Rspencer612

Not at this time Don!

I did not. Bought it that way.

It’s how I purchased the airplane! Ill have to look into it.......been signed off by both A&P’s and prop shop.......

Battery showed 12.6V directly connected to it before I started. I didn’t see what aspen showed prior to starting. But I started it and then found the Aspen page showing voltage and it shows 12.8v. So alternator must be providing some power as it was increased from the 12.6 the battery had prior to hitting the start switch. it may very well be in the main alternator cable I fixed. When I cut it back, it had corrosion, I cleaned it to shiny copper before repairing. Who knows what the other side and rest of the cable in the sheath looks like......... Out with the Meter and on the hunt I go!

I have a plane power system alternator and their voltage regulator accompanying it. I will run through the diagnostics on it as it’s all engine off master on. I’m not comfortable being up there with prop running, so if that’s needed likely a trip to the mechanic. And he is consulted on all my work, and handles my sign offs. him and I will be doing owner assisted annual starting 8/1 when it becomes a pumpkin, so I wonder if I can live with 12.8V until then.........

Ok guys. So cut off the end, cleaned wires, crimped new ring terminal, and put in new rubber boot protector. All is good and amp gauge back working like it used to. I charged battery to 12.6 before taking it out and doing the ground run test. I had not looked before, but my amp gauge lives in about the 30 charging range all the time. Turn on landing light it jumps to 60 (not sure the accuracy of the factory amp gauge). But I looked at my Aspens for voltage since I do not have a voltage gauge. Running engine idle or 1700 rpm, no change, I am seeing 12.8/12.9 volts to the Aspens. This seems low......I would expect 13.4+. Old wiring with voltage drop maybe? Any ideas? This will be the next issue to resolve.

Wow.............not good at all

I’m thinking you may be right! Looks like a cut back, crimp and reinstall is in order! But is still tight, so I am more leaning to rust and age. It’s plane power system, but battery cable looks original.......

Well guys, wiring. I don’t like the burned look, but maybe happened when connection was intermittent and loose causing heat?

What led you to diagnosing the bad old wiring? Voltage drop?

That’s the plan. Even printed it already. Just didn’t know if anyone has been down this road already!

Good evening guys, Did a short 35 mile run and back tonight to fill the tanks. No issues on flight out, but as I got back home and on the downwind, I noticed my Aspens both alert me they were going onto battery power, looked over and amp gauge reading no charge at bottom. I had noticed it on earlier flight kind of dancing around a bit. About 10 seconds later, I made a slight increase in power, and the amp gauge came back up and maxed out showing max charge. both Aspens went of battery power. Then just as fast as it came back, the amp gauge went back to zero all the way through shutdown, but both Aspens stayed on ship power and didnt go back to battery backup. GTN750, radio/audio panel, transponder, engine monitor, all stayed working with no message or indications. I do not have a volt gauge. The alternator inop light never came on until I shut the engine off though which was weird...........Any ideas? ill get the meter out tomorrow and follow their online troubleshoot form, but does this sound like an alternator or Voltage regualtor. Plane sat for a series of years, so it only has 30 hours on the STC install, but was installed roughly 9 years ago. 1965 M20C with a IO-360-A3B6D upgrade

I like that, a SUPER C! It’s sure super to us. A great performer! I’ve sure fallen for it! My boys have named him “Doc Zoomey”. Therapeutic fast and fun! Haha

It certainly has a few mods. IO-360 conversion and cowling, precise flight speed brakes, a few speed mods, dual aspens, GTN750, stec55x. Really enjoying it!

First 1/3 of the runway is uphill, and I would estimate about 800ft ground roll. It performs very well! Since we live here my wife catches most my landing and takeoffs, so I will likely lit them on my YouTube channel there. Good and bad haha! I love how fast the Johnson bar gear retracts, I have become a huge fan of it and the flaps on the Mooney!

I base my M20C at my home on T58 in Sanger. Be adding some grass landing and takeoff videos. I have found it to be a VERY capable grass airplane on smooth strips. My Q-tip prop has 10.5 inches clearance. https://youtu.be/Rr_S_lC82KE