SYSTEM DIAGRAMS 2YM15, 3YM20, 3YM30 - B (Keyless) - Type Instrument Panel (optional) SD Operation Manual 75 © 2009 Yanmar Marine International 1 Optional 2 Diodes 3 Buzzer 4 Engine Oil Low Pressure Alarm 5 Coolant High Temperature Alarm 6 Water in Sail-Drive Seal Alarm 7 Battery Low Charge Alarm 8 Fuse (3A) 9 SWITCH GLOW (I) / OFF (0) / STOP (II) 10 SWITCH START (II) / ON (I) / OFF (0) 11 Diode 12 Switch 13 Tachometer / Hourmeter 14 Instrument Panel (Main Station) (Op- tion) 15 Wire Harness 16 Wire Harness for Sub Panel 17 Water in Sail-Drive Seal Sensor Amplifier (Sail-Drive Only) 18 Procured by Customer 19 Battery 20 Battery Switch 21 Engine Stop Solenoid 22 Relay 23 Glow Plug 24 Stop Relay 25 Starter Relay 26 Starter 27 Coolant High Temperature Switch 28 Engine Oil Pressure Switch 29 Alternator 30 Ground Bolt 31 Sail-Drive Only for Sail-Drive 32 Coupler (View from A-A)