yamaha 225 2stroke prope help

[bekerel0]

I Have I Rib 7,5 Meters With A Yamaha 225 2 Stroke With 21 Pro Prop And The Engine Is Working On 6000 Rpm Does Knows What Prop I Should Put??
Sorry For My English!

[codprawn]

If it's a VMAX the range is 5000-6000rpm but peak power is at 5500rpm. You may be hitting the rev limiter.

Try this

http://www.rbbi.com/folders/prop/propcalc.htm

A 21" prop is usually the correct one. You could try a 4 blade or a 22/23".

[blinddog]

Originally Posted by bekerel0

I Have I Rib 7,5 Meters With A Yamaha 225 2 Stroke With 21 Pro Prop And The Engine Is Working On 6000 Rpm Does Knows What Prop I Should Put??
Sorry For My English!

Yep
Like Codders says a bigger one, best borrow a few props until you gets one to suit.

gaZ