I have a 1968 Commander 42. Today i notice the port exhaust was steaming at low RPM. I decided to return to my slip. My gauge read 180 degrees, but my laser gun read 198 at the risers and manifold. I think it is the impeller. Does anyone has a diagram? and pointers to replace it. I checked the belts and seem ok. I just replaced the seacocks and hoses. I want to see if it is a do it yourself project or how much does it cost for this repair work? Thanks in advance


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There are two impellers, provided you have open cooling. Yes you can do them both. Raw water imp is Sherwood number 10615 k. Circulating pump  number I don't have. do some research on here about the circulating pump, as to how to remove the sheave and you will be just fine. The cir pump impeller number should be in here somewhere as well.

Thanks Mark!

Candido - search “427 impeller” (without the quotes) in the search bar and two helpful posts will come-up. The first is a step by step I posted not long ago:


Another one that will come up is this one that will give you the part number you need to order for the proper gasket that no longer comes in the kit with the impeller:


dont forget to change the little cam thing in there too

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