Controls - 22 RT40 Operator’s Manual p Center Console Center Console Gauges 2 3 1 t14om004h.eps 1. Fuel gauge 3. Hourmeter 2. Voltmeter CMW Item Description Notes 1. Fuel gauge Displays fuel level in tank. Use #2 diesel fuel. Fuel tank holds 13 gal (49 L). 2. Voltmeter Displays system voltage. Should show 12-14V with engine running.