Hello I'm writing on behalf of a friend who's been told by his French boat yard that his fourwinns day cruiser is not fixable Following a flat battery, the cables were crossed when jump starting. Smoke and flame observed.
Before giving up I thought I would try this forum to see if anybody can help with the following questions.
The Ecu unit is definately broken.
1) Can the ECU be tested ? Might a Volvo penta agent have a test rig?
2) Is there a diagnostic connection?
3) Does the ECU hold a memory of problems?
4)What other components could have been damaged and might they harm a new ECU if we replace it?
5)What manual would you recommend?

I should that the motor engine turns over perfectly well with the starter but wont fire
Year of boat 1998
Engine Volvo penta 4.3di