Honda BF20 BF2A Outboard Motors Manual, Page 36Get this manual
BFSOBFSA dVALVE GUIDE REPLACEMENT
REMOVAL: 1) Place shop towel in the space below the valve guide, and drive the valve guide down about 15 mm (a little over 112 inch)CAUTION: valve guides out, be careful not damage the cylinder block-
111 VALVE GUIDE DRIVER 0.07942-8920000
[2] COLD CHISEL
21 Using hammer and chisel, score the valve guide at the point
where it emerges, then strike the tip of the guide to break it
are eye protection when breaking the valve
VALVE GUIDE DRIVER No07942-8920000
3) Drive out the remainder of the valve guideIf necessary,
repeat step to gain additional clearance
INSTALLATION: 1) Drive in the new guide to seating depth of 18 mm (0.7 in)2) After installation, inspect the valve guide for damageReplace the guide if damaged