I am replacing the driveshaft bellow on my SP-C outdrive. I drained the fluid, removed bellow clamp then remove helmut bushing and then raised helmut. I removed the top gear box cover which exposed the top bearing. I removed the two nuts and the two allen head bolts. I can not get this gear box off. I tried prying, beating it with a rubber mallet and used a heat gun. No luck. Am I missing something here? Anybody else have this problem? Also the tag states it is a SP-C 872200 SERIAL 3102127772. Thanks to all.