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Old 15 September 2006, 16:56   #1
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Burning bushes at 60 knots+

Talking to a friend yesterday who drives a twin engined (evinrude 250s) Scorpion 8.75m rib. He says that they regularly burn bushes out, hitting rough water at 60 knots +.

Now I drive a meagre 225 Opti, and in 120 hours this season in a range of F1-F8 seas I've not blown a bush once, even after hitting pots, stray lines etc.. Is this a common experience or just crap driving from my friend?
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Old 15 September 2006, 16:57   #2
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Do you mean prop bushes?
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Old 15 September 2006, 17:46   #3
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I've heard that those 'rude 250's go through a lot of prop bushes.

I've taken out the bush on a Solas prop, but they also have a bit of a reputation.

No problems with my Yammie prop.
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Old 15 September 2006, 18:17   #4
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Quote:
Originally Posted by FreeTrader
Talking to a friend yesterday who drives a twin engined (evinrude 250s) Scorpion 8.75m rib. He says that they regularly burn bushes out, hitting rough water at 60 knots +.

Now I drive a meagre 225 Opti, and in 120 hours this season in a range of F1-F8 seas I've not blown a bush once, even after hitting pots, stray lines etc.. Is this a common experience or just crap driving from my friend?
Beats taking out the gearboxes though!!! Maybe they aren't tight enough - VFT is the setting to use on the torque wrench!!!
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Old 15 September 2006, 18:54   #5
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If the engines are Etecs running the standard props then I'm afraid that you can't blame your mates driving. We got through four bushes in less than 120 hours

A switch to Renegade props should solve the problem


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Old 16 September 2006, 04:26   #6
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Quote:
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Burning bushes at 60 knots
I think these were two separate incidents in the Moses story. And I suspect they didn't get to 60 Knots through the Red Sea.
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Old 16 September 2006, 04:42   #7
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Maybe they aren't tight enough - VFT is the setting to use on the torque wrench!!!
No.
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Old 16 September 2006, 08:41   #8
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No.
?????
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Old 16 September 2006, 09:21   #9
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No, slipping prop bushes are nothing to do with the torque of the prop nut, or any nuts at all! The splined sleeve which is bolted to the shaft has nothing to do with the problem - it is slip between the outer surface of the rubber bush and the internal surface of the propeller hub. A propeller repairer who knows his stuff can fit a more heavy duty bush.
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Old 16 September 2006, 15:50   #10
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The big opti bushes are a wedge shaped tube of plastic, they dont wear like the other type
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