So I replaced one 3.3 set of bearings by buying a crankcase with bearings installed for about $16 shipped on ebay. I also replaced the bearings on my other 3.3 by hang. Oh my gosh that was hard!!!! I read so many posts to just heat up the engine to 150* and tap it on wood and they pop out. I tried heating and freezing and I BEAT a 2x4 and the bearings wouldn't budge. The front bearing was easy to get out - I just stuck a long socket in from behind and tapped it. The back bearing was nearly impossible. It took me a good 45 minutes of prying very carefully with pliers to get it out (in pieces). Do yourself a favor and buy the crankcase with bearings.