[C38] Spinning water pump shaft and no spinning impeller

Max soto maxsoto at gmail.com
Thu Feb 3 15:18:42 EST 2022

Hi Pierre, sounds to me like it was just a bad impeller…   That might also happens if the pump is dry…
Years ago I replaced my impeller just for maintenance, and half an hour later noticed some white smoke on the exhaust and no water was coming out. Checked the impeller and there wasn’t a single blade attached. Was totally destroyed. So… it happens 🤷🏻‍♂️
Max Soto A.
Alajuela, Costa Rica

> On Feb 3, 2022, at 12:12, Pierre Patino <pierre.patino at gmail.com> wrote:
> Hi All
> Five months ago I replaced the raw water pump and when I turned on the engine after a couple of months of inactivity I noticed that no water was coming out of the exhaust port.
> I concluded that the new impeller was not spinning.
> I opened up the pump cover and saw that the shaft was indeed spinning but not the impeller.
> I replaced the impeller with an older one  that I had saved from a previous maintenance and this worked.
> Barring a manufacturing defect on the impeller's central keyed ring, what else could be wrong? The pump shaft looks OK (visually).
> The impellers are not cheap for some reason.
> Thanks for your suggestions.
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