Proost schreef :
Waarom zou je een impeller niet langer gebruiken?
De verleiding is inderdaad groot om de impeller niet jaarlijks te vervangen en langer te gebruiken. In het laatste Yanmar maintenance voorschrift staat dat ook :
4.3.5 Inspection Every 600 Hrs (or 1x/year)
Inspecting Inner Parts of the Seawater Pump
Depending on the use, the inside parts of the seawater pump deteriorate and discharge performance drops. At the specified interval or when the volume of seawater discharged is reduced, inspect the seawater pump in accordance with the following procedures:
1. Loosen the side cover set bolts and remove the side cover.
2. Illuminate the inside of the seawater pump with a flashlight and inspect.
3. If any of the following problems is found, disassembly and maintenance are necessary:
a) Impeller blades are cracked or nicked. Edges or surfaces of the blades are marred or scratched.
Note: The impeller must be replaced periodically (every 1000 hrs.).
b) Pump body is damaged.