Stuck Powerhead

[GaryKast]

Anyone have any tips to remove a stuck powerhead. I have a 1990 V20
with a Yahmaha 225 EXTD engine. I broke about half of the bolts trying to
remove them(without breaking). Now the powerhead is stuck. I tried heat and beat, CRC, WD40, PB blaster. Had a hoist hooked up to the point of the boat coming off the trailer. The motor runs fine but the water tube from the lower unit to the power head broke in half. Boat is in pretty good shape.