Honda BF75 BF100 Outboards Service Manual, Page 101Get this manual
HONDA BF75BFIOO
fNeutral Switch (Engine serial number 1300001 and subsequent)
A neutral start system prevents the engine from starting when the shift lever is in the FORWARD or REVERSE positionThe system's neutral switch consists of lead switch on one side and magnet on the otherA shield installed on the shaft either allows the magnetic force to reach the switch or obstructs the field, depending on the gear selected
NEUTRALSW
liJ SWITCH LEAD
SHIFT SHAFT
iJ PLATE SHIELD