Service manual

3. Electrical Parts
3-37
3.3.8 Tachometer (with hour meter)
SDG25S-6A7,SDG45S∼150S-6A6
SG06028
The figure shows the tachometer at of SDG25S/45S/125S/150S
(1) Specifications
SDG25S/45S/125S/150S SDG65S/100S
Operation voltage 10∼16V 20∼30V
Operation temperature -4∼140°F (-20∼60℃)
Revolution ratio (pulse type) 2 revolutions per 1 pulse
(2) List of functions
Pin No.
Line
color
Connection Function
1 B Grounding
2 W
Alternator
[Auto start unit CN6-2
terminal]
Input of hour meter function signal
3 R/W 10A fuse Power supply for tachometer
4
G/W
(W/G)
Tachosensor + terminal
[Emergency indicator CN15-2
terminal]
Detection of engine revolutions
Male
coupler
Y/W Panel light switch Power supply for lighting
Female
coupler
B Grounding For lighting
The connection in parenthesis [ ] shows that of SDG125S/150S.
The line colors in parenthesis ( ) shows those of SDG100S/125S/150S.