SYSTEM DIAGRAMS B-Type Instrument Panel for 3YM30, 3YM30, 3YM20 and 2YM15 SD Operation Manual 65 © 2009 Yanmar Marine International 1 Alarm Lamps 2 Buzzer Oil Pressure 3 Coolant Temperature 4 Sail-Drive Seal 5 Charge 6 Fuse (3A) 7 Stop Switch 8 Diodes 9 Key Switch 10 Instrument Panel 11 Tachometer Hour Meter 12 Wire Harness Option (L=3M) 13 Wire Harness Option (L=6M) 14 Amplifier (only for Sail-Drive) 15 Relay 16 Glow Plug 17 Engine Stop Solenoid 18 Battery Switch 19 Allowable Length by Cross Sectional Area of Battery Cable 20 Procured by Customer 21 Battery 22 Stop Relay 23 Starter Relay 24 Starter 25 Coolant Temperature Switch 26 Engine Oil Pressure Switch 27 Ground Bolt 28 Alternator 29 Sail-Drive Only 30 Coupler (View from A-A) Color Coding R Red B Black W White L Blue RB Red / Black LB Blue / Black YW Yellow / White YG Yellow / Green WL White / Blue WG White / Green GR Green / Red O Orange WBr White / Brown