Hitzer blower problem

I have a MODEL 983 FIREPLACE Hitzer after four years of use the blowers soundlike two aircraft engines in my living room...do they need lubed greased and yes they have been cleaned but did not help

They normally should be cleaned and oiled (electric motor oil/3 in 1) every season. Sometimes you have to dismount them and find the oil holes in the case. Sometimes they can be oiled, sometimes they can't. If not, check online or your dealer for a replacement.

The Combustion blower or the room air (convection) blower? Either or, they should be oiled every season.

I use this, even though rated for the larger motors, seems to work well for the blower motors.
My local hardware store around $3.

Ok update on question when I dismantled the fan there is a plastic piece that the fam blade assembly itself fits in ,,in the piece of rubber holding it....can this be replaced?????I have used 3-1 oil and when I reasemble it it still starts the squeak process overagain...I dont want to replace the whole fan assembly ???? if the little plastic piece and rubber holder needs replaced any Ideas ?????????

Not sure, can you post a pic? I don't know any rubber parts in any of the blowers I have taken apart. Mostly metal housing with a metal squirrel cage blower..or is it the rubber mount for the stator or bearing of the motor? Not sure if that can be replaced separately or not?

You can check ebay or http://www.electricmotorwarehouse.com they may have something....