealer perform the checks in the following chart. However, maintenance may need to be performed more frequently depending on your operating conditions. If you have any
questions, consult a Yamaha dealer.
This “ √” mark indicates items to be checked and serviced by a Yamaha dealer.
Item OperationInitial Thereafter every
Page
10 hours 50 hours
or 12
months *1 100
hours or 12
months *1 200
hours or 24
months *1
Fuel line Check fuel hoses and
clamps
√
—
Fuel filler cap/Wa-
ter separator Check O-rings for cracks
and deformation
√
—
Fuel tank Check installation and
straps
√
—
Water inlet strainer Check for clogs and dam-
age
√
—
Cooling water hos-
es Check for damage and
leakage, and check
clamps
√
—
Engine oil Replace √√ 83
Oil filter Replace √83
Spark plugs Check √√ —
Battery Check state of charge,
terminals and bands
√
—
Battery leads Check terminals √—
Steering master Check operation and for
looseness
√√
—
Steering cable Check exterior and con-
nections, and lubricate
√
—
Shift lever (EX
SPORT) Check exterior and con-
nections, and lubricate
√
—
Shift cable and re-
verse gate (EX
SPORT) Check exterior and con-
nections, and lubricate
√
—
Shift rod and reverse
gate (EX DELUXE /
EX LIMITED)Check exterior and con-
nections, and lubricate √
—
Air filter element Check for damage and
dirt
√
—
Air intake hoses Check for damage, and
check clamps
√
—
UF3Y74E0.book Page 81 Monday, June 22, 2020 5:11 PM

Trouble recovery
88
Watercraft slow or
loses powerCavitation Jet intake clogged Clean 89
Impeller damaged or
worn Have serviced by
Yamaha dealer
89
Engine over-
heat warning Engine speed reduc-
tion control activated Clean jet intake and
cool engine
35
Oil pressure
warning Engine speed reduc-
tion control activated Add oil
35
Spark plug Fouled or defective Have serviced by Yamaha dealer—
Incorrect heat range Have serviced by Yamaha dealer —
Gap incorrect Have serviced by Yamaha dealer —
Electrical wir-
ing Loose connection Have serviced by
Yamaha dealer —
Fuel Stale or contaminat- ed Have serviced by
Yamaha dealer
—
Air filter Clogged Have serviced by Yamaha dealer—
Oil buildup Have serviced by Yamaha dealer —
Throttle lever Faulty Have serviced by Yamaha dealer—
TROUBLE POSSIBLE CAUSE REMEDY PAGE
UF3Y74E0.book Page 88 Monday, June 22, 2020 5:11 PM