How to make it faster???
 

Hey everyone, i own a 25hp Mercury tiller on my 16' Lund boat. I am just wondering if anyone knows how to make my motor a little bit faster. I heard that certain kinds of props will make it a little bit faster or by tilting the motro upwards which will reduce hold up might work too. Is that true?? Or do u have any other ideas??
thanx a lot

RE: How to make it faster???
 

I know the different props can effect the speed of your boat...not sure about tilting it up and down but I would be the more you tilt, the more forward thrust you are going to loose, kinda makes sense anyways. The one thing about props, man they are exspensive LOL!

RE: How to make it faster???
 

hey silver8088 unless that 25hp merk can put your boat on plain dont worry about tilt it will not affect you speed , and the only way to get more or less speed is prop change and thats it ok sea yas <img src=icon_smile_big.gif border=0 align=middle>

RE: How to make it faster???
 

thanx for the advice.

P.S.--Approx. how much diff. will a diff. prop make in MPH???

RE: How to make it faster???
 

well silver8088 ive seen as mutch as 20 mph on a prop change , but thats on large HP motors ,but on a 25 HP mercury i whould bet about 6 mph faster or slower on a prop change

RE: How to make it faster???
 

Definitely have it measured on a Tachometer and try to get it to about 3 to 4 hundred rpm below max with the prop you choose when in it alone and nearly an empty tank. 500 rpm below red line is real good with a safety margin too.

One of the easiest ways to get a little better speed is to try some shims on the top of the transom to raise the motor. Try 1/2&quot; at first, then 3/4&quot;, then 1&quot;. Keep increasing until in rough water and turning the motor will race a bit from getting some air near the prop. Then go down to the last one you tried just before the one that 'cavitates'. <font size=4>DO THIS!</font id=size4> It works real good. Gives you faster hole shots and almost makes it impossible to porpoise with the tilt adjustment. I have done it with small 8 horse motors and up to 50 horses with great results.

Fuel economy is very noticable when it is just right. I've gotten about 10 mph increase in some cases.

RE: How to make it faster???
 

thanx for the info everyone