Ayuh,.... Ya need to Measure the propshaft, 'n it's taper...
the length of it?
see alot of props for alpha of bravos but not listed any for velvet drive?
how will i find out which prop to fit? its a v drive 10-17-004
If you have a prop there should be a size number _ _ X _ _ also a manufacture number.
Its possible a boat model and brand may help.