My scag lawnmower would not start. Nothing. They changed the ECM then it ran for 5hrs and cut off. This time it makes an attempt to start but will not run. The mechanic picked it up and said the new ECM I just put in needs replaced. Do anyone have an idea why the ECM's are getting damaged and they are pretty expensive. Kali
Quite possibily there was nothing wrong with either ECU(electronic control unit).
And there must be a warranty with them...after they change about ten of them, they may decide that all of them were OK in the first place...
Do check for voltage out put, this must be correct for proper functioning of electronics....
Yes, in the automotive field I'd do the same (switch parts), and I also know that this is NOT the correct way of doing things...and some things must be "pre-checked"..
One thing is the grounds, these must be perfect...another is the battery/charging system...
