Ken,
I can't say specifically for your boat, but for mine with the 1" shaft, my shaft log is 1-5/8". I purchased the 02-100-112 seal that fits either a 1 1/2" or 1-5/8" log. The rubber bellows has a rubber adapter ring inside that you pop out if it is the larger size.
I know it is difficult to measure the diameter of the log. There was just enough exposed between the rubber hose that I could wrap a narrow strip of paper (because it won't stretch) around it and mark the paper with a pencil where it over lapped. Then flatten it out and measure the distance between the two marks, divide by 3.1415 and there is your diameter.
I have had this seal for more than 10 years (replaced once as a maintenance precaution) and am completely satisfied. I would also suggest buying the split coupling as well from the same supplier. Getting the coupling off the shaft was for me extremely difficult. Now with the split coupling it should never be difficult again.