Wierd Velvet Drive

Hi folks, my name is Andy and I bought my first 86 Nautique 2001 last year. I ran it all last year with no issues so I am redoing the seats and a couple other cosmetic things now before the summer hits. Now I have a question for you guys, I have a pcm 351 with new heads, and holley carb. I have a had a wied vibration in the boat since I have gotten it at about 1600 rpms. We looked over the tranny, Prop shaft, cutlass bearing, and then I took my prop off, put it on our tire balancer, and found it is way out of balance, and has a small ding in it. I am looking to buy a new prop, but nobody has ever heard of the 1.52:1 transmission I have in my boat. I am not sure if it came new with it, or if somebody swapped it out for a better holeshot, or what. If anyone could give me any info on the prop size that would be outstanding. It currently has a rh 13x13 1 1/8 shaft, and will do only about 33-36 depending on wieght. Thanks, Andy

Yes I can take a pic, What exacly do you want the tranny side or propside, or both

I will get them as soon as i can, Eric was right about the mastercrafts having the 1.52 tranny, I just read about it online, they call it a powerslot I guess and calls for a 14 x 18 4 blade. I'm definitelty confused.

stock prop on the powerslots was 13x18 yes, but you want to tell us what and how you use your boat for, that will determine wich prop is best for you.

We also need to know shaft diameter. I think you want 1.125 with that transmission and a larger wheel attached.

i would imagine the strut wouldve been changed also to accomadate the larger strut bearing, any marking on that would help, engine/transmission pics would help, a swap like that wouldnt be a bad thing, your using the boat as intended, you just need to get more power possibly or more prop???
what does the engine hit at WOT?

time to trade in some of those RPMs for some MPH's, a 466 may be the way to go lol, actually wait around or call Bill Weeks at Acme....someone will get you in the ballpark, need some more pitch I would say...if its a chevy keep her around 4600 on the wot, Ford 4400 on the WOT....5100 may throw a rod on the blue one lol.

Thanks for the help guys, I'll get some pictures tomorrow of the mechanicals, The funny thing is I cant see any signs of a retro-fit at all. Were the 2001's available with this setup? When I bought this boat it had no rear seat, and I asked the gentleman who sold it to me he said I bought the boat in 1990 from the original owner, and he never had a rear seat for it either. It makes me wonder if it was a special package or something

I can add that Bill at Acme is a very helpful guy. The Acme CNC props I have bought have been fantastic. A new prop will make all the difference in the world. Especially the right one! You should go ahead and check the alignment of the driveline while you are deciding on the prop. Do a search on alignment.

My uncle and I are going to align it next weekend. I have to pull the left rear tranny mount off to get a crack fixed, and then we are going to check the alignment.

on the 1.5's alignment is very crucial, its a shorter thicker shaft, (oh boy) and if out will heat up the trans. the transmission is bullet proof, it needs to be dead on with the alignment.