Quote Originally Posted by jim rosenthal View Post
With regard to the seawater pumps on Cummins 6BTA5.9s.... I know you have to remove and support the motor mount on the front to change out the pump, but I had the impression you could change the impeller only, without removing the pump and thus having to take out the motor mount.

There is an aftermarket pump made for Cummins Diamond engines, B and C series, from Seaboard Marine in Oxnard, CA. It is a perfect fit, and each pump comes with a spare impeller and the tool to change it. Basically it is an upgrade in materials and design from the Sherwood pump, which have a bad reputation. It is also cheaper than the Sherwood pump. It is made in South Korea, I think, to a design by Tony Athens from SBMar. I have a set of them on my boat and they have done well for me. Sorry for the thread drift.
Hey Jim,

Tony Athens is the man when it comes to Cummins engines.

Our old boat, sold last summer, had the 6BTAs. They were a repower upgrade from gasoline engines by a previous owner. The mounting plates for the motor mounts obstructed the access to the back of the pump, making it much more difficult to change just the impeller. It's someone else's problem now. Heavily leaning toward Hatteras for the next boat, thanks in large part to the great answers provided on here.