12. Electrical System18912.4 Alternator standard, 12V/60AThe alternator serves to keep the battery constantly charged. It is installed on the cylinder block by abracket, and is driven from the V-pulley at the end of the crankshaft by a V belt.The type of alternator used in this engine is ideal for high speed engines with a wide range of enginespeeds. It contains diodes that convert AC to DC, and an IC regulator that keeps the generated voltageconstant even when the engine speed changes.12.4.1 SpecificationsYanmar code 128271-77200Model of alternator LR160-741 (HITACHI)Model of IC regulator SA-A (HITACHI)Battery voltage 12VNominal output 12V/60AEarth polarity Negative earthDirection of rotation(viewed from pulley end) ClockwiseWeight 4.2 kgRated speed 5000 min-1Operating speed 1,050-18,000 min -1Speed for 13.5V at 20°C 1050 min-1 or lessOutput current for 13.5V 56A or more/ 5000 min -1Regulated voltage 14.4±0.3V (at 20°C, voltage gradient, -0.01V/°C)
