[Public-list] Prop required for a repower

[thomascwcj at bellsouth.net]

I have an Alberg 30 with a Yanmar 3YM20. The shaft is 7/8" and I'm wondering what is the best three bladed prop alternative in order to realize maximum efficiency. The current two bladed prop is that which was used with the old A-4 (a 12"x9"...I think). I've read that, considering the aperture size, a three bladed 12"12" might be the best alternative. Anybody have any advice and/or experience with a similar situation? Thanks.
Chuck