Transmission making a new "whirrr" sound

Steve,
If the only thing that has changed is the prop, then I'd have to say it's the issue. What prop was on it before? I can't find the thread I posted regarding my bad experience with an Acme 540 on my Tique. The vibration and noise it made caused me to put the OJ back on the boat! In that tread it came up that Reid had a similar issue with an Acme.

Pete that's not a vibration noise that's the sound of performance.
I have both the 540 on my '85 and the 1442 on my '95 and love them, smooth as silk.
Quinner even commented on the hole shot on my '95 when Kirk yanked him a$$ over curly locks last summer

[QUOTE=TRBenj] Oh for gods sake Pete, Im not sure if you were of your meds that day or only the days you bring it up again! Running a too-large prop on a hollow boat might have been your problem, or maybe your son bent your driveshaft and you only noticed it with a smooth prop (like Vic recently)? Either way, the strange harmonics or vibration you experienced is not indicative of a widespread Acme "issue" as you seem to be implying! It also has next to no bearing on how the wildly popular 2001 + 540 combo works.

The 3-blade acmes can sometimes be described as making a "chugging" noise, but I've really only noticed it on the 1.23 boats- 1:1's seem silent to me. Either way, they're still buttery smooth. I'm not certain that I'd point the finger at the prop first, but since it's the one thing that's changed, it's at least worth ruling out if nothing else obvious is to blame. Throw another prop on and see what happens.[/QUOTE

Yeah Tim. The vibrations are history. I have 1/2" hull to prop clearance the acme is a little noisier but so is a cammed small block making mad horsepower! I think my hollow hull and tight hull to prop clearance is my issue. Ill deal this acme is awesome. Will be buying another for my recent engine swap. I will be dropping back down from 12 1/2" dia to 12" though. The prop clearance is my fault as my engine is sitting lower in the hull than it was before stringer work.

gun-driver wrote: Pete that's not a vibration noise that's the sound of performance. Quinner even commented on the hole shot on my '95 when Kirk yanked him a$$ over curly locks last summer

LMAO. You paint a very vivid picture.

No noise for me under operation but it does make the noise on deceleration. The deceleration noise is the same in modern 196 and 200s I have driven. Sounds kind of cool actually. If anything my OJ makes more noise at speed but is also smooth as butter.

That's interesting,I can't hear much when I'm driving the 'Stang let alone speedo"s and prop noise

thanks for all of the replies.

You can only hear the noise at idle when you put the boat in gear. Prior to making the prop change, I had and still have a "whirr" that persists at speed. This "whirr" at idle/just in gear is new. I suspected that the existing "whirr" could be a strut bearing in need of replacement, but the shaft seems to be aligned properly and there is no play at all in the shaft at the strut so I'm gonna let it ride and go skiing.

thanks again all.