[C320-list] Slow Leak From SeaWater Pump

[Joe Geiger]

Thanks for the advice.  I ordered a rebuild kit for the pump so I think I’ll attempt rebuilding it and see if that fixes the problem. 

Joe
--
Joe Geiger
“Vega” Hull #722
Greenwich Cove, RI




> On Jul 25, 2019, at 7:15 PM, mmellon <mmellon at cruzio.com> wrote:
> 
> 
> 
> Hello, Joe. I recently experienced a similar or identical problem on my 1996 boat #324, which has a Westerbeke 30b engine with a 33606 Johnson raw water pump. If the problem is not due to the impeller cover, then it is likely a seal. These pumps have two seals, one oil seal on the shaft closest to the engine, and one water seal on the shaft closer to the impeller. In my case, the water seal apparently failed.  The problem leak could also be the result of a damaged shaft.  Seals and shafts are available and also a rebuild kit that also includes the shaft and bearings, about $210. A new pump is about $480 (with supposedly improved seals).If you have a different engine,  you may have a different brand of pump (Oberdorfer, etc) but the basic design is very similar.Best regards,Mike Mellon La Vida Sent from my Verizon Wireless 4G LTE smartphone
> 
> -------- Original message --------
> From: Joe Geiger <joe.geiger at gmail.com> 
> Date: 07/25/2019  3:50 PM  (GMT-08:00) 
> To: C320-List at Catalina320.com 
> Subject: [C320-list] Slow Leak From SeaWater Pump 
> 
> When I bought the boat back in October, the captain that did my survey told me he noticed a drip from the raw water pump as we were motoring. I have since replaced the impeller, the impeller cover, the seal washer that goes on the inside of the impeller, the O ring and the hose that goes from the raw water pump to the heat exchanger. I also used a silicone sealant around the O ring before tightening the impeller cover plate. It still drips. :|The pump cools the engine just fine so it’s not a pressing issue. Any ideas on what else I might replace or check?Joe--Joe Geiger“Vega” #722Greenwich Cove, RI