Side effects of a chewed up prop?

[jspansel]

Hey! I have a 5 hp Merc (1994) and the prop is pretty beat up and gouged. I feel it should move the boat faster. From what I see, the original prop was a 7" pitch, and the one that is on the motor now is 8" pitch.

The motor and boat is nice and smooth (idle to 3/4 throttle) until I go WOT, then my aluminum boat vibrates like crazy! It also does not seem the motor is revving as high as it should at wot. I have no tach so I cannot say for sure... I normally carry 3 people total on boat, battery, and electric trolling motor and gear. I do not expect this motor to plane this boat, 13' valco V aluminum. But I am hoping to move it a little faster going down to the original 7" prop and hopefully stop the vibrations.

Thoughts?

 

[mpsyamaha]

Re: Side effects of a chewed up prop?

a new prop will likely help the speed and vibration. dont expect any miracles.

 

[jspansel]

Re: Side effects of a chewed up prop?

Thanks! Yeah, no miracles expected! Just want it to be where it should and not vibrate at WOT. My boat is a real old tin can, so some of it is attributed to that as well.

I ordered the 7" Pitch prop, so we will see.