Flight Systems part number 56-4902-00 is an improved, direct replacement for the main control board used in several models of Onan Marquis Series Gen sets.
Features include improved circuit design, heavy duty relays, gold plated connector pins, lead-free RoHS compliant design and heavy conformal coating (to protect against corrosion - a major enemy of any RV generator control).
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R & K Products
3750 Metropolis Lake Road
West Paducah, KY 42086
Phone Toll Free: 877-503-9062