Prop Repair

Chill

Chill

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11 Feb 2007
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My Sealine T46 is due to be lifted at the end of the month, while out I need to get the std prop repaired as we hit something and there is now a vibration.

Any idea where I can get this done and rough cost?

Windsor on the Thames is where the boat is being lifted

Thanks Geoff
 
About ten years ago I dinged a prop on a T47 in the Crinan Canal. FAL propellors in Buckie, Scotland did a fantastic and very quick repair and returned the prop within a couple of days. It came back better than new! They are a long way away from you but I can't speak highly enough of their service.

falpropellors.co.uk

Richard.
 
I am pretty sure that ours went to Clements when we dinged one last year. Insurance covered it.....no quibbles but then it was Y Yacht insurance as discussed at length on here a while back.
 
Clements Marine +2

Depending on what you dinged it on and how hard you need to look at :
Visual inspection of shaft and taper, any doubt about truth ( straightness) draw it, spin it in a lathe and check with a clock gauge.
Inspect the key and keyway carefully for any sign of fractures, get someone who knows what they are doing to dye penetration or magnet test.
Cutless bearing inspection, any damage or more than 1.5mm of play replace, if you draw the shaft replace cutless in P bracket and stern tube anyway.
Inspect P bracket, will shaft and prop turn freely or do they bind? If so suspect alignment problem.
Check sterngland, coupling and shaft brushes.
Any signs of pinking or corrosion on either props or nuts?
Rope cutters inspect.
 
Invicta Marine.

Any idea where I can get this done and rough cost?
Windsor on the Thames is where the boat is being lifted
Thanks Geoff
Click to expand...

This outfit has been repairing and making propellers more or less since Josef Ressel invented them.
Their prices are very reasonable,especially compared to other restorers dealing mainly with the leisure market.
http://www.invicta-marine.com/Propeller/index.html
Located in the Historic Chatham Dockyard just round the corner from MDL Chatham.
 
Re: Invicta Marine.

When you refit the prop use a rubbing compound between the prop and the shaft ( without the key in place at that point) and check with engineers blue to make sure it is well bedded ,on the shaft with no high points.

Most boat manufacturers don't do this and you can get movement of the prop on the shaft against the key.
 
Re: Invicta Marine.

Seem to remember somewhere a rule of thumb that you really need a min 60% of shaft taper surface area in contact with propeller ?
Probably OK with low power low torque stuff but not sore how valid this would be with high HP boats.
 
Re: Invicta Marine.

The normal load should be prop boss to taper with the key stopping the prop rotating only if you hit something.
 
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