Small Engines (Lawn Mowers, etc.): Sprocket Removal, mower blades, reel mower

Question
Thank you for the service you provide.  I hope that you can help.
I am having difficulty removing the sprocket from my 17" MkhlcLane reel mower, model17-3.5RP-7-SP.  I have removed the set screw from the sprocket but the sprocket won't slide off the shaft.  Is there anything else that needs to be removed?  I need to remove the sprocket in order to attach an adaptor to sharpen the mower blades.

Answer
Make sure there is not a second set screw...usually there is only one.

The sprocket is seized to the key and shaft...happens all the time.  You can use a bearing seperator tool and a gear puller to remove the sprocket.  You can try soaking with PB Blaster for a few days to see if that helps.  Lightly tapping the sprocket with a small hammer and punch will help the PB Blaster soak into the key/shaft.

Eric