1988 merc 90

[2quick4u]

So I have an 88 90hp. Has anyone ever milled the heads to increase compression for added performance? Currently at 120psi acrossed all 3 holes this is on a flats boat/carolina skiff. I was also looking at reeds. Either Boysen or Chris Carelson r ones is one better than the other at certain rpm ranges

[perfmarine1]

Pretty sure you can NOT mill the heads because that motor has no heads. What you see bolted to the back of block is a water jacket. Cylinder head is part of the block. Reeds will make little difference.