Removing Powerhead ???

[arm design]

Hello
I have a 25 hp yamaha 1995 vintage. I have a bearing problem and need to remove the power head. I have removed all the bells and whistles, linkage, carbs,oil resevoir,etc and then removed the 6 large bolts under the powerhead. The powerhad is still very not moving. i have wrapped it lightly with a block of wood and still no movement. do i need to loosen anything below in the lower unit? the motor only has about 10 hours on it. the gear lever is in nuetral. Help??

[boats.net]

No it should come off may have to pry up on engine to separate.