Hi,
It's Wally here. I'm restoring a Walker H28 and need a prop (Need a lot of things).

I can either jump in the winter water with a ruler,

Or,

Does anyone know the prop space, shaft to Hull/Rudder/Anything in mm. I'm told I should have 15% clearance.
14" = 204mm aperture radius from shaft.
15" = 219mm aperture radius from shaft.
16" = 234mm aperture radius from shaft.

Thanks heaps, may the work drag on.