My 2017 sfx is making a high pitched howl at 3200 rpm. It does it thru out the rpm range but it can be heard best at 3200. I have asked the dealer to drop the motor down 1 hole. { that is all that is left } The motor has a stainless prop, and other than the noise runs fine. Anyone else experiencing this phenomenon?
I have the same motor and mine makes that same sound. It starts around 2400 rpm "howls" up until roughly 3400. I had my dealer come out on the boat with me to listen and they verified that is normal.
I have the same motor and mine makes that same sound. It starts around 2400 rpm "howls" up until roughly 3400. I had my dealer come out on the boat with me to listen and they verified that is normal.
I called Mercury and they said it is not normal, I had the mechanic ride it and he confirmed something was wrong, He felt that by dropping the motor down, it may correct the problem.
My old 115 did a little of that. I was told it's normal. Harmonics was what they told me. A resonance is hard for me to believe that unless they all did that, but I needed a bigger motor and I traded it in anyway. I have video of it somewhere. When I traded it in, they took it for a test drive and said nothing about it. Anyway, my 150 does not do that. This is first I've heard of it.
I have a 175 optimax on my bassboat that screams like a banchee between 3500-4000 and a 150 mercury four stroke on the pontoon that is quiet as a mouse.
