Before I’d give up and start cutting, I’d keep at it with some heat and penetrating oils while applying short bursts with the impact gun. Maybe try heating the flywheel good and hot, then hit the crankshaft nut/threads with some CRC Freeze Off to create a temperature difference big enough to pop it loose?
Whatever approach, try not to end up with one that looks like this.
Attachments:
Bob
1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1957 Evinrude 3022
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20
1982 Evinrude 25hp
“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."