Removal of prop?

[JD 1990 Four Winns]

Hello I am pretty new to boating and I am making myself learn how to do things to boats one of which is how to remove and put back on a prop.

I have a 1990 FourWinns 190 Freedom with a OMC cobra 800 4.3 engine

I currently have a prop on there and i ordered a new one so I will need to learn how to take off and put on a prop? are there any websites that shows pictures as they talk you through it? or is it pretty simple? Figred I would ask before I attempted to do it myself. thanks

 

[Banditz]

Re: Removal of prop?

Welcome, and pretty simple. Kinda self explantory really. Pull the cotter pin that goes through the nut out after bending it straight. Then remove the nut. Prop should come off after that easy. If not then lightly tap off with a rubber mallet. Install is reverse. make sure hole in the spline shaft lines up with the nut and then install a new cotter pin. Thats all there is to it. Oh, and this is on all the props I have ever seen...not sure it works for every single kind of prop ever built.

 

[JD 1990 Four Winns]

Re: Removal of prop?

Ok that does sound pretty simple. I recieved my new prop in th mail today. I bought a hustler 3 blade prop the prop also came wth a Hub kit that you slide into the prop. The instrutions seem to be easy but I do have one question on the instructions it says do not install any propeller without a thrust washer in place as a warning. then on step one it says Mae sure your OEM THURST WASHER is on the prop shaft.

Are they talking about the piece the propellor slides onto the lower end unit?

 

[Fl_Richard]

Re: Removal of prop?

On the prop shaft where the prop meets the LU there is a big fat washer. This is the thrust washer. The prop presses on the washer which presses on the LU.

 

[marcortez]

Re: Removal of prop?

Don't forget to put lots of sticky wheel bearing grease on the prop shaft and inside the prop's splines to facilitate easy removal in the future.

 

[superwooter]

Re: Removal of prop?

i have the same question/situation as the original post in this thread, but my prop doesn't have a cotter pin. it has a weird looking washer (i guess) under the nut. i'll take a pic in the morning and post it here. anybody familiar with my type of prop?
i hope this doesn't constitute hijacking. my question was so similar to the original that i didn't want to ask nearly the same question again when this one was so freshly asked.
thanks,
superwooter

 

[Bondo]

Re: Removal of prop?

but my prop doesn't have a cotter pin. it has a weird looking washer (i guess) under the nut.

Ayuh,.. Unbend the locked locking tabs,+ turn it Off....

 

[darkwizard5555]

Re: Removal of prop?

I have a johnson 1980 or so. It has a pin through the hexagon nut. Do I remove pin, then turn counterclockwise or clockwise?

 

[Bondo]

Re: Removal of prop?

I have a johnson 1980 or so. It has a pin through the hexagon nut. Do I remove pin, then turn counterclockwise or clockwise?

Yes,... counterclockwise...

 

[Home Cookin']

Re: Removal of prop?

I've heard of a "prop wrench" or "prop removal tool" but never could figure out why you'd need one or what they are for--a gimic, or is there a type of prop that doesn't work like the ones described here? I've never needed anything to remove one.

Also, do you all think it is necessary to tighten the outside hex nut all the way down? I was taught to tighten but back off for the pin hole, so usually you end up hand tight, with a little play. I can't see how play would hurt, since the prop pressure is constant one way or another, and a little play may prevent that grease lock you sometimes see when a prop isn't removed seasonally for lubing (salt water).

 

[hungupthespikes]

Re: Removal of prop?

Beg, borrow, or steal a torque wrench for the prop. The game changes when your talking a thrust washer. Too tight and they break, too little torque and the "slap" will eat up the brass washer in a hurry. Both end up with losing the washer and lower unit damage! Way too much money to repair for something so easy to avoid.

Youtube has some videos that will help, but get the book for your outdrive.
Home Cookin
The Prop Wrench is a good thing for the boat tool box, small and cheap. I carry one on-board along with the spare prop and all the hardware, just to get me back if I loose or damage a prop.

 

[Home Cookin']

Re: Removal of prop?

so is the prop wrench anything but a socket for the hex nut and if so why a "special" tool? But then, I don't tighten mine past where the hole lines up. For that reason, how can you use a certain torque when you have to line up the holes?

 

[Bondo]

Re: Removal of prop?

For that reason, how can you use a certain torque when you have to line up the holes?

Ayuh,... We're talkin' about prop nuts that Don't use a cotter key, but a Ny-lock nut instead....

 

[hungupthespikes]

Re: Removal of prop?

per Yamaha
NOTE:
If the propeller nut does not align with the
propeller shaft hole after tightening to the
specified torque, tighten the nut further to
align it with the hole.

Home Cookin
I worked with Japanese engineers for 10 years and they just never back off the final torque. You were taught one way, the group I worked with did it another.
Just different strokes for different folks. And yes, I was taught the same way you were, but now I get to within 10% then go one or two holes more till I'm within ?3% of the final torque.