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Old 26 October 2006, 13:46   #1
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Nauti Buoy's Avatar
Country: UK - England
Town: West Wittering
Length: no boat
Join Date: Jun 2004
Posts: 1,447
Prop came off!!!


Today my Dad took delivery of his new boat, the agent delivered it to Port Solent to launch at the slip way.

It is a 115 Yamaha Fourstroke. Everything brand new, anyway the wind was blowing, the agent reversed in the trailer and I engaged reverse, and nothing, agent said to lower the engine even more as it was probably the wind keeping me on the trailer, plus the bunks were not helping and still nothing just revs. So I turned off the engine and was gobsmacked. The prop had come off. I hasten to add I did not catch the bottom.

Anyway the centre of the prop was still on the shaft, so was the nut and split pin, on the bit of the prop that was left on the shaft there were some groves where it looked like the outer bit of the prop slides onto.

How on earth did the prop come off, my Dad needless to say was well pissed off, the agent rang the yard and got a Stainless prop sent down and we fitted it. The boat is now on the mooring, safe and sound at Port Solent.

I recovered the prop at low tide, here is the pic. Can anyone shed any light on maybe what might have happened.
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Old 26 October 2006, 13:57   #2
Simon B's Avatar
Country: UK - England
Town: Leicester
Boat name: Vixen
Make: Ribcraft
Length: 6m +
Engine: Suzuki OB 175
MMSI: 235071839
Join Date: Jun 2004
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Looks like the rubber hadnt vulcanised to the prop, if this is a human process my bet is they forgot, if not they could have a whole batch of waiting to catch people out.

The usual failure mode is the the smaller metal bush tearing itself out from the rubber as you'd expect.

New boat is here, very happy!
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Old 26 October 2006, 14:29   #3
Country: Belgium
Length: 9m +
Engine: Ob 2*250/2t yams hpd
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Join Date: Aug 2004
Posts: 885
It doesnt look like a prop intended for a Yam??..

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Old 26 October 2006, 16:51   #4
Nasher's Avatar
Country: Other
Town: Principalite d'Chaos
Boat name: The Nashers Revenge!
Make: Ocean & Bombard
Length: 6m +
Engine: Suzi DT200EFI, DT9.9
MMSI: "Mmmmm SI" she said!
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Posts: 4,141

That looks like a hustler prop to me. Right colour and pattern of lugs etc.

The blades etc are generic and fit to a removable centre.
The two are held together with a 'spider' washer that fits over the top.
Without this the two are not joined.

Had one on an old Johnson, cheap and nasty.

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Old 26 October 2006, 17:05   #5
Country: UK - England
Town: cornwall
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Make: rib eye 430
Length: 4m +
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Join Date: Mar 2006
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Look on the bright side you ended up with a new stainless prop
Lucky I guess you engaged reverse on the trailer or it could have come off out on the water
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Old 27 October 2006, 14:53   #6
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
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Might the prop have been installed backwards?

With some props, the hub adaptor is a splined slip-in assembly; if the prop is installed backwards, it will slip off from the adaptor.


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