View Full Version : 99 205 with LT1 won't start

08-19-2013, 10:25 PM
The issue is with a weak spark on the ignition cycle. Local MC marina has tried various things with no success including switching ignition modules, new plugs etc and have been in contact with Indmar and MC. They are now looking at getting a new ECM, but are having trouble finding one. The calibration setting is A8e9heX.

Any thoughts, or anybody else had a similar problem. Boat was running just fine up to a couple of weeks ago when the starting problem arose and now it won"t even start.

Thanks, Grant

08-19-2013, 10:39 PM
sorry to read.. all connections clean - no corrosion anywhere? I did not think the ECM controlled the strength of the spark - or voltage level to coil packs. But what do I know... good luck on finding a solution.

08-19-2013, 11:07 PM
thanks. I think the ECM is a bit of a desperation move, but they are running out of good ideas.


08-19-2013, 11:27 PM
Maybe JimN can steer to you to a better option... the "weak" spark has me troubled.. didn't think the spark intensity was controlled.

08-21-2013, 10:18 PM
Did they check the crankshaft sensor?