SELVA MARINE Wahoo 15 Service Manual page 281

Symptom 1: Limited engine speed (below 2,000 r/min)
Symptom 2
• Buzzer comes on
(remote control
model)
• Overheat warning
indicator comes
on
• Cooling water
does not dis-
charge from the
cooling water pilot
hole
• Buzzer comes on
(remote control
model)
• Oil pressure warn-
ing indicator
comes on
6AG3J11
Cause 1
Clogged cooling
water inlet
Clogged cooling
water passages
Cooling water leak-
age
Damaged water
pipe or incorrect
installation
Water pump mal- Damaged water
function pump impeller
Water leakage from
water pump hous-
ing
Thermostat mal-
function
Thermoswitch mal-
function
Insufficient engine
oil
Engine oil pressure
decrease
Oil pump malfunc-
tion
Clogged oil strainer
Clogged oil pas-
sages
Clogged oil filter
Oil pressure switch
malfunction
Troubleshooting the outboard motor
Cause 2 Checking step
Check the cooling
—
water inlets.
Check the cooling
water passages.
—
Check the water
— pipe and its installa-
tion.
Check the impeller.
Check the Woo-
druff key.
Check the water
pump housing.
Check the insert
cartridge.
Check the outer
plate cartridge.
Check the thermo-
—
stat.
Check the ther-
—
moswitch.
Add sufficient oil.
—
Check the oil pres-
—
sure.
Check the oil pump.
Check the oil
strainer.
Check the engine
oil passages (power
unit and oil pump).
Replace the oil fil-
ter.
Check the oil pres-
—
sure switch.
Refer
to
1
page
3-7
3-7
2
7-15
3
6-5
6-5
4
6-5
6-5
5
6-5
3-6
8-25
6
3-3
5-1
7
5-47
7-16
8
5-37
3-4
9
8-26
9-6