Honda BF9.9A-BF15A Outboard Motors Shop Manual., Page 25Get this manual
MONDA BFS.9A-BF15A
0 PRESSURE TEST 1
OIL PRESSURE SWITCH
1) Check the engine oil level (P.3-2)2) Remove the mm pan head screw and oil pressure switch
4 mm PAN HEAD SCREW
3) Install the pressure gauge attachment (special tool) on the
oil pressure gauge that has scale calibrated to maximum of 1-2 kgcm2 (14.2-28.4 psi) scale and on the outboard motorCAUTION Tighten the gauge attachment 8.5 N-m (85 kg-cm, 6.1 ft-lb)Overtightening will damage the threads'
PRESSURE GAUGE ATTACHMENT NO07406-0030000
4) Remove the propeller and set the outboard motor in water tank or apply water to the outboard motor with the rinsing plug, and start the engine5) Measure the oil pressure when temperature reaches (216.0)Oil pressure [Engine speed 1,100