1998 Mercury 25 Squeaky

[MotorlessCSJ16]

I've been hearing a squeaky noise coming from the exhaust housing after the motor reaches operating temperature. Motor runs great and pees great (although the pee gets pretty hot...not unbearable to touch but close). Just had a complete water pump job done, too. But the issue existed prior to the pump job.

Also wanted to add that the noise is constant. Not like a lean sneeze where it's intermittent...this noise is a constant squeak.

Anyone?

 

[MotorlessCSJ16]

Re: 1998 Mercury 25 Squeaky

Bump

 

[Bign71]

Re: 1998 Mercury 25 Squeaky

have you checked to see if you have something rubbing maybe when its running the vibration is causing something to move back and forth ? have you tried runnin her with the lid off to see if the noise goes away ? ummm.... does it sound like pressure releasing from the head, maybe a gasket or something ? ok i dont know lol

 

[MotorlessCSJ16]

Re: 1998 Mercury 25 Squeaky

It sounds like it's coming from the exhaust housing. I listened with the cowling off and it definitely doesn't sound as if it's coming from the block.

This is only apparent at operating temperatures when I run the boat. Never at idle when on a hose or at the beginning of the day, cold, at the ramp.

 

[MotorlessCSJ16]

Re: 1998 Mercury 25 Squeaky

Bump

 

[MotorlessCSJ16]

Re: 1998 Mercury 25 Squeaky

Bump. Please help!

 

[MotorlessCSJ16]

Re: 1998 Mercury 25 Squeaky

Bump

 

[MotorlessCSJ16]

Re: 1998 Mercury 25 Squeaky

Ran the boat today and didn't squeak all day until I opened it up on the way back. The squeak is fairly loud and if I "bump" it with a little bit of throttle (just a quick on and off) while I'm idling it gets louder and even chirps a little bit (very rapidly...so I don't think it would be a sneeze). It eventually fades off.

It runs great, though, and doesn't seem to be overheating. I shot some silicone spray on the lower motor mounts and up and down the drive shaft (from the small, tiny area where it's visible), just for sh*ts and giggles.

Anyway, keep the thoughts coming.

I took the cowling off and I guess the spark plugs weren't tight enough (barely finger tight) because gas/oil was leaking out of them (not quickly or anything). I inspected the plugs and they look really good...not fowled or anything, as I compared them to that chart someone sent me on another thread (B. Lee, I think). I did notice this yellow ring around the base of the plastic part that says "Autolite".

Here's some crappy pics:

Not sure what this is...but would like to know .