Dead Engines - No ignition

[Maluhia]

I have a 92 Carver 534 with twin 7.4L Mercruisers. We recently had a new inverter installed and the electrician noted numerous problems with the boats electrical system that we agreed to have repaired. We replaced 4 batteries, replaced battery breaker switches, installed ACR's and rewired the main electrical panel. Before this was done the boat ran fine, we just didn't have a split bank and no way to operate 110v equipment when we were off shore power and the boat does not have an installed genset. After all this work was done, the next time we used the boat it started fine and took us to our destination, but would do nothing when it was time to pull anchor and go home. Neither ignition worked for either engine. No click, nothing. Batteries were fine. Boat was towed back to the home marina and the electrician could find nothing wrong. We checked all breakers we could find and found nothing wrong. Ignition fuses were changed. Still nothing. The starter circuit isn't that complicated and it has to be a problem that effects both engines. Any ideas?
Maluhia
92 Carver 534

[Lyndon670]

Too many things to look at. Did you try running power directly to the starter(s)? Start working bacwords from there. Could be something as simple as a bad ground...

[waybomb]

Crazy things happen - are both neutral safety switches good?
As Lyndon says - are the ground shared? Could simply be a loose nut.

[Maluhia]

Lyndon670 and waybomb,
Thanks for your input. That is what I was thinking. Most likely it will be something simple that is common to both starters and ignition switches.

[Nplbw]

Were you able to determine what the problem was and fix it?