PJ_M20E

I decided to stick with generator until next time... It should work out to less than have of cost of alt conversion and historically plane has had no appreciable electrical sqwaks. Of course if I end up pulling it out again next year...I won't be ashamed to acknowledge you told me so.

Got generator out, wasn't as bad as I thought to drop lower cowl. Bearings shot...full overhaul required. Wiring otherwise seems good. Want to clean engine compartment up good next week any suggestions?

I'll have to try again to get swivel rachet on one side of alt...didn't get that far. I don't see an area big enough to get generator out unless maybe with fuel injection boot completely removed maybe it will out left side. Will try to getit out Thursday, thx

I was looking at how to take generator out today, do you really need to removal lower cowl? It appears to be a time consuming under taking. I'm hoping there is a trick....

Thanks for everyone's input...narrowed flaw to generator. To be cont'd...

I'm hoping to find my own A&P to work with and have one lined up to at least lookhelp with current issue. Hoping to learn airplane and maybe save some money over time or pursue A&P which is why I'm looking into it. A little back ground, I've only had Mooney a few weeks and have only minimal experience as aircraft owner with maintenance...although generally technically / mechanically very capable just haven't delt with airplanes. The airplane is 65' 20E with IO-360 engine. Aircraft was annualed in Dec and check out fine. The plane was ferried from Ca to Phoenix around Christmas with no issues reported. First flight I went to take it up the ammeter indicated 0 charge durin runup. After much time spent turning things on/off I started monitoring battery voltage which by now was down to 10.3V and did not change whether engine was running idle or 1500RMP. I took battery home and charged it and it holds voltage thru several starts and power checks. I don't see any loose or broken or damaged wires. I checked polarity of generator today and think it is correct. I do think I have a possible short between generator output and ground. My suspecion is that there is some short at VR but won't be able to isolate it until I unhook wire from VR. any thoughts appreciated...

Hi everyone, I'm a relatively recent new Mooney owner and am trouble shooting electrical system for first time...well first time in mooney and airplane for that matter. I started to check polarity of generator and ran into some issues and questions that I'm hoping someone could provide some insight on. First question will really show I don't have a lot of knowledge here. 1. Generator (delco) has two wires coming out of it. The one marked "A" with the heavier wire which I assume is the output from generator and a small wire that I can't see a label on which is probably a ground or field wire. I was very surprised to see both wires went to ground (39 ohms) with master switch off is this correct? If if is correct, where is the ground VR or master switch? 2. Where is the generator field switch noted in steps below? 3. Should I need to flash generator can I use a car battery and jumper cables, or should I remove planes battery and bring it to front of plane? or find hot line in engine compartment? HOW TO FLASH THE GENERATOR’S FIELD: 1. With the engine off, disconnect the Generator Controller (GCU) / Regulator 2. Ground the Field wire removed from the GCU and turn on the GEN FLD switch At the GCU: Touch the battery wire to the generator’s armature wire 5 times for 3-5 seconds. Caution: Take safety precaution to prevent being hurt by electrical sparks generated by touching the two wires. 3. Connect a voltmeter between the generator’s ARM and ground. At 1300 RPM, the generator output or residual voltage should be >+1.6V. ARM Voltage ________V @ _________RPM