Tohatsu 4 Stroke MFS 2/2.5/3.5A Outboards Service Manual, Page 104Get this manual
36) Installation of Valves 1Place cylinder block on the work benchApply oil to valve guide and attach new valve stem seal 1Intake SideBlack Exhaust SideGreen Do not reuse the sealUse new one4st OIL
1 2Assemble valve 2, valve spring seat 3, valve spring and retainer in this order, and then, push in the assembly by using valve spring compressor attachment 6Valve Spring Compressor AttachmentPN3AB-99076-0