No Power to Dash Gauges & No Start - Merc 5.0 MPI

Unsalted Mitten

New Member
May 8, 2019
10
Lake St. Clair, MI
Boat Info
240 Sundancer 2007
Engines
5.0 Mercruiser w/Bravo III
Hello All,

I ran into a no power connection on dash gauges for my 2007 240 Dancer 5.0 MPI Bravo III.

I was out on the lake all day the weekend before, got back to the slip without an issue. The following Saturday I went to start up and was not receiving power to the smart craft or any dash gauges. Blower, Cockpit/anchor lights, bilge pump, stereo etc all work fine. There is a single beep when engaging the ignition, but still no power at gauges and boat will not start or even "click" at the crank to turn over. I went to the main breaker to flip the small yellow switch to "reset" and it did not want to stay engaged. It kept loosely flopping back down. I am going to replace the 50A breaker today. Any other ideas or information would be greatly appreciated. Below is a list of things that I have tried.

- Replaced the main relay
- checked all fuses under dash and all OK
- checked all connections at the batteries for corrosion and tightness.
- Hard jumped the starter (spun but did not engage flywheel) normal?
- Removed dash panel and disconnected main smart craft harness and jumpers inspected for corrosion.
- Throttle is in Neutral
- Kill switch is on

Thank you very much
 
UPDATE: it was the 50A breaker located on the top end of the motor. Fired right up once replaced. $99. Corroded as all get out.

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