Originally Posted by paintman
It's surprising how much impact a box can take without doing damage. Friend of mine trashed an alloy prop in a big way on a concrete lifeboat slip - I saw & heard it & was expecting a LOT of damage. Changed the prop & no subsequent issues at all. So I'd suggest it takes quite a lot to bend a shaft!
Difficult if you can't do your own work - I do. I'd drain the box oil & see what comes out. If there is water in it then there could be seal damage. But if you've got no vibration issues throughout the rev range I'd renew the oil, run it & see what happens.
If you can't then I'd concur with getting a second opinion from somewhere recommended.
Very help- thank you. If there is water in the gearbox oil, as they say, and therefore seal damage as you mention, can the seals just be redone rather than having a new gearbox?
They say there is vibration in the gearbox due to the bent shaft but I haven't noticed any vibration while running the boat. Would you keep running the boat?
Also so you think the whistling noise might be related?
Thanks again so much for your advice.