Yamaha F30A - Page 272

TRBL
SHTG
Troubleshooting
9-7 67C3K11
Symptom 1: Limited engine speed
Symptom 2 Cause 1 Cause 2 Checking step
Refer
to
page
• Buzzer comes on
(E and W model)
• Overheat warning
indicator comes
on
• Cooling water
does not dis-
charge from the
cooling water pilot
hole
Clogged cooling
water inlet
—
Check the cooling
water inlets.
3-7
Clogged cooling
water passages
—
Check the cooling
water passages.
3-7
Cooling water leak-
age
Damaged water
pipe or incorrect
installation
—
Check the water
pipe and its installa-
tion.
7-19
Water pump mal-
function
Damaged water
pump impeller
Check the impeller. 6-5
Check the Woo-
druff key.
6-5
Water leakage from
water pump hous-
ing
Check the water
pump housing.
6-5
Check the insert
cartridge.
6-5
Check the outer
plate cartridge.
6-5
Thermostat mal-
function
—
Check the thermo-
stat.
3-7
Thermo sensor mal-
function
—
Check the thermo
sensor.
8-21
• Buzzer comes on
(E and W model)
• Oil pressure-
warning indicator
comes on
Insufficient engine
oil
—
Add sufficient oil. 3-4
Engine oil pressure
decrease
—
Check the oil pres-
sure.
5-1
Oil pump malfunc-
tion
Check the oil pump. 5-29
Clogged oil strainer Check the oil
strainer.
7-20
Clogged engine oil
passages
Check the engine
oil passages (power
unit and oil pump).
5-29
Clogged oil filter Replace the oil fil-
ter.
3-5
Oil pressure switch
malfunction
—
Check the oil pres-
sure switch.
8-21