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. DaveSent 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 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.
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