need a little advice.

[termitestockstill]

I have a 1988 25hp Johnson with a 10×13 aluminum prop. Its on a 12×42 modified "V" welded Aluminum boat. My problem is engine overspeed at WOT. The motor was on a 14×52 all weld before I got it and I think the prop was set up for that hull. I want a SS prop anyway, just need to figure out which one. Any help would be greatly appreciated.

 

[jestor68]

What is the WOT rpm?

Max is 5500 rpm.

 

[Mi duckdown]

A 25 hp on a 12 foot boat?

 

[termitestockstill]

I'm going back to the river with the tac in the next couple days. Its obvious that its over revving. Will have hard data soon. The boat is rated for a 25.

 

[termitestockstill]

Last boat was a 14×42 with a 60 evinrude on it.

 

[steelespike]

We need the lightly loaded wot rpm and gps speed.