If it from the shaft, you must replace the bushing.Usually from age or can be a result of over tightening the belt.
-------- Original message -------- From: "Della Barba, Joe via CnC-List" <cnc-list@cnc-list.com> Date: 08-25-2016 7:52 AM (GMT-08:00) To: "'cnc-list@cnc-list.com'" <cnc-list@cnc-list.com> Cc: "Della Barba, Joe" <joe.della.ba...@ssa.gov>, kelly petew <kellype...@msn.com> Subject: Re: Stus-List Yanmar 2gm20f - raw H2O pump issue What part of the pump is leaking? They usually have a seal/gasket at one end where you replace the impellor and another at the other end where the shaft comes in. Joe Coquina From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of kelly petew via CnC-List Sent: Thursday, August 25, 2016 10:44 AM To: cnc-list Cc: kelly petew Subject: Stus-List Yanmar 2gm20f - raw H2O pump issue Recently, I discovered my raw water pump was leaking during engine operation. So, I replaced the impeller [old one looked perfect after extraction] and the "O" ring seal. After renewal of impeller and "O" ring, I ran engine about 2 to 3 hours, and no leakage was observed. However, yesterday, it was leaking at about 10 to 20 drips per minute while motoring. Are these pumps similar to an automobile water pump? That is, when the auto pump's bearing fails, it starts to leak? Is the leakage telling me that I have a bad bearing in this pump?? Thanks, Pete W. Siren Song '91 C&C30-2 Deltaville, Va.
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