Hello all. Im trying to remove the lower end on a 1977 Johnson outboard (75ELR77S). Removed the 4 bolts around the edges plus the one under the trim tab. Still frozen on. Tapped on the fin? type thing that runs around the entire lower end as this is the only thing to get leverage on. If I bang harder Im sure the fin will give before the seal breaks. Any ideas other than heat/wd40?? I havent tried that yet, but havent had any luck with those methods in the past.