MikeOH

If you start looking at Fs, then I think the 'newest' is mid-70s; 45 years old! So, I'd be more concerned with the condition of the plane you are considering, rather than the year.

My bet is that M201K Turbo is spot on: your problem is NOT the Sonalert. Given your description of your own troubleshooting pretty much proves the problem is somewhere else in the circuit. The intermittent nature (per your description) strongly suggests an issue with the stall switch. I'd start with contact cleaner into the stall switch.

@M20Doc Did it have a prop strike? Just odd the logs available in the ad stop in 2019

Hmm, that one raises a couple of red flags. The logs on-line don't show any entries after 2019, yet the ad talks about a October 2021 overhaul. Then, you see the prop was OHed in April 2021. Sounds like a prop strike to me. Old avionics. I'm with philip_g; I'd much rather have a mid-time, known engine than a cheap OH to sell. (I practice what I preach; I bought my F with an over TBO engine that was consistently flown and maintained. Four years and four-hundred hours in and it's still running great!) IMHO, this is an overpriced paint job with no engine history and old avionics. I'd move on.

Not to come across rude, but is this really a problem? I'd be thinking twice about having my plane at airport where fuel theft goes on...not too tough to break in and steal avionics if the neighborhood is that bad! Just sayin'

The SC628 is 2.9kHz continuous The SC628D is 1.9kHz continuous The SC628P is 2.9kHz pulsed. See Mallory website: https://mspindy.com/products/audible-visual-products/industrial-panel-alarms/30mm-panel-alarms/

Citation? Or, is that just another opinion, like mine?

1 amu = $1,000 (aviation maintenance unit)

Doesn't seem right. I've had my plane for over 4 years and no issue. And, no telling how long they've been on the plane before my ownership. I will say I don't let them 'snap.' When I open them I use my other hand to let the latch open slowly.

@Bob R Did you see Skate's 10/16 post?

As part of my walk-around I check the brackets and hardware on the flaps. If they were down I wouldn't be able to do that without crawling under the wing front the front. When I extend them before takeoff I can check for even and smooth operation.

In my case, I had a bunch of time in an M20B when I bought my F; insurance was perfectly happy with counting my M20B experience. Picked up the plane from pre-buy after close and happily flew home. As others have said, you need to ask.

I ground lean very aggressively. To taxi I need to advance the mixture, not the throttle. For run-up I do NOT go to full rich, either. I can't remember the last time I've had a fouled plug. Boost for start, take-off, and landing.

I didn't learn to land well on my first try....or, my second....I'm sure glad they were in a rental C150 and not in my brand new to me Mooney! YMMV, but I doubt it

Ok, you reweigh your plane and come up with a new weight and CG. What happens to your W&B sheet? Does all the listed equipment 'disappear' into a single conglomerate number? How do you assign new weights and arms? Or, do you 'assume' they are all correct (tee-hee-hee) and just 'fudge' the empty weight and CG?

And, the lead time may be breathtaking, as well. I'd be more concerned with WHY the fuse blew, than with finding a suitable replacement. I'd just fit in a properly rated cartridge fuse; you can purchase them with pre-attached leads.

Yes, it's a MIL-F-23491 style fuse. Can be hard to find.

@Cody Stallings Would you recommend using the new NYCO grease vs. Aeroshell?

Thanks for the warning, but I'm well aware of the dangers of over doing it and rupturing the seals. I'm just talking about the normal annual maintenance where two of the zerks are removed and a small amount of fresh grease is pumped in until a bit comes out where the zerks were installed.

Do you want to buy a plane to work on, or to fly?

I've told this story here before...I've had this issue since I first got my plane. First, I sent the prop in for reseal and they accidentally overhauled it (but only charged me for a reseal since it was their mistake) but it still leaked...sent it back and they resealed it for free,....still leaked! I lived with it as I had become educated by then about the problems with Aeroshell 6. I bought some Aeroshell 5 and at last annual had my A&P/IA add the Aeroshell 5 (mixing Aeroshell 5 and 6 is now OK per a recent Hartzell SB; excerpt below). Yeah, it still leaks, but not nearly as much. My plan is to keep 'topping off' with Aeroshell 5 at each annual and hope it improves even more. Meanwhile I just live with wiping down the prop

I'm guessing he remembered to remove the cover on the GPS antenna

As fast as they are, Mooneys won't even make book speed with gear and TO flaps

Makes a TriPacer look downright sexy

Sounds good to me!