2002 115 Evinrude trim button on throttle

[69 Alumacraft]

Trim switch at motor works fine, trim switch on throttle always goes down but is intermittent going up. I sprayed with wd40 and it will now go up but still a little sticky. The throttle is a side mount. My question is , how do I take the handle apart to get at the button? Once I get at it where can I get a replacement or can I clean up the connections and put it back together. I like to fish in the rocks and need the switch at the helm to work. Any advice, thoughts appreciated.

[69 Alumacraft]

Anyone? Stupid question, get a shop manual and figure it out? Just wondering if anyone has taken one of these apart. I only see the two big phillips head screws that attach it to the boat as a way to get at it, then what? Thanks in advance.

[Haffiman]

Remove the remote from the boat. Loosen the screw at the back in center if the handle some turns and smack it with a hammer. The handle should be loose.
Remove the screw and the handle is free.
The switch has to be replaced, not 'serviceable'.