Wleopard2 Posted August 27 Report Share Posted August 27 2017 f22, raptor 400. Boat runs and starts up perfect, no issues with charging or heating or oil pressure. Just bought the boat yesterday. Took it out on a test drive no issues no noises, today I get the family out and we ride around for an hour or so, slow down to tube and I hear a high pitch whine. Thought it may be the radio/sub interference but I switched that off and it still does it. Under throttle the boat makes absolutely zero noise, it’s only under deceleration. I had the wife drive as I inspected and it seems like the noise is coming from the transmission area but it’s after the transmission is in neutral and the shaft is coming to a stop. Anyone seen this happen? I ran the boat on the trailer as soon as we took it out of the water to see if I could potentially check the strut/cutlass bearing, but i couldn’t replicate out of water. Help is appreciated! Quote Link to comment Share on other sites More sharing options...
Tim Posted August 28 Report Share Posted August 28 Could it be gear lash caused from misfire? See one of my recent posts. Replacing spark plugs removed the sound in my case. You might also have to replaced plug wires and rotor if it has one. Quote Link to comment Share on other sites More sharing options...
Wleopard2 Posted August 28 Author Report Share Posted August 28 It’s the indmar raptor 400. So it’s cool and plug. Misfire would throw a code hopefully! Quote Link to comment Share on other sites More sharing options...
bloodiestcadaver Posted August 28 Report Share Posted August 28 I would suggest getting your shaft alignment checked. Ive had similar issues that seem to come and go. Since you just purchased, you never know if its been done recently. my guess is its rubbing on decel. I wouldn't be surprised if it didn't make the noise next time you are out Quote Link to comment Share on other sites More sharing options...
Wleopard2 Posted August 28 Author Report Share Posted August 28 I’m going to lash the coupler tomorrow when I get home, I hope it’s something as simple and moving the engine around lol!! bloodiestcadaver 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.