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wschertz@comcast.net wrote:
Steve,
You may have a marginal ground between the engine and the battery. When cranking, the starter dumps high current through the marginal ground, and the potential at that point rises, If the EC-2 is grounded through the same ground, then This would look like low voltage to the EC-2 and coils, even if the battery terminal voltage was not drawn down much. I would check all the engine ground connections. A little corrosion could build up and cause this effect.
Bill,
I have a large cable that runs from the battery to the engine block, and it is just for the starter. I have another ground cable, 12 gauge, that runs from the battery to the distribution buss for everything else. Same thing on the plus side of the battery. Big cable to the starter, and #12 to the distribution buss.
I think that the easiest fix, since I have two batteries, is to power all of the engine stuff from the forward battery, and then use the aft battery just for cranking. I still would like to know what has changed though. You may be right about some corrosion or something on a connection, but everything looks nice and clean, and all mounted inside the plane. Something though has changed to cause the problem.
Steve
Bill Schertz
I had extended the CAS wiring when I replaced the engine, so I decided to reroute the shielded CAS wiring, so that I could eliminate the unshielded wires, which were about 12" long. Same problem.
I am struggling with what to try next. This problem started before I swapped the engine, as it was very hard to get started, though for three years prior to that, I had no issues, and it started easily.
Has anyone else seen this type of problem, or have any suggestions ?Re
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