Honda BF50 (5HP) BF5A Outboard Motors Shop Manual., Page 44Get this manual
BF5006F5A 3) After installing the new valve guides, ream the guides with the
Valve Guide Reamer (special tool)Always turn the reamer clockwise, never counterclockwiseContinue to turn the reamer as pulJ it out the valve guides
E GUIDE REAMEI
dVALVE SEAT RECONDITIONING
1) Resurface the valve seat with 45O cutter, removing only enough material produce smooth and concentric seatNO.On81-WlOl W
Turn the cutter clockwise, never counterclockwiseContinue turn the cutter as you lift it from the valve seatNo07780-0010200 (5 4'
07780-ooi2ioo3'
2) Use 3' cutter to narrow the seat standard width, thenmake light with the cutter remove any possible burrs at the edge of the seat