I once replaced the impeller on my yanmar 3gm30 and when I put the plate back on the pump it was not seated properly and the pump kept losing its prime. With enough rpm s it would start pumping again only to lose its prime again on start up. Might be worth checking. The plate must be air/water tight. Gary KolcLiberty38' Mk 2
Sent from my Verizon, Samsung Galaxy Tablet -------- Original message --------From: Josh Muckley via CnC-List <cnc-list@cnc-list.com> Date: 5/30/18 4:43 PM (GMT-05:00) To: cnc-list@cnc-list.com Cc: Josh Muckley <muckl...@gmail.com> Subject: Re: Stus-List problem getting the raw water flowing I've had the tips of the impeller vanes wear off and combined with the set which the vanes had taken the pump was unable to generate enough force to both suck and blow unless I reved the engine. This condition didn't cause any perceivable problems until I was attempting to winterize and the level in the jug just wouldn't go down. If you haven't replaced the impeller lately. Replace the impeller and get back to us. Josh Muckley S/V Sea Hawk 1989 C&C 37+Solomons, MD On Wed, May 30, 2018, 1:47 PM Eric Frank via CnC-List <cnc-list@cnc-list.com> wrote: Never had trouble with this before, but this year I could not get the raw water going out the exhaust when I was getting ready for launching. Always use a bucket of fresh water on the intake to the raw water pump (new impeller every year) just to make sure things are working. Engine started fine but no water out the exhaust. Impeller was turning when I cranked the engine so thought the problem might be downstream of that. A mechanic at the yard reported back that things were fine and he just had to run the engine at a high RPM to get the raw water flowing. Anyone else experience that? Does it suggest that the tubes where the raw water cools the engine water could be getting clogged? Advice appreciated. Eric Frank Cat's Paw C&C 35 Mk II Mattapoisett, MA _______________________________________________ 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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