Water Pump Housing Inspection; Impeller And Insert Cartridge Inspection; Water Pump Installation - Yamaha F4 Service Manual

LOWR
6
WATER PUMP
5
3
4
2
1
SERVICE POINTS

Water pump housing inspection

1. Inspect:
9 Water pump housing
9 Outer plate cartridge
Crack/Twist/Scratch/Damage
2. Inspect:
9 Plate
Crack/Twist/Scratch/Damage

Impeller and insert cartridge inspection

1. Inspect:
9 Impeller
9 Insert cartridge
Crack/Distortion/Burning/Damage

Water pump installation

NOTE:
9When removing or installing the impeller,
apply a thin coat of water resistant grease
to the entire surface of the drive shaft.
9Apply the grease to the impeller blades,
insert cartridge inner surface.
9Be sure to turn the drive shaft clockwise,
otherwise the impeller blade will be twist-
ed the other way. thus reducing pump
performance.
1. Install:
Dowel pin 1 (drive shaft)
9
Impeller 2
9
Water pump housing 3 with insert
9
cartridge 4
Plate 5
9
Bolt 6
9
6-6
E
® Replace.
® Replace.
® Replace.