Replacement Generator Control Board for ONAN® 300-3764, 300-5342
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Uncertain if the problem is the Control Board, Voltage Regulator, or something else? Click here to download our handy Onan® RV Gen Set Troubleshooting Guide. Flight Systems' Manufactured Replacement Circuit Board for ONAN Marquis Generator Models BGM, NMH Flight Systems part number 56-3764-00 is an improved, direct replacement for the main control board used in several models of Onan Marquis Series Gen Sets. Features include improved circuit and harness design, heavy duty relays, added ignition circuit voltage protection and heavy conformal coating (to protect against corrosion - a major enemy of any RV generator control). It is built in the USA and backed by a 2-year Warranty. This board replaces the following ONAN part numbers: 300-3764, 300-3764-01, 300-5342 These control boards were used in the following Onan Marquis RV Gen Set Models:   • BGM: Spec B,C,D,E,F   • NMH: Spec B,C,D,E,F