Stop chasing intermittent start failures and mystery shutdowns in your Onan generator. The Dinosaur Electronics DIN300-3763 is a direct-fit replacement control board engineered specifically for Onan generators originally equipped with circuit board part numbers 300-3763 through 300-3763-04. Built with double-sided plated thru-hole technology and shipped with an attached wire harness, this board swaps in cleanly without splicing or rewiring.
Onan generator control boards in the 300-3763 family are a known failure point in RV generators. Heat cycling, vibration, and age cause cold solder joints and trace cracking on the original single-sided boards -- symptoms that show up as hard starts, random shutdowns, erratic RPM, or a generator that cranks but won't fire. Dinosaur Electronics addresses this at the manufacturing level by using double-sided plated thru-hole PCB construction, which creates more robust solder connections and dramatically reduces the intermittent-connection failures that plague aging OEM boards.
Dinosaur Electronics has been a trusted name in RV control board replacement for decades, producing boards purpose-built for the RV market rather than re-stamped OEM surplus. The DIN300-3763 is a drop-in replacement -- same connector, same footprint, same function -- with an attached wire harness that makes installation straightforward even in tight generator compartments.
More robust solder joints than original single-sided boards. Virtually eliminates intermittent connections caused by vibration and heat cycling.
Pre-installed harness connects directly to the generator wiring. No splicing, no fabricating leads -- plug in and secure.
Covers five Onan OEM part numbers: 300-3763, 300-3763-01, 300-3763-02, 300-3763-03, and 300-363-04. Verify your existing board number before ordering.
Dinosaur Electronics backs the DIN300-3763 with a limited 3-year warranty -- significantly longer coverage than most OEM replacement boards.
Onan produced a wide range of control boards across its generator families, and board numbers are not always stamped in obvious locations. Before ordering, locate the part number printed or silkscreened directly on your existing circuit board -- not on the generator data plate. The number on the board itself must be one of the following:
If your board carries a different prefix or suffix series, this replacement will not be correct. Dinosaur Electronics produces boards for numerous other Onan part number families -- selecting by the board number rather than the generator model ensures you receive the right unit.
If your Onan generator is exhibiting any of the following and the board number matches, the DIN300-3763 is a strong candidate for the root cause:
Rule out fuel delivery, spark, and oil pressure switch issues before replacing the board -- but if those check out, a failed control board is the next logical step.