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I replaced my cutless bearing this spring. I tried a half dozen pullers, broke three and still couldn't get the prop off...heat...pbblaster...etc...all tried to no avail. Luckily it was a two blade and I cheated it out past my rudder with no room to spare. I took everything to a marine machine shop which straightened the shaft and balanced the shaft and prop as a rotating assembly. Given the cost, it probably would have been cheaper to go with a new shaft, but even though the prop looked good, who knows? What I do know is that the job is a PITA and it is worth spending the time and money to do it right the first time.
Regarding your Martec. I strongly suggest you contact them directly on proper removal. I checked their site, but there is precious little detail on it regarding removal and the installation instructions don't make sense to me as I don't have the prop in front of me.
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