[C38] Changed seawater pump impeller fail

Pierre Patino pierre.patino at gmail.com
Tue Mar 2 00:55:57 EST 2021

OK. Now I'm in the completely perplexed phase.

I removed the outlet hose from the raw sea water pump. I could blow into
the hose. Furthermore, I rigged a connector and was able to push fresh
water through the system with a garden hose. Water came out of the boat's
exhaust just fine.

I hooked up another hose to the outlet of the raw sea water pump. I placed
the other end into a bucket. I started the engine and seawater came out
into the bucket. Plenty of it.

Then I reconnected the outlet hose to the pump again. I started the engine.
Water and exhaust came out of the exhaust hole for a while and then.... no

So I'm now wondering how to proceed. Is it time to look up the specs of the
pump and get a pressure gauge? Am I missing something obvious?


On Mon, Feb 8, 2021 at 6:43 PM Pierre Patino <pierre.patino at gmail.com>

> Hello All
> As the subject implies, I failed to do this properly I believe. I bought
> the replacement impeller parts and removed the old one. Removing the old
> impeller was easy. I cleaned the cavity (there was some salt buildup, my
> fault for waiting too long)  and when I proceeded to put the new impeller
> (looks exactly like the old one), I was unable to put the snap ring back.
> I'm not sure how important this is. In any case, I put the cover on with
> the new o-ring and started the engine.
> Now I notice zero water coming out the exhaust. I feel something's
> buggered up and I'm not quite sure what the fastest way to troubleshoot is.
> Suggestions?
> By the way, the intake valve is open so I know it's not *that *operator
> error.
> I've made sure the impeller spins by running the engine and checking that
> the shaft has rotated as well as the impeller (taking the cover off and
> putting it back on).
> Just before I started on this project, water did come out of the exhaust
> so I know it "used" to work.
> I'm perplexed why I'm having such a hard time with the snap ring. I just
> did not want to try jam it in with excessive force. The last time I did
> this I had no trouble. Maybe I need to get yet another impeller kit?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://catalina38.org/pipermail/listserve_catalina38.org/attachments/20210301/41f92863/attachment-0001.htm>

More information about the Listserve mailing list