Since you are able to get some pumping action when using the drill I would concentrate on the water supply or discharge side of the pump or something wrong with the impellor key-way. It would have to be a significant gasket or cover problem to let enough water bypassing to cause a total discharge failure issue into the engine - although there might be something constraining the impellor but you've proved to yourself with the drill that it is capable.
I usually have to raise the antifreeze level ( from my bucket with hose ) to above the waterline to get it all starting smoothly and reasonably rapidly during the winterization - once started it pumps at capacity. Adding the antifreeze through the raw water strainer works OK but I wasted the antifreeze trying to keep the water level near the top ... wasting a bunch down the bilge. The bucket/hose method feeds into the hose disconnected from the strainer then flows to the pump. Can get a couple of gallons through in less 30 seconds or so. Ed Prime Interest C&C 38 LF Toronto, Canada QCYC -----Original Message----- From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Bill Connon Sent: Tuesday, October 22, 2013 2:48 PM To: cnc-list@cnc-list.com Subject: Stus-List Part numbers for 3GMF seawater pump Group, On haulout this year I noticed water drops from the seawater pump. I changed the bearings and seal and afterwards the pump would no longer self prime. I changed the impeller and was able to pump water using a 600 RPM half inch drill but the boat motor would not self prime and pump anti-freeze through the system. I want to buy a new cover, gasket and cam but can't come up with the proper part numbers. A call to the nearest Yanmar dealer did not help but I assume that it is a Johnson pump ( from what I found on the web ) and it was using a Johnson 827 impeller. The motor is a 3GMF from 1985and the impeller is 2" OD x 7/8" wide and has a 1/2" bore with a keyway. All help with getting the proper part numbers would be appreciated. Bill Caprice 1 1978 C&C 36 _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com
