Boats For Sale:
Prop install |
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AussieNorts 
Groupie 
Joined: March-10-2007 Location: Australia Status: Offline Points: 82 |
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 Topic: Prop installPosted: September-27-2012 at 11:31pm |
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I have installed and lapped the prop on last night and when installed on the shaft after I put on the castle nut it is a long way from where the cotter pin goes through the shaft. My question is can I use a castle nut in this situation and still install the cotter pin? Or should I use a nyloc nut with a cotter pin folded over as much as I can so if nut runs loose the cotter pin is reducing how far it can unscrew?
Please refer to picture below:  Here is a close up of distance from cotter pin hole:  Any thoughts are always appreciated guys. Steve |
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Correct craft.....is there any other boat?
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8122pbrainard
Grand Poobah 
Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: September-27-2012 at 11:44pm |
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Steve,
Even though it's really not the nut that keeps the prop on, the nut should be there just for added security. Somethings up with that shaft!! I've never seen one where the nut/prop goes on that far. Usually you may need to use a washer between the the nut and prop but that's it. Yes, I'd say go with the Nylock as long as it's the brass. |
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tbeard
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Joined: April-26-2012 Location: Fort Worth TX Status: Offline Points: 379 |
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Posted: September-28-2012 at 12:18am |
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What does "lapped the prop" mean?
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Thanks.......Tom
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OverMyHead
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Joined: March-14-2008 Location: MN Status: Offline Points: 4861 |
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Posted: September-28-2012 at 12:39am |
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Lapping is when you use an abrasive compound to match the tapper of the shaft to the tapper of the prop. Pete has a great thread on the process. here somewhere.
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For thousands of years men have felt the irresistible urge to go to sea, and many of them died. Things got better after they invented boats.
1987 Ski Nautique |
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kapla
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Joined: March-27-2008 Location: BA, Argentina Status: Offline Points: 6148 |
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Posted: September-28-2012 at 1:26am |
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had almost the same situation, and was intalled with 1 SS nut and the castle over it...I was warned over here it was a bad installation.
After a log hit had to remove the shaft to have it straighten it and had cut to the proper lenght |
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<a href="">1992 ski nautique
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KRoundy
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Joined: August-23-2010 Location: Lake Stevens Status: Offline Points: 1702 |
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Posted: September-28-2012 at 3:39am |
Check out the FAQ. Proper prop installation is linked a few posts down. Steve - Just looking at those photos, what kind of propeller is that? It would appear that it is just bored out too much and thus the prop sits up too high on the shaft. Kevin |
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Previous: 1993 Electric Blue/Charcoal Ski Nautique
Current: 2016 Ski Nautique 200 Open Bow |
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MattB
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Joined: September-30-2011 Location: Nottingham UK Status: Offline Points: 376 |
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Posted: September-28-2012 at 8:40am |
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This is exactly the same issue I had with my recent install of my A.R.E shaft with my ACME 422, I used the Nylock that was supplied with the shaft rather than the Castle nut and cotter.
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Fl Inboards
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Joined: January-20-2008 Location: United States Status: Online Points: 2119 |
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Posted: September-28-2012 at 9:23am |
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That shaft was not drilled to accommodate a castle nut. it is a modern shaft designed to utilize a brass nylock nut. Stay away from utilizing Stainless steel nuts unless you are going to utilize a double jam nut set up like what is sometimes utilized on other inboard applications.
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Hobby Boats can be expensive when the hobbyist is limited on their own skill and expertise.
1993 Shamrock "fat" 20. 2008 Nautique 196 5.0 |
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AussieNorts
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Joined: March-10-2007 Location: Australia Status: Offline Points: 82 |
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Posted: September-29-2012 at 10:03am |
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I have checked the prop on this shaft, the nut bottoms out on the thread before it makes contact with the prop, it is only a small amount. Can I place a brass washer or spacer behind the nyloc nut? I have checked this with my new 3 blade Acme 470 and the old 4 blade OJ Legend. They fit to my old shaft but my new one, the thread seems different. The boat shop that did my engine, supplied my new shaft, I gave them the old one to make sure. Feeling deflated about this a little
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Correct craft.....is there any other boat?
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GlassSeeker
Grand Poobah
Joined: November-26-2008 Location: Elk Grove, CA. Status: Offline Points: 2421 |
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Posted: October-01-2012 at 4:22pm |
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I would venture a guess that you will be fine using a washer and nylock nut. It would not hurt to put a cotter pin in just for a safety although probably not nrcessary.
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tbeard wrote: