1987 Force 50hp head warpage.

[kbh121956]

Hello Group,
I am working on a 50hp, replacing the head gasket. What is the warpage amount before the head should be shaved?
Also, should any kind of a sealer be used on the new head gasket?

 

[racerone]

All outboard heads warp.----Resurface it with emery paper on a piece of thick glass.