Re: Q's about prop's
My 2 cent's, I run a similar setup to yours with a 1964 14 foot fibreglass hull, 1964 Evinrude 40HP Lark V. If it is the original prop on it you will probably find its just under 14 pitch, 13.25 I believe.. I sent mine to a prop shop and had it retuned to 14P. I had originally planned to raise my motor up as Paul ahs mentioned. I have the electric shift lower end so it is very streamlined and pointy. I have a 35 hp maual shift as well with the "BLUNT" end that you have so I know what Paul is referring to. I originally put the cavitation plate level with the bottom of the hull but I had extreme cavitation in turns or rough water. I ended up moving it down untill I could grab all the time, but only just. My point here is that your hull may be limiting you, not the prop or depth. I run 25 to 26 MPH at 4200 RPM which for me is WOT, My problem is the hull which <br />wets" out too much. There is a hook in the bottom of my hull near the stern that is forcing the bow and the centre line to run "in the water too much. This is very common in old fibreglass boats, especially if they have sat on a trailer for a long time. Come spring I will repair the hook and hopefully gain rpm and speed. Just something to check.
and I might say, Very knowledgable too. <br /><br />Now with all my Awesome tact Ill tell you what I think.<br /><br />First off gaining 4-5 MPH with just a 35 HP engine regardless of prop and setup, depending what type of boat it is on is really asking for something. Not completly unheard of though. Let us know what type boat, where the cavitaion plate is in refference to the bottom of the boat and the RPM #s when you get a tach, and we will see what we can do.
