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.
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