2004 - 225 Ficht starting problem

[Crystal]

Hi. I have a 2004 - 225 Ficht which works perfectly and starts without any problems.
The problem is that after running for about 15 min and switching off the ignition the ignition dies and the 3 bulbs light up from left to right.
After waiting for approx 10 to 15 min the engine starts up normally. The engine also stopped running after 30 min running on 2 occasions and same bulbs switch on.
On the diagnostics no faults are shown. My mechanic has replaced the ECU and various solenoids but remains the same.
Any body can help?

[boats.net]

May be a low voltage problem but when it is running good all test will read good, may have to connect to laptop to it and run engine till it shuts off then check system voltage and ignition voltage to see if are within range.