I just got an used 1999 Mercury 3.3hp outboard motor. The engine works fine but I cannot switch it from neutral to gear. The plastic lever is stuck and won't budge. I have read that it is a common problem with those outboards. Unfortunately, the penetrating oil didn't help much and trying to push the handle out with a screwdriver from the access port was also unsuccessful. Looks like the handle is seized pretty good. Any ideas how to free it up so I can lube, put new o-rings and get it working again?