Yamaha F30A Service Manual page 275

Symptom 1: Cooling water does not discharge from the cooling water pilot hole
Symptom 2
—
67C3K11
Cause 1
Clogged cooling
water inlet
Clogged cooling
water passages
Incorrectly con-
nected cooling
water hose
Damaged water
pipe or incorrect
installation
Water pump mal- Damaged water
function pump impeller
Water leakage from
water pump hous-
ing
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.
Refer
to
1
page
3-7
3-7
2
7-19
3
6-5
6-5
4
6-5
6-5
5
6-5
6
7
8
9
9-10