Honda BF115A, BF130A Outboard Motors Shop Manual., Page 452Get this manual
HONDA BFI15AaBFISOA
METER INSTALLATION
Meters should be installed on the mounting panelIf any other location is selected, it will be necessary to use mounting plate with thickness of 116 716 in (2 11 mm)
Speedometer Tube Installation
Cut off about 118 in (3 mm) of the nipple end of the outboard motor sensor, then insert it into the speedometer tubeAttach securely with cable tie
If mounting plate thickness exceeds 0.44 in (11 mm), the mounting bracket must be modified accordinglyTighten the mounting nuts evenly on both sides
5Meter installation angle should be within 45' to '
If boat has magnetic compass, install tachometer minimum of in (130 mm) away from the compassMeter Part Number Hole Saw Size Tachometer 37250-ZV5-950AH 338"(86 mm) Trim Meter 37260-ZV5-821 " mm) (54 Speedmeter 06372-ZV5-910(86 mm) 10-65 mph Speedmeter 06372-ZV5-950AH 338"(86 mrn) 5-35 mph Hour Meter 39700-ZV5-912 'a(54 mm) Hour Meter 39700-ZV5-800AH 2116"(52 mm) Voltmeter 37450-ZV5-911(54 mm)Set selector switch to pole alternator position