Little "chatter" in gear at very low RMP

[chagrin 236 nautique]

I am new to the forum - hope I am doing this correctly. We have a 2007 236 that we purchased 3 years ago. Boat runs great and has very low hours on it. As we left the dock this weekend we had a little chatter every once in -awhile at slow the slowest speed. As we put load onto the engine it sounds fine and no issues. Thought maybe prop was loose - but it seems fine. We recently added a clean air exhaust - so maybe now we are hearing more as the boat is quite. Should we be concerned on that sound or is that normal at a very slow RMP to hear it chatter every once in while?

Second - I am wanting to change transmission oil but can find very little support if we have a transmission filter. We have a PCM Power Pls 2007 transmission. DO we do fluids in both the Transmission and the V drive - or are they one. Sorry to sound stupid - just trying to learn the system. Any professionals or websites you know of to buy supplies for the transmission would be great to know!

[Skiyal8r]

I’m experiencing the same sound on a 2006 220. Hopefully someone has some insight on this.

[ScooterMcgavin]

My 06 210 did it too. It’s pretty annoying but has something to do with the damper plate

[SilentSeven]

Should be able to find trans/fluid details this manual

https://www.planetnautique.com/Corre.../2007PCMOM.pdf

I have yet to see a trans filter on any boat...there are typically trans coolers.

[NautiqueTim]

Switching from forward to reverse too fast will cause a short life of the damper plate springs, which can crack or fall out making noise.

[malibud]

Mine does the same 2007 SANTE

[swatguy]

The small “rattle “ is very common when you’re barley engaged . It is damper plates, Doesn’t necessarily mean anything is wrong or your should be extremely worried. Bleep the fluid fresh , topped off and change at intervals.