Loc: Just east of Graceland
My starter solenoid was working when it felt like it (would work every twenty or so tries), so I got mad and broke down and replaced it. About a flying hour later, I started getting a whine in my comms, about like a teenager being told his allowance was being reduced. I figured the capacitor on the alternator was showing its age, so replaced it. Didn't help a bit.
Yesterday I was going to go shoot some touch and goes. As soon as I turned on the master switch the prop started to turn. "Hmm," I thought, "That ain't right."
I opened the oil door, and the first thing I saw was that the insulation on the battery cable had melted, and was too hot to touch. When I opened the battery box, the lead terminal on the positive end had melted and pooled on the top of the battery. Some kinda hot, I imagine.
Apparently, my new starter soleniod shorted out internally, allowing power to the starter at all times. The noise I heard was the starter trying to be a generator, and all the confused electrons generated enough heat to damage my components.
I replaced the battery (no Concorde immediately available, so Gill), replaced the positive cable, and put the old, intermittent solenoid back on until I can get a replacement. Whine disappeared, and everything else operated normally. Fortunately, nothing else was damaged. Off I went, into the wild blue yonder.
Now, if I could only remember how to make them damned 'squeaker' landings!
I had that happen in a car but caught it before damage. You have done some (don't know how much) damage to your starter also. The solneoid you bought was clearly defective and you need a new one to repair this problem
Remember NEW does not = GOOD. It is possible to buy new, defective parts.
Single/Multi/instrument/type/commercial But then I am still learning.
Double check the solenoid! A starter solenoid should energize and release....a master or battery solenoid is designed to stay closed. They both look similar, if not identical. One way to tell is if they are rated "intermittent duty" for starter or "continuous duty" battery.