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Old 18 March 2009, 15:03   #1
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Warp in shaft?

I hit a rope when I was out yesterday. The rope did not wrap around the prop. It was caught by the leg of the outboard.

Is it possible that I warpped the shaft (the shaft that holds the prop).

If I warpped the shaft How would I know? The engine revs up ok and at WOT there is no strange vibration.

I did clamp a bit of wire to the cav plat and took off the prop It was hard to tell if the shaft has awarp in it at the wire kept vibrating?

If there is a warp in the shaft Should changed as You could have a new shaft put in and hit another rope new week and warp the new shaft. Ifthe shaft is warpped what are the problems with leaving it in place?

You help and advice please

TSM
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Old 18 March 2009, 15:21   #2
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Old 18 March 2009, 15:22   #3
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if the shaft doesnt wobble around when you spin it, and there is no vibration,
and assuming there are no oil leaks and it goes in and out of gear OK then i would suggest you dont have a problem.
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Old 18 March 2009, 16:17   #4
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You should be fine hitting a rope.

On one of our Yams the prop hit a rock writing the prop off, once the prop was off it was hard to tell if the shaft was bent.
By putting a screw driver next to the shaft and rotating it you could see how much it was bent by.
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Old 18 March 2009, 16:53   #5
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Mick it takes a lot to bend a prop shaft. You would need to hit a rock or metal object at fairly high speed with a stainell prop to really stand a chance of bending a shaft.

I have hit a rock at 20 knots in a shallow river on my old rib when I ran a Johnson 90 and the prop was totally screwed, luckily it was Ali and the shaft was fine.

Chris
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Old 18 March 2009, 16:54   #6
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That is why I use an ali prop. The prop is fine just some paintof the leading edges. I notice that there is some paint mission from the prop whee it is inside the hub.
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Old 18 March 2009, 17:25   #7
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It was an alloy prop we were using!
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Old 18 March 2009, 17:41   #8
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Hi Chewy it was the type that comes with the engine Ali
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Old 18 March 2009, 18:01   #9
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The ones we had on were normal yam props.

Neve had any trouble with the stainless ones.
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Old 18 March 2009, 18:19   #10
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I am after taking off the prop "solas type from steel developments" I then spun the shaft by hand by sticking a nail into the hole for the split pin. I then checked the shaft by tying a stiff wire to the anoide and lining the wire up with various parts of the shaft. thankfully the shaft is true. The prop when placed on the shaft is not. The prop is not completly true. But there is only a very small nick on the leading edge,

Now I can sleep for the night. Thnks for the help and advice

TSM
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