Is there a check valve in the line before the water pump? Could hose be old and collapsing?
Joel On Thu, Jun 5, 2025 at 4:42 PM David Knecht via CnC-List < cnc-list@cnc-list.com> wrote: > Update. Diver confirmed nothing blocking thru hull. So with seacock open > water flows strongly out of strainer with lid removed. But it dribbles > slowly out of raw water pump inlet hose. The only thing in between is raw > water strainer. Basket is clean. Not sure how to assess water flow through > it but suppose i will have to remove it. Major inaccessible pita. Dave > > Sent from my iPhone > > On Jun 5, 2025, at 1:44 PM, John Irvin <skis...@outlook.com> wrote: > > > It’s more likely to suck air and not pump. > > > Get Outlook for iOS <https://aka.ms/o0ukef> > ------------------------------ > *From:* David Knecht via CnC-List <cnc-list@cnc-list.com> > *Sent:* Thursday, June 5, 2025 1:13:24 PM > *To:* Stus-List <cnc-list@cnc-list.com> > *Cc:* David Knecht <davidakne...@gmail.com> > *Subject:* Stus-List Re: Water pump mystery > > Fyi. I am on my mooring so some ideas aren’t practical. Dave > > Sent from my iPhone > > On Jun 5, 2025, at 1:09 PM, David Knecht <davidakne...@gmail.com> wrote: > > Hi john. Wouldn’t the pump be leaking water if seal is bad? Dave > > Sent from my iPhone > > On Jun 5, 2025, at 12:49 PM, John Irvin via CnC-List < > cnc-list@cnc-list.com> wrote: > > > Impeller gasket must make a perfect seal. > > Get Outlook for iOS <https://aka.ms/o0ukef> > ------------------------------ > *From:* ALAN BERGEN via CnC-List <cnc-list@cnc-list.com> > *Sent:* Thursday, June 5, 2025 12:46:37 PM > *To:* Stus-List <cnc-list@cnc-list.com> > *Cc:* ALAN BERGEN <trya...@alumni.usc.edu> > *Subject:* Stus-List Re: Water pump mystery > > Air might be getting in without water leaking. It happened to me once, and > it took me a while to figure it out. > > Alan > > > On Thu, Jun 5, 2025 at 9:00 AM David Knecht via CnC-List < > cnc-list@cnc-list.com> wrote: > > Hi alan. Wont it leak water if seal is not tight? I have new gaskets on > order but figured if it didn’t leak i was ok for now. Dave > Sent from my iPhone > > On Jun 5, 2025, at 11:39 AM, ALAN BERGEN via CnC-List < > cnc-list@cnc-list.com> wrote: > > > If the cap on the raw water strainer doesn't have a tight seal, you won't > get water pumping. > > Alan > > > On Thu, Jun 5, 2025 at 8:31 AM David Knecht via CnC-List < > cnc-list@cnc-list.com> wrote: > > Eliminated many possibilities yesterday. Pump shaft turning fine. Replaced > impeller. Still not pumping water. Has anyone had a priming problem? My > current hypothesis is that either the pump is not self priming or the > seacock is partially plugged limiting flow. Water comes into raw water > strainer with lid off but no idea if it is normal rate or not. Dave > > Sent from my iPhone > > On May 30, 2025, at 9:39 PM, Ronald Scott via CnC-List < > cnc-list@cnc-list.com> wrote: > > Possibly the impeller connection to the sea water pump pulley became > disconnected…resulting in the impeller not being turned to pump properly > the sea water. This happened to me when I had installed both a new > seawater pump and a new impeller. The guy doing the installation made the > connection better between the impeller and the sea water pump pulley, and > normal pumping of water resumed out the stern. He did say that the pulley > was somewhat worn (where it connects with the impeller), and suggested I > install a new pulley. Hope this helps! > Ron Scott > C&C 35 MK II (Rapid Transit) > Drayden, MD > Danville, Ky > Sent from my iPhone > > On May 30, 2025, at 3:51 PM, ALAN BERGEN via CnC-List < > cnc-list@cnc-list.com> wrote: > > > Is the belt tight enough? Run the engine and see whether the pump is > turning. If not, tighten the belt. If yes, remove the exit hose from the > pump and see whether water comes out when the engine is running and the > pump is turning. If no water comes out, change the impeller. > > Alan Bergen > 35 Mk III Thirsty > Rose City YC > Portland, OR > > > On Fri, May 30, 2025 at 12:34 PM David Knecht via CnC-List < > cnc-list@cnc-list.com> wrote: > > I noticed today when i turned the engine on that i could not hear water > coming out the transom port. Just air bubbles. Also the temp gauge read > zero which i am guessing would happen with no water near sensor. Opened > intake strainer cap and water comes in when seacock is opened. Took cover > off sherwood water pump and looks normal inside. No missing vanes. Opened > seacock and water came out of hose from the intake. I’m stuck. Any ideas? > C&c 34+ > Universal m4-30 > Thanks. > > Your contributions help pay the fees associated with this list and help to > keep it active. Please help by making a small contribution using PayPal > at: > https://urldefense.com/v3/__https://www.paypal.com/paypalme/stumurray__;!!LIr3w8kk_Xxm!pZPXqf0N06PSxGS6nGO9KrBafHmmNbAHvV1qXeoJBQtWUzsqpX0o7OHRecZKK1B_ilJoRZ2G7haKXPI9iCONU2g$ > All contributions are greatly appreciated. > > Your contributions help pay the fees associated with this list and help to > keep it active. Please help by making a small contribution using PayPal > at: https://www.paypal.com/paypalme/stumurray > <https://urldefense.com/v3/__https://www.paypal.com/paypalme/stumurray__;!!LIr3w8kk_Xxm!qDCB107FV545ldgV0tlZsQBNKnpSYz9z0E9zQPRdIsNRWQRwwuSzb6re2jDKQW-KijaHYMyaCaM47J4ZkqHtOaQ$> > All contributions are greatly appreciated. > > Your contributions help pay the fees associated with this list and help to > keep it active. Please help by making a small contribution using PayPal > at: > https://urldefense.com/v3/__https://www.paypal.com/paypalme/stumurray__;!!LIr3w8kk_Xxm!qDCB107FV545ldgV0tlZsQBNKnpSYz9z0E9zQPRdIsNRWQRwwuSzb6re2jDKQW-KijaHYMyaCaM47J4ZkqHtOaQ$ > All contributions are greatly appreciated. > > Your contributions help pay the fees associated with this list and help to > keep it active. Please help by making a small contribution using PayPal > at: https://www.paypal.com/paypalme/stumurray All contributions are > greatly appreciated. > > Your contributions help pay the fees associated with this list and help to > keep it active. Please help by making a small contribution using PayPal > at: https://www.paypal.com/paypalme/stumurray All contributions are > greatly appreciated.
Your contributions help pay the fees associated with this list and help to keep it active. Please help by making a small contribution using PayPal at: https://www.paypal.com/paypalme/stumurray All contributions are greatly appreciated.
