Thumbnail Filmstrip of 56-4902-00: Replacement Circuit Board for Onan 300-4902 & 300-5276-01 Images
Replacement Circuit Board for ONAN Generators
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).
It is built in the USA and backed by a 2-year Warranty.
Return Policy: Unwanted items may be returned within 30 days of the original purchase date. Refund/credit issued will be subject to a 25% per item restocking/re-test fee as long as unit is in new, undamaged condition. Shipping charges are not refundable.