"One battery should always be on. The alternator is for charging the battery(s), not as a primary source of power. If, however, the battery(s) do fail, the alternator should keep the engine running long enough to safely land."
"This is how we took compression on our Viking 130 aircraft engine. Necessary tools will also include a reliable automotive compression tester with 10mm thread adapter, spark plug socket w/magnet built-in to lift plug from deep well, and inch/lb…"
"Looking good. I'm sure there's a logical reason, but why didn't you weld on a longer exhaust pipe instead of using the spring attached extension? Understand the engines just at idle, but do you notice much sound differance after removing the…"
"I just noticed your question "Is it a big deal to connect the ECU power to the ignition switch?" The ECU should be powered by the main power bus, not the ignition switch. The ignition switch should only be to start the engine and possibly turn off…"
"To shutdown a Viking 130 quickly, you need to disconnect the battery(s) and alternator. We use toggle switch to open battery circuit, and starter switch to disconnect alternator. Note, some prefer a stand alone alternator switch. With regards to…"
"Looks good Ronald. You might consider closing off the back of the enclosure so all air is forced through the louvers. In theory, the louvers will cause a low pressure area to pull hot air away from the radiator. "
"Ok, now I get it. I didn't realise those were the small header tanks w/integral fuel pumps. Makes more sense to me now. Bob Jones has the only 701 in our area, that I can think of, flying around on floats and skis. "