3 blade prop

[schaefer]

the stats given at this site say na to 3 blade prop on the 31....does anyone have a 3 blade prop on their 31???...can you please give me the numbers...thanks

 

[Alex]

If it has Yanmar 2GM20..

..with standard gear , and if your 2 Blade is 15*12 , then the 3 blade should be 15*10 or 15*9 ( I would go for later)these are the specifications for the 29.5 , which by large have approx samedata.Additionally,in general lines, on these boat/engine size, going from 2 blade to 3 you substract 2 inch pithch.The best will be to take this to a propeller shop.

 

[John]

I do

My 83 H31 has a bronze Federal 14X10 RH prop. With the 2GM12, it is able to push along at about 5.1 kts @ 2800 RPM. Is that good? The fixed blade design slows you down under sail alone.