Faults and Fixes
When should the raw water impeller be replaced?
An impeller fails suddenly rather than gradually, and the broken vanes block the heat exchanger — so replacement is done on a schedule rather than on symptoms. Every broken vane must be accounted for when it is changed.
Why it works this way
Impeller condition and the raw water circuit are checked during an engine room survey for exactly this reason: the failure mode gives no warning.
Related services
Serkan Kotel · independent yacht surveyor · IIMS · ABYC · MCA
