Join Date: Oct 2014
Location: Wilmington, NC
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Cooling system water not flowing
Ok Sailnet Gurus - another question for you.
Last time I had my 1981 Tartan 33 out, just as I was backing into the slip and tying up, I noticed no water was coming out the exhaust. Engine temp was still OK so something must have just happened. I took the water pump off and the old impeller had lost a blade and wasn't turning, so I replaced the impeller and re-installed the pump. Did a check of other hoses, connections etc. Started it up, and no flow...
Here's what I've checked:
The through-hull with valve seems to be working. When I remove the hose and open the valve, sea water flows in freely.
The hose is clear - no obstructions (there is a loop, as in the pic, but it has worked fine about 40 hours of motoring since I got the boat - figure the loop was to avoid any sharp angles in the hose given how it is routed to the pump). Also, the hose doesn't appear to have any leaks (even for air, I blew into one end blocking the other and didn't seem to leak). check).
The impeller spins - I briefly started the engine with the cover off the pump (hoses weren't attached of course) and it was turning fine.
Priming? Didn't know if this would make a difference, so I filled the intake hose (through hull to pump) as much as I could from the water pump side.
Since everything seems to be in working order, but still no water is being pulled into the impeller (it remains dry) wondering if there's something I'm not thinking about? Again, it was in perfect working order, and I replaced the impeller (and gaskets of course).
Looking forward to your insight!
Last edited by Silverton10; 08-22-2015 at 07:35 PM.