Prop Change Rcommendations

[dropbear68]

Id like to change the prop on my 1977 V4 85, the original is a bit ratty now, Id like to change pitch to try and extract a little more performance, my boat is 17 foot long and is fibreglass, any ideas on pitch for a replacement?

 

[F_R]

Most important thing to know is what the full throttle RPM is now. Without knowing that, it is impossible to make a good choice, other than spending a pile of $$ on trial and error. Remember, increasing pitch will decrease RPM, reducing pitch will increase RPM, without a real big change in top speed (assuming same type of prop). Other factors such as blade style, cupping, and yes condition, will do more to increase performance.

 

[dropbear68]

Ok so your saying wait till it sin the water and run it at full throttle and note RPM? water is a little way off for us at the moment, maybe next season, though we do use our boats in winter here in OZ, I have a fair bit of fit out work to do before we can venture down to the water