I recently bought a used Ranger from a buddy that has a 2004 Johnson 200 HO. It runs great and has no obvious problems. However, when running in rough water (1-2ft waves) at higher speeds and rpms (50+mph, 5k rpm) I hear a very clear beep like the one when you first start the engine. It doesn't last long and it is not frequent and only happens in the rough water. I see a good pee-stream and I have it all oiled up.
I don't know if it's electrical, mechanical, neither or both. Is this something to worry about and if I get it checked is there anything else I should mention?
Thanks in advance for advice.