Join Date: Aug 2003
Location: Long Island, NY
Thanked 81 Times in 76 Posts
Rep Power: 14
I don't have a scheduled replacement time. I check it in the spring and if it looks Ok I leave it alone. It is very easy for me to access the impeller, and i have spares, so changing it at any time is not difficult.
BTW, last spring I removed the impeller and inspected it. I saw the vanes were cracked at the root. I replaced with a new one. In July I had reduced flow from the exhaust. I removed the pump cover to find that on my 3 month old impeller, 2 vanes were missing and 2 more were cracked. The next impeller I installed was a Globe, made of different material.
Since it seems (to me anyway) that a new impeller is just as likely to fail as an older one, I don't see the benefit of changing every year (or every other year).
Lastly, I usually put about 50 hours on the diesel each year.
Deep Blue C, 2002 C&C 110
Mt. Sinai, NY
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