Checking The Water Pump - Yamaha F30B 2018 Service Manual

Checking the water pump

1. Check:
• Water pump housing
Deformed  Replace.
TIP:
If the engine overheats, the inside of the water
pump housing may be deformed.
Therefore, make sure to remove the insert car-
tridge when checking the water pump housing.
2. Check:
• Impeller
• Insert cartridge
• Outer plate cartridge
Cracked/worn  Replace.
• Impeller key
• Keyway in the drive shaft
Deformed/worn  Replace.
8-4
Water pump