Powerhead for 2005 F225

[grouper sandwich]

Not sure of the exact model number because it's not my boat, but I need to know what are the part numbers for the complete power head assembly? He looked his up a couple of weeks ago and needs to either replace the power head or buy a new engine. His mechanic gave him a price of $5k for the block and $4k for the heads. I don't know much those large engines, but that just seemed high to me. Thanks for any help you can provide.

[boats.net]

Number 1 in this diagram is short block, 2005 F225TXRD Yamaha Outboard CYLINDER CRANKCASE 1 Diagram and Parts
Number 1 and 8 are the heads, 2005 F225TXRD Yamaha Outboard CYLINDER HEAD ASSY Diagram and Parts
Check model number before ordering parts from these diagrams.

[grouper sandwich]

Thanks. I think he's leaning heavily to the new power option.