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Old 09 August 2014, 13:51   #1
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Country: UK - Scotland
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If it were cheese it would be Gorgonzola!

Picked up this 'new to me' 17 pitch propeller for 40 on Ebay. Looking for a few more knots from my standard 15" propeller on the Tohatsu 60hp which is already topping out at 5,800 rpm.

All edges were straight, and no dings or cracked blades.

On arrival. I noticed there are a few holes on all three blades. Nothing structural. I assume from electrolysis. Looks to me like an aluminium propeller that's been in the drink with no sacrificial anodes. Was difficult to see on seller's picture.

Cleaned it up with wire brush attachment on the drill, filled the holes with chemical metal, sanded, filed edges, then washed it down. I'd like to remove all the paint, but life's too short. I'll degrease, then next stage is an etch primer, then black enamel top coat.
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Old 09 August 2014, 14:42   #2
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If its a long term replacement I'd be sending it to steel developments for the once over. That way you know itl be true and balanced

That looks nasty
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Old 09 August 2014, 16:25   #3
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Country: UK - Scotland
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If its a long term replacement I'd be sending it to steel developments for the once over. That way you know itl be true and balanced

That looks nasty
No need for that Alan. If it's any good, then long term it will be something in stainless from Solas?
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Old 10 August 2014, 05:54   #4
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I reckon those holes were caused by severe cavitation, see how they're all in a line across the blade.

Mix up some metal epoxy, back fill and rub down before painting. When you mount it on the spline, rig up a pointer on some bricks or something and rotate the prop. You'll soon discover if your blades are out of true. If it's anything more than a couple of mm per blade I would look at a professional rework and balance or a new prop.
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Old 15 August 2014, 09:33   #5
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Gorgonzola.
Actually, if it were a good ripe Gorgonzola, you'd be chasing it around the plate with a spoon, I think in your case, what you have is a cheeky Emmental, I'll get me coat
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