Homelite 26B Blower

[vicchap1]

Good morning, 
I have a 26B blower that has had any issue since it was new. Its now approx 5-6 years old at least. Since it was new it has had a high pitch squeal when running at high rpm's. At low rpm's you can faintly hear it. 
I have been put off tearing it down to investigate, but now i got time to get into it. 
Any suggestion would be greatly appricated. 

[sparky]

Could be a worn bushing or bearing in the blower. Check the recoil housing also for something rubbing there or the flywheel fins.