Buster Skiff Restoration

Any questions? We will try and help.
Will
Posts: 70
Joined: 21 Nov 2015, 14:04

Re: Buster Skiff Restoration

Postby Will » 07 Dec 2018, 17:04

Thanks to the very significant help of a Forum member I have acquired a prop which should be right for the job.
Now I have another probably dumb question - the prop shaft has a 5/8 thread 11TPI - being a Morse taper one would assume a BSW thread but could be UNC - same pitch different thread profile - someone enlighten me please?
Also was reading recently that when fitting a prop using a nut / lock nut combination the lock nut should be fitted first ie against the prop hub??
Ive been in the engineering game nearly 60 yrs but never heard of this before any comments??

screwit
Posts: 954
Joined: 09 Apr 2010, 21:29
Location: Stratford vic

Re: Buster Skiff Restoration

Postby screwit » 07 Dec 2018, 21:44

Mine are older shatfs. And are bsw.
I don't like nyloc nuts with out having a split pin through the shaft.
I have brass shim washes and castle nuts .

Will
Posts: 70
Joined: 21 Nov 2015, 14:04

Re: Buster Skiff Restoration

Postby Will » 09 Dec 2018, 13:44

Thanks - this is an old shaft and will go with the BSW thread Ill spin up a couple of Brass castle nuts and washers because if you have a spare it will likely never get used!
The prop shaft key was a bit rough so I thought I would replace it - needed to be taller as Im using a sleeve in the prop. Couldn't move the key so ran a 3/16 slot drill thru the center and and tapped out the 'shell' - easy! Didn't appear to be any reason for the key being soo tight but thats Murphy's law I suppose

Will
Posts: 70
Joined: 21 Nov 2015, 14:04

Re: Buster Skiff Restoration

Postby Will » 09 Dec 2018, 13:53

Another question - when you guys static balance a prop do you use a dummy half key or balance the prop and shaft as an assembly
or I was thinking maybe to make a short dummy shaft / key but that might be overkill?

User avatar
Darren
Posts: 451
Joined: 08 Mar 2009, 21:18
Location: Mornington Peninsula VIC

Re: Buster Skiff Restoration

Postby Darren » 13 Dec 2018, 21:51

Hi Will,
Now your getting really technical. LOL
Stick the prop you've got from your prop guru on your prop shaft and use the old keyway, or make one up.
I may be wrong, but I have never balanced a prop with a key way in.
But mind you I get Steve Moritz in Murray Bridge to handle the prop side of things, he commented when he did Scrubcat's recently, it takes moments to take down the blades, ages to re-balance the prop.
Cheers
Darren


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