Tom: Look for an axial gap between the pump impeller and the pump. The sides of the impeller need to contact the rear of the pump as well as the cover. Too much wear or too thick of a cover gasket will drop the pump flow to near zero.
A vented loop on the intake side can cause no flow, a vented loop between the block and the mixing elbow won't be the problem. The water inlet on the mixing elbow can definitely clog up. Excessive restriction in the exhaust can block flow, especially if there's black smoke as well. Eric On Mon, Feb 3, 2020 at 7:55 PM Garry Cross via CnC-List < [email protected]> wrote: > Just a thought. > Disconnect the belt from the water pump. > Undo the drain valve from the water muffler. > Run the pump with a drill and socket as you disconnect hoses. > Disconnect hoses as suggested by another lister. I would start at the > mixing elbow. > Find the fault zone and go from there. > If you get water out the hose connected to the mixing elbow, then you know > what to do next. > If not divide and conquer. > > I use this method to fill my heat exchanger with anti freeze and watch the > drain for antifreeze to come out. > > > From: Tom Buscaglia <[email protected]> >> To: [email protected] >> Cc: >> Bcc: >> Date: Sun, 2 Feb 2020 11:06:27 -0800 >> Subject: Stus-List Raw water blockage >> I have checked the intake, pump, strainer, heat exchanger, mixing elbow. >> All are clear, elbow is new. Still, no water out exhaust. >> >> I am wondering if the vented loop between the heat exchanger and mixing >> elbow could be the culprit. It is even necessary on my boat? Seems that >> the elbow is well above the water line and the loop could be bypassed. >> >> The only other possibility is the hoses on the suction side of the >> system collapsing on the inside...but that still seems unlikely. >> >> Thoughts appreciated. >> >> Tom Buscaglia >> S/V Alera >> 1990 C&C 37+/40 >> Vashon WA >> P 206.463.9200 >> C 305.409.3660 >> > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
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