Sears model 315.17432
I need to use this router after about 20 years, so I locked it to remove & replace the bit.
I cannot fully UNlock it.
The lever goes to the middle position & the shaft can be turned.
But I am afraid that if I power it up, it will snap back to locked.
In the middle position, it seems that I cannot push the lever inwards fully.
I was just now able to move it down & sideways to unlocked.
But I have to "fiddle" with it, down & sideways at the same time.
I am reticent to spray WD40 into an electric motor housing.
There is an old post with the opposite problem
www.routerforums.com
& everything on the Net relates to "will NOT lock."
Or to breaking the plastic lever.
I need to use this router after about 20 years, so I locked it to remove & replace the bit.
I cannot fully UNlock it.
The lever goes to the middle position & the shaft can be turned.
But I am afraid that if I power it up, it will snap back to locked.
In the middle position, it seems that I cannot push the lever inwards fully.
I was just now able to move it down & sideways to unlocked.
But I have to "fiddle" with it, down & sideways at the same time.
I am reticent to spray WD40 into an electric motor housing.
There is an old post with the opposite problem

Craftsman Router Spindle Lock
The spindle lock on my 15? yr. old router is inoperative...what to do? Is it repairable? If so, where do I begin? Thanks.
Or to breaking the plastic lever.