Which prop to use on 760

[BBYamaha]

Trying to diagnose a vibration and have 2 extra props I can try, If the vibration goes away I will order a new prop. If not I will contiue searching for the problem. I have aligned the motor with rubber out and have it perfect and it shakes like hell just above idle for just a second till it clears that rpm (about 1200) and if I blip the throttle it the vibration comes about second after I hit the throttle then goes away. Midshaft is brand new.

The props I have say yamaha 15.5 and solas 14.5-18, think it came out of a blaster... The one in it is a skat 13-17 I beleieve that I purchased new last season and looks new still, just wondering if there quality control sucks and I have an unbalanced prop.

 

[BruceSki]

how does your driveshaft look?

if you put a new midshaft and the driveshaft was worn out, it will vibrate.

 

[BBYamaha]

I traded shafts for what I thought was a better one, My last one was bent and this one is straight, Didn't notice any unusual wear but will inspect it closer when I trade props... if this 15.5 is the same pitch as a kawi 15.5 my ski will eat it up and spit it out...

Im on a boat lol funny song...