Prop swap question

[desertskier]

Yes, the quoted portion of my post is between the two quotation marks.

Here's another one:

" You do two kinds of maintenance on a boat: Preventive or Disaster Recovery. Pick one.

-Charles "

[Quinner]

Scott, shaft breaks do happen even on direct drives, with the cost of a possible tow in and a new prop and shaft as a result it sure seems like time/money well spent to ensure your prop is lapped on. Like alignment, not many people check that either but it does not mean that is ok

LOL, nice quote desert

[gary s]

If everyone took the attitude of well thats good enough Nautiques would be Bayliners......

[charlesml3]

Nautique has warrantied out quite a few drive shafts (and usually props at the same time). With parts and labor, this has to be costing them $1500 per incident. I really cannot believe that if they even thought lapping the prop onto the shaft would help they'd have been doing this years ago. There would be service bulletins sent to dealers to have them perform this task on boats coming in. None of that has happened.

Again, I'm not saying there's anything WRONG with this. If you want to do it because it makes you feel better or whatever, feel free. I just do not see any benefit. It won't make anything work any better. Unless someone comes up with some kind of reasoned, compelling argument I'm going to chalk this one up to another Planetnautique myth.

-Charles

[functionoverfashion]

It won't make anything work any better. Unless someone comes up with some kind of reasoned, compelling argument I'm going to chalk this one up to another Planetnautique myth.

-Charles

My feeling on this subject is summed up on this page belonging to a propeller manufacturer: "It is good practice to "lap" the propeller to the shaft. It only takes a few minutes and will improve the fit."

There are plenty of examples of such things that aren't strictly necessary for a part to function, but that doesn't change the fact that it should be done a certain way for the best possible result. Closely following torque values, in most cases, could fall into that category, too. These are things that aren't done to make someone feel better, but because there is an actual mechanical reason. The mechanical reason for lapping a prop, I don't think is being questioned here; unless I missed something.

To each their own.

[scottb7]

"for the best possible result". Yeah, my wife said don't eat so much cake, your gonna get sick, and fat. I was like, "yeah, i will fit in the coffin, whatever."

but gotta say if quinner thinks i should consider, then i gotta consider. i will watch a couple videos tonight....easy enough to do in driveway before i put boat in the water this season.

if i had a buck for every time someone on this forum over maintained their boat i would be able to retire early...

p.s. i would not throw "shade" on bayliner. that is just wrong. not everyone can afford a nautique. i bet i would see eye to eye and get along better with a larger % of bayliner owners then nautique owners. but that is just me.

[functionoverfashion]

if i had a buck for every time someone on this forum over maintained their boat i would be able to retire early...

That's certainly true. You have to decide which of the crazy things you're going to do, and which you can skip. Very few people do ALL the crazy things that each of us might say "oh that's worth doing, if you're going to do it right."

Maybe someone should start a thread of, "What do you preach but not practice?" I bet we all don't do some of the things we say are "the right way" when asked.

[XBIGPUN66]

I believe at the beginning of this discussion this procedure was suggested as a possible solution to an ill fitting prop which did not seem to go all the way on. Not " just to do it" or as an excessive upkeep option.

Sent from my SAMSUNG-SM-G930A using Tapatalk

[Quinner]

Lapping a prop is not really a maintenance item, it is the correct procedure for a proper installation and a good fit, it should be done when a NEW prop is installed, one and done. Suppose if you ever removed and re-installed that same prop it wouldn't hurt to check it again however.

Scott, I am not a very good listener either, had a big fat Steak Burrito for lunch yesterday

[functionoverfashion]

I believe at the beginning of this discussion this procedure was suggested as a possible solution to an ill fitting prop which did not seem to go all the way on. Not " just to do it" or as an excessive upkeep option.

Sent from my SAMSUNG-SM-G930A using Tapatalk

Haha, this is true. And I didn't see anywhere the possibility that the key got pushed up and out of the channel a little, which can cause the prop not to go on all the way, as many of you already know. That's an obvious, easy thing to check.

If we forget about lapping, one thing you're also "supposed to do" when installing a prop is take the key OUT, put the prop on, and mark the shaft at the upper end of the prop (toward the boat) so you can see how far it goes on by itself. Then, take the prop off, put the key in, and put the prop on by hand - if it doesn't go to the same mark, it's binding on the key.

Oh, how easy it is to get distracted.

[charlesml3]

when installing a prop is take the key OUT, put the prop on, and mark the shaft at the upper end of the prop (toward the boat) so you can see how far it goes on by itself. Then, take the prop off, put the key in, and put the prop on by hand - if it doesn't go to the same mark, it's binding on the key.

I think it's easier than that.

1) Take the key out.
2) Slide the prop on as far as it will go, aligning the slot in the prop with the slot in the shaft.
3) Slide the key into the slot.
4) Put the prop-nut on and tighten it down.

[functionoverfashion]

I think it's easier than that.

1) Take the key out.
2) Slide the prop on as far as it will go, aligning the slot in the prop with the slot in the shaft.
3) Slide the key into the slot.
4) Put the prop-nut on and tighten it down.

That will definitely work if there's room to get the key in, but that's not always the case. If there is, though, yeah, simplify!

[charlesml3]

That will definitely work if there's room to get the key in, but that's not always the case. If there is, though, yeah, simplify!

Yea. I've only done that on a 1999 Air, a 2000 Air and a 07 SV-211. I can't be positive it'll work on other boats. I haven't had occasion to pull the prop off my 230 yet so I don't know if it'll work.