If you knew the 051 justsaws you would know there are no safety feaures. It is pre safety features. No chain brake from the factory and the throttle lock out is basically worn out and inop both of which I'm perfectly fine with. If you can't answer my question, let the other who can do so. See below.
computeruser & Lakeside thanks for the reply, new rubber bushings will "firm" it up that much? They don't seem that heavy but it could be just from absorbing oil for 35 years. I guess I'm just paranoid about buying new bushings and having it feel like a new saw would. When I bought it I basically had a blank check and the OK from my wife to get whatever I wanted so I ran a 660 & 880 neither of which I liked but after running an old 051 the shop wouldn't sell I had to have one so I'm rather "protective" of it. I'd throw the 455 or 025 under a train but never the 051 or XL-12. Also, are they still available or is it a NOS item from fleabay?