Pre-operation checks
35
EJU32282
Pre-operation check pointsEJU40686Pre-launch checks
Perform the pre-launch checks in the pre-op-
eration checklist while the watercraft is on
land.
To perform the pre-launch checks:
(1) Remove the hood. (See page 23 for hood
removal and installation procedures.)
(2) Perform the checks and make sure that
there are no malfunctioning items or oth-
er problems.
(3) After completing these checks, install the
hood in its original position.
EJU32334Engine compartment check
WARNING
EWJ00462
Failure to ventilate the engine compart-
ment could result in a fire or explosion. Do
not start the engine if there is a fuel leak.
Ventilate the engine compartment. Leave the
engine compartment open for a few minutes
to allow any fuel vapors to escape.
Make sure that there is no damage inside the
engine compartment.
EJU34208Fuel system checks
WARNING
EWJ00382
Leaking fuel can result in fire or explosion.
Check for fuel leakage regularly.
If any fuel leakage is found, the fuel sys-
tem must be repaired by a qualified me-
chanic. Improper repairs can make the
watercraft unsafe to operate.
Make sure that there is no damage, leakage,
or other problem in the fuel system.
Check:
Carburetor for leakage
Fuel filler cap and seal for damage
Fuel in fuel tank for water and dirt
Fuel tank for damage and leakage
Fuel hoses and joints for damage and leak-
age
Fuel filter for leakage
Fuel cock for leakage
Fuel tank breather hose for damage and
leakage
Releasing the pressure in the fuel tank
Release the pressure in the fuel tank before
each use.
To release the pressure in the fuel tank:
(1) Loosen the fuel filler cap slowly and re-
move it to release any pressure in the fuel
tank.
(2) Securely install the fuel filler cap by tight-
ening it until it stops.
EJU32365Fuel level check
Check the fuel level in the fuel tank.
1Fuel filler cap
UF4D74E0.book Page 35 Tuesday, March 21, 2017 9:35 AM
Maintenance
61
(4) Install the spark plug cap by pushing it
down until it is securely installed in its
original position.
(5) Securely install the hood in its original
position.
EJU41182Lubrication points
Lubricate moving parts with water-resistant
grease. (See page 54 for information on the
main lubrication points.)
Intermediate housing
Fill the intermediate housing with water-resis-
tant grease through the grease nipple using a
grease gun.
EJU34226Checking the fuel filter
Check the fuel filter. The fuel filter should be
replaced if water or dirt is found in the filter.Have a Yamaha dealer replace the fuel filter if
necessary.
EJU34442Adjusting the choke cable
Check that the choke cable is properly ad-
justed.
To adjust the choke cable:
(1) Pull the choke knob out until it stops, and
then release the knob. The knob should
not move.
(2) If the choke knob moves back on its
own, tighten the choke knob adjusting
nut slightly. If the knob is difficult to
move, loosen the adjusting nut slightly.
EJU34464Adjusting the carburetor
NOTICE
ECJ00173
If the carburetor settings are disturbed by
someone who does not have the neces- Recommended water-resistant grease:
YAMALUBE MARINE
GREASE/Yamaha Grease A
Grease quantity:
Initial 10 hours or 1 month:
20.0–22.0 cm³ (0.68–0.74 US oz,
0.71–0.78 Imp.oz)
Every 100 hours or 12 months:
3.0–5.0 cm³ (0.10–0.17 US oz,
0.11–0.18 Imp.oz)
1Fuel filter
1Choke knob adjusting nut
UF4D74E0.book Page 61 Tuesday, March 21, 2017 9:35 AM
