shrill whistle sound after replacing prop

[GrahamH]

I dinged my prop slightly, enough to cause some vibration when pulling a skier out of the water. Replaced the prop with a spare that was identical. No vibration but when idling forward there is a shrill whistling sound. It goes away with a bit more speed. Seems to be coming from the engine. I wonder if there is some harmonic that is causing the springs or something in the flex plate to vibrate at a very high frequency. Any ideas as to what it could be. Boat is an 05 RLXi with 383 HH with <150 hours. Prop is a 13x13 425

Thanks

[nuttyskier2002]

I dinged my prop slightly, enough to cause some vibration when pulling a skier out of the water. Replaced the prop with a spare that was identical. No vibration but when idling forward there is a shrill whistling sound. It goes away with a bit more speed. Seems to be coming from the engine. I wonder if there is some harmonic that is causing the springs or something in the flex plate to vibrate at a very high frequency. Any ideas as to what it could be. Boat is an 05 RLXi with 383 HH with <150 hours. Prop is a 13x13 425

Thanks

Are you sure it's coming from the engine compartment? Did you lift the cover to see?

Before I changed out my cutless bearing (strut), I had a sort of muffled whistling sound (in water). When I sped up just a bit (from idle) it would go away. I installed one of the new plasic bearings from SkiDim and it's been much more quiet every since.

[tvano]

the sharp edges on the new prop can cause it to sing.

search the board and you will find that a LIGHT touch with a fine file will cure the problem.

[davemac]

Read here...thread

and here...thread

or do a search for "prop sing"

[nuttyskier2002]

This very well could have been what was making noise on mine as well. I did have my prop re-worked while replacing the cutless bearing.