Hello,

496 ho. I have this rattling sound on startup. After a few minutes it gets much quieter at idle but at 1000rpm the sound is still there. This is the best I can do for video.

thank you

Vid did not post. Try posting to youtube then provide link
most rattling noises i here on boats is exhaust shutters and those damn corsa tailpipes that’s baffles had welds break. Sometimes seear motor hss a rap.

I’d check the exhaust baffles also. Had one making a noise that sounded like a knock at idle. Look in the tail pipes and see if there’s a broken flapper

Hello,

Here is the link.

nothing to worry about,its the diverter valve in the exhaust rattling.

Waterman,

Does your SilentChoice still work?

Thanks. Brad.

Hello,

yes, silent choice works.

I had a weird noise below 1000 rpm on one of my motors - was a bad idler pulley squawking

Just replaced mine. It was chirping. like a bird.