Tohatsu 25hp high RPM surge but loss of power

[nhlegmaker]

Out in the skiff today and my 2002 T 25hp is revving up on the top end while losing speed. Is this a thrust bearing or "hub" in the prop? Can that be easily replaced?
Thanks in advance for your responses!

 

[pvanv]

Likely a spun prop hub. Replace the prop after testing.

 

[nhlegmaker]

Thanks! Easiest to just replace the entire prop?

 

[Georgesalmon]

Yes, get a new prop and then have your old one repaired for a spare.

 

[Sea Rider]

To be 100% shure perform a hub slip wot test and then go from there. Assume that's the original prop right ? If so which pitch is it, a 13 ?

Have you tested that prop on your combo at wot with an induction tach as usually loaded ?

Happy Boating

 

[nhlegmaker]

Pulled the prop today, has 9.9x11 stamped on it. There are four to choose from for that model, looks like 9-13. This is a flat bottom Sturdee skiff that I use to haul gear back and forth to my moored boat and for family adventures in the bay. Any thoughts on best pitch? Stick with the 11?
Thanks guys!

 

[Sea Rider]

Without an induction tach installed to check max wot revs is same as shoorting in the air, a 13 pitch will produce about 1 K less wot revs than a 11 pitch, preferred is a 11 pitch, both being same diam ones.

Happy Boating