I sent him up this one after his Hydraline needed lots of work
New folding propeller from Hydralign Sydney is on the old for sale add for his boat and if you look back a while in here he had big dramas I think its sitting in his garage now cant fix it
I think the blade shafts and the housing wore out and they don,t have bushes
heres a video
If they were made so replacement bushes could be fitted when a rebuild was needed they might be OK but there not
So of Bubble problem was they need lubrication every 12 months but I don't think Bubble was told or knew that when he bought the boat but until they make them so they have bushed I would not touch them