Do I need more cup on my prop?

[frozenokie]

I have a 13x19 Mercury brushed SS prop on my 115. It has great hole-shot, but fails to "hold" itself in the water. When I put on the Michigan 21P polished SS prop, which has much more aggressive cup, it holds much better and lifts the nose of the boat correctly, but I don't like the hole-shot. I figured that the 13x19 needs more cup to grip like it should or like the 21P prop.

Is the cupping of the 13x19 prop the main problem?

 

[kynolan2183]

Re: Do I need more cup on my prop?

Boat props are like women. The more cup the better.

 

[Dhadley]

Re: Do I need more cup on my prop?

Well, almost. If the 21 carries the bow but has a bad holeshot most likely you can raise the motor and improve both holeshot and top end.

Cup placement can make a prop do different things. If your boat needs help carrying the bow then tip cup will help as well as extending the cup further around the tip.