Parting out another 80 model Nautique

TX Wind wrote: TRBenj wrote: That 13x14 would not be ideal for any Ski Nautique with a common powertrain, save for possibly the 80's 2001's with the 454/1:1 combo. What boat are you looking to put it on? I would agree for the most part Tim unless he has upgraded his power. We upgraded the power on my Mastercraft about 20H.P. and a 13x14 or a 13x15 would be nice. I'm taching out a little high. Unfortunately the MC is a LH rotation boat or I would be keeping this for myself.

In my experience, power upgrades seldom require prop size changes. Top end modifications tend to push the hp peak to the right, as well as up- so most boats run best with stock sized props (simply spun at higher RPM's). The 2 exceptions Ive seen to this rule are when you get into wilder modifications (>1hp/ci) and when you add displacement (stroker), both of which may require larger props to keep the revs in check.

PM replied on the rudder!

If the powertrain makes power up to 5100rpm, then let it spin!

That being said, if it feels like youre getting prop slip (increased revs with no increased speed) and are only capable of pulling a barefooter 42mph at those revs, then I would say youre right... which means your prop is probably junk. A properly sized prop in new condition (preferably a modern CNC) would get you back to where you need to be- most likely in the stock (or stock equivalent) size.

Its all about matching WOT RPM to your engine's powerband. Increasing prop size is NOT a foregone conclusion when adding hp- in fact, doing so will usually harm performance. There is usually no need to sacrifice anything (holeshot included) when adding hp.

Yeah Tim, it's one of those nagging questions. I've actually considered a 14x13 or a 14x14. That may reduce top end slip without much problem on the lower end. Those MC hulls have plenty of room for it. In the mean time, it makes interesting discussion and as you know from experience the best way to tell what prop is best is by trial and error. The engine we upgraded with is supposed to make more peak h.p. at the same rpm as the old one. But like you said, if I can make power to 5100, I'm gonna.

TX Wind wrote: Yeah Tim, it's one of those nagging questions. I've actually considered a 14x13 or a 14x14. That may reduce top end slip without much problem on the lower end. Those MC hulls have plenty of room for it. In the mean time, it makes interesting discussion and as you know from experience the best way to tell what prop is best is by trial and error. The engine we upgraded with is supposed to make more peak h.p. at the same rpm as the old one. But like you said, if I can make power to 5100, I'm gonna.

We should probably start this discussion from scratch instead of cluttering up this for sale thread... but if I read you correctly, you only added 20hp over stock? That kind of hp increase would not cause prop slip- but a junk prop would. Assuming we're talking a 1:1, try a known good prop (like an Acme 541 if a LH small block 1:1 with 1" shaft) and performance should improve a good bit. Lots of other variables to consider besides diameter and pitch- so changing from a junk 13x13 to a junk 13x14 still isnt going to get you to where you want to go.

Im skeptical that you found a way to make more power through breathing improvements that didnt also move the powerband to the right, btw.

Jeff,
I like the looks of the Airguide and would also consider buying the Tach, hour meter and Voltmeter (if it is there!!). Let me know if they all work or what you think the condition is.   Email me with a price for all, to Todd Benjamin, @ pyramidguy1@hotmail.com. I'm in Scotia, New york 12302

Thanks, Todd

Here are the tranny mounts for John. Is this the type you're looking for?

Wayne,

It is most likely a 13x13. The one I have is a 13x14. It could be reworked and re-pitched if you wanted to send it in. They will usually cup them for you as well which seems to help.

75 is fine on the rub-rail. Shipping should run 15.45. You can send money by Paypal. My email is txwind@live.com.

Wayne, I have an OJ 13 / 13 RH in decent shape, needs a general service but not beat up. Ill barter for it.
What do you have?

Cass,
I suggest going with one of the new CNC machined props. The Acme 540 would be my first choice but it also depends on how you use the boat. Fill us in.

It sure sounds like someone didn't put that prop on correctly!! Whatever you end up getting, take a look at proper prop installation

No Thanks, im having mine reconditioned.

TX Wind wrote: Something wrong with that link Pete. LOL...my for sale listing is determined to turn into a prop discussion.

fixed link Sorry for the high jack!

Jeff,

Check is in the mail for the Airguide and other gauges.

Thanks, Todd

The mounts arrived last week. Thanks.

hello is it an 80 or 81.i need starboard upper side glass plus hardware.for an 81 ski nautique anniversary,thanks dan 330 524-6983

A little more research and I think I misread the date code on this Nautique. I forgot that they changed the coding in 1984. The last for digits of the HIN are M80E. I believe that makes this an 81 model and judging from the brochures in the reference, it appears to be a Classic by looking at the gauge cluster. There is no interior in this boat save for the motor cover box.

Here are some pics of the transom and swim deck. It's in pretty fair shape for its age. Definitely worth saving. Should clean up pretty well. As for whether or not they will work on the 77 Tique, my guess is that the brackets are essentially the same. However the beam on the Nautique is about 6" wider I believe.

Tim is the man that would know. Any word on that Tim? I hope you received your rudder by the way. Pulling the gauges for your uncle Todd is my theme of the day.