You need the Amel special tool so that you can drop the bowthruster drive tube and propellor out of the bottom of the boat, bring it topside and then you can service it...oil, prop shaft seal, foam seal..

BUT it may be that you just need to adjust the cables so that the bowthruster is up compressing the seals when you put the pin in.

There is information in the files section on how to do that..

Cheers

Alan

Elyse SM437 Musket Cove, Fiji