Clicking noise coming from coupler area......

[bluemarshboater]

Mercruiser 5.0 alpha 1 gen II

I have a clicking / some what of a rattle noise coming from the coupler area..... I thought maybe the gimbal bearing was bad so I replaced that, but the noise is still there.... sounds like it's on the bow side of the transom, but the noise could be carrying thru from the upper unit I guess.

My other thought was maybe something around the started is catching the flywheel. Not sure what else around that area could make such a noise.

I guess I need to get in there with a stethoscope.

Best
Dave

[Don S]

Could also be the exhaust flappers. The old style could loose the rubber edging on them, then while idleing the would click against the exhaust Y.

[bluemarshboater]

Don, would that noise only be there while idling? It's there at idle and mid-range, not so much at high end.

Best
Dave