Re: Question for One Last Cast, jdenton
It's hard to determine if we are talking about the same thing. <br />In my situation, at planing speeds ( the faster, the more prevalent the problem ), as I trim the motor in, i.e. bow down - say if I am approaching a boat wake - I hear a noise not unlike the sound of wind in hydro wires. I would NOT describe it as a squeeling or screaching, like a bad wheel bearing might sound.<br />I seriously believe this is some sort of resonating sound. As the stresses on the outboard change as I trim it, a natural resonance frequency develops and it whines. This is a bit of a reach but the type of sound it makes and the lack of any other explanation forthcoming, it's all I can come up with. I suppose it's fairly easy to test, changing the trim tab on the motor or say adding some weight to the motor somehow might change the resonance frequency. My guess is the resonating comes from the trim unit itself, specifically the guide shafts, simply for their symmetrical shape and precise design. Again, simply a semi-educated guess.<br />BTW, I noticed a drastic decrease in sound when I added a hydro-foil.
