Greetings: I have a power cat build in France
. The prop zincs need to be replaced. I don't know the specific model (i.e. F, G, H, etc) that I need. I measured the inside diameter of the zinc and it was 2 1/2 inches. All the info I have found has the shaft size and the OD but not the inside diameter. I have already bought 2 sizes, one was too small and the other was too big. I am having a hard time getting anyone in the industry to measure their prop zinc and tell me what the ID is. An H model is too big. That leaves the F or G to consider. Since zincs are not inexpensive I am trying to get accurate info before ordering again. Please don't tell me to measure the shaft size, etc. I am not at my boat and can't get that info. I just need a zinc that will fit over the nut and 2 1/2 inch will do that. This does not seem to be rocket science to me. The base of the zinc is a circle so measure from inside edge of one side of the circle to the other. So I don't know why I am having so much trouble getting the info. Does anyone know which zinc has a 2 1/2 inch inside diameter?