merc's Hustler porps

[rtwills]

I experienced a problem I was wondering if any of you have had.I have a 125 Merc with the Hustler prop in a 21 pitch and one at a 23 pitch.while cruising last week at about 50 (deep water no rocks) my boat rpm's kicked up and the whole boat shook.I raised the motor to notice 1 fin snapped off of the prop.I replaced it with the 23 and continued on.Two days later the same thing happened to my brand new spare prop , and the break was almost exactly the same.I heard these were rated to 65+mph and none of the dealers are of any help to me.I appreciate any comments on this prop that you can give me.
Thanks , Ron

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If people weren't supposed to eat animals.

why are they made out of meat??

[minnesota mac]

MY dad had the same problem with his 115merc. He had a 4 blade al propco on it. The prop was at least 5 years old and the motor had a lot of hours on it. The boat stated shaking going down the lake. If your props are new I would contact mecuary about this, maybe they know they have a problem and they will work with you