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Old 23 May 2011, 01:29   #11
Crusher's Avatar
Country: UK - England
Town: Southampton
Boat name: Bubbas Bouy
Length: 7m +
Engine: Mercruiser
Join Date: Mar 2011
Posts: 626
An out of balance prop can make a huge vibration! I once had a prop that looked pretty good and the vibration was awful, I thought the bottom end was gunna fall off! One prop recon later and it was purring like a pussy cat! Hope yours is the same!

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Old 23 May 2011, 12:43   #12
Country: UK - England
Town: gravesend
Boat name: curach/Earl
Make: seago/Lifeguard 4M
Length: under 3m
Engine: 3.3 marinar/10 hp
Join Date: Jul 2008
Posts: 802
Cheers Gents,gonna send it off to be reset,then the Earl will fly

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Old 24 May 2011, 08:59   #13
Country: UK - England
Town: New Forest
Length: 6m +
Join Date: Apr 2011
Posts: 50
If your prop is badly damaged, you may have damaged the gearbox due to the excess vibration. Similarly, if the prop is damaged it must have hit something. There could be internal damage to the gearbox as a result of this, and/or you may have a bent prop shaft which could also be causing further damage/vibration etc.

Posting a pic of the prop would help to indicate how bad the problem is likely to be. Also check and see if the prop shaft is bent by rotating it with the engine in neutral (and switched off of course!)

I had a similar problem once. Hit something in the water. One blade on the prop was damaged. Limped home with it vibrating quite a lot, cost £2000 to fix :-(
marinesafety is offline   Reply With Quote
Old 24 May 2011, 17:32   #14
Country: UK - England
Town: Dorset & Hants
Boat name: Streaker/Orange
Make: Avon/Ribcraft
Length: 4m +
Engine: 50Yam/25 Mariner
Join Date: Apr 2007
Posts: 5,551
I did this and thought I done a lot of damage to the engine...but it was all fine. I thought the engine would drop off it vibrated so much getting home...
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