Re: [Amel Yacht Owners] Raw water cooling
Bill , I agree , if all the blades are intact one assumes all is good. I had a problem on a previous boat where the plate on the pump behind the impeller wore as well as the cover plate diminishing efficiency .
From: 'Bill & Judy Rouse' yahoogroups@... [amelyachtowners]
To: amelyachtowners <amelyachtowners@...>
Sent: Sat, Apr 1, 2017 9:44 am
Subject: Re: [Amel Yacht Owners] Raw water cooling
When you change the impeller, closely compare the old one to the new one. I believe that you will probably find the same thing I have with wear at the ends of the blades. Once I found what appeared to be a 45° angle cut at the end of used impeller blades, with all of the thickened ends of the blades worn off. It was wear.
I am aware of the rubber separating from the metal hub with low hour impellers which are left in place for over a year. This causes the rubber to slip on the hub, reducing water flow.
I think most of us consider only missing blades as an indication of failure.
CW Bill Rouse
Admiral, Texas Navy
Sent using Google Fi
On Apr 1, 2017 07:56, "Patrick Mcaneny sailw32@... [amelyachtowners]" <amelyachtowners@...> wrote: