2014 SN Squel

I identified a leak from pump area. I know the impeller has little o rings that fall off when installing. That might cause a leak. But should make the squeal. I think it’s the pump. I will take apart today for better observation.

Since you have a serpentine belt with an automatic tensioner have you checked that the tensioner pulley rotates smoothly and doesn't feel like the bearing is falling apart or turning too hard either?

I am now pretty sure it is the raw water pump bearing housing. I ordered a new one from discount inboard marine and will replace it. I noticed the bolts on the pulley were solid stuck and always had to fit a wrench with extension to install and remove the impeller housing. I sprayed some nut buster on the 3 hex nuts and used a pipe on an allen wrench and that broke it free. I will now completely remove the pulley when installing the impeller. Its this bearing housing that will be replaced, so should be super easy now that these 3 hex bolts are removeable. Wil lknow for sure in few days once new bearing assy is on.

Keno, They do have 3 holes to allow to get to the 3 bolts to remove the impeller. The issue is I have to use a socket extension. They then want you to put the bolt thru the pulley hole to get it in position. The problem is, they have a small o ring they want you to install on the back side of the bearing housing. So it is a delicate to keep the o ring on while wriggling the bolt in place and getting the thread to catch. The o ring tends to fall off. If I take the pulley off, then can use both hand and not use a extension and it would be 10x easier to install. And all it requires is to remove 3 bolts off the pulley, well worth it and eliminating all the fishing and dropping parts. I've drop the screw and lock nut fell off, etc, and sometimes even gets lost below under the engine and super small. Then have to buy new ones. No brainer for me. I'll always remove the pulley to install the impeller for now on.

I have never needed to remove the pulley, sounds like extra work for little gain?   A little dish soap to lubricate the new impeller makes them spin right in without a fight.  Dish soap does not damage the rubber impeller.  Grease can cause rot in the rubber impeller.

I added the new raw water bearing housing and it came with the missing 3 little o rings, I re-used the new larger o ring for the housing I got with the impeller. This solved both the bearing squeal issue and leak issue. The bearing just must have gone bad. It was only a 2014, so only 8 years old and about 700 hours. Never had an issue on my previous 1996 SN I owned for 20 years. But engine is humming again, very happy. I now can easily remove the pulley when installing the impeller so it will be much easier to align and install from now on as a bonus.