For my 79 Hunter 30' with a Yamar YSM 12 I went with a three-blade Campbell Sailer. Copy of e-mail below---
"Thank you for your email, and your interest in the Kiwi Feather propeller. Unfortunately the smallest diameter Kiwi Fearther Propeller is a 15" and we require a minimum of 15HP for this prop.
Based on the information that you have provided, we would recommend a CS3LH12x7x1 for your installation. This is a Campbell Sailer, three blade, Left Hand rotation, 12" diameter, 7" pitch for a 1" shaft. This size is recommended to give you a good cruising rpm and still have reserve for head wind and seas.
This propeller would cost you US$329.00 plus a shipping and handling fee of $35.00. It would take us 6-7 days to make this propeller and approximately 4-5 days for delivery. We accept checks by mail, or credit cards by mail, fax, or phone."
Installation was straighforward as I did it on the hard before Spring launch. Slight improvement in performence. See jpeg of prop when new and prop at start of next season.
Ian
s/v Meant to Be