[reelapeelin]

Joker, I agree w/Ferm about raising two notches...I wouldn't worry about the gap you'll create by raising it...

Although I have advocated using large diameter props for these boats, I also know that while it worked on mine, it may not be best for all...first, raise the motor and see what difference(s) that alone makes...if yer still hearing the rattle and sure the noise comes from the lower, you might try a smaller dia prop...try to make only ONE change at a time...that way yer not scratchin' yer head over WHICH change made the difference...

Hope yer not losing any lower unit oil...have you pressure tested it?...

Rattling on those motors (I had one) is often due to the magnets under the flywheel coming loose...knowing sometimes it's hard to isolate noise, could it be coming from up top?...just thinkin' out loud...