Replacement Control Board for Onan 300-3056, 300-3687, 300-3950
Factory Direct Price: $119.00
Quantity in Basket: None
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New Replacement Onan Generator Circuit Board
*Please verify actual board P/N in gen set – many 300-3056 boards have been upgraded to the 300-3763.
Flight Systems part number 56-3056-00 is an improved, direct replacement for the main control board used in several models of Onan Emerald and 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: 300-3056, 300-3056-01, 300-3687, 300-3687-01, 300-3950
These control boards were used in the following Onan Emerald RV and Commercial Gen Set Models:
They were also used in the following Marquis Gen Set Models:
*If you are using this control in a model BGD or NHD generator, specs A-C, that has a built-in battery charger, please note: