ltdoyle

It was overhauled in 2019

The engine was overhauled right at 500 hrs ago and that cylinder has never been off since.

Well, today sucked. Left Midway Waxahachie in my M20J and flew down to Temple and had lunch with my bud who is flying his Bonanza. On the return flight I just passed Waco and started getting a vibration. It started getting worse so I thought I better get on the ground and have a look at it so I did a u-turn and contacted Waco Tower. I told them I had a rough running engine and needed to land. As I approached the airport, the engine really started getting rough and I declared an emergency. Fortunately I landed without incident and taxied off the runway where the engine died. When I got out of the plane I saw it was oil leaking from the bottom of the engine. I pulled the top engine cover and saw the through bolt and two of the connecting bolts on cylinder number one were gone, and the case was cracked. I guess I was lucky I got it on the ground. In any case it appears I'm going to be looking for either an exchange engine or someone who can overhaul this one. Any advice would be great.

I was really happy with the oh done by Jewel, I think this is just one f those things that happens.

Standby vacuum

It is painted, overhaul was done by Jewell last April. I don't think it is patched, but maybe got thinned during inspection, bead blasting? I am thinking about draining the oil and cleaning it real good and trying a little JB Weld hi heat. If that did not work, then remove the pan and send it to someone like divco.

I have just under 100 SMOH on a Lycoming IO-360 installed in my J. The other day I went out and found a puddle of oil that had dripped down on the nose tire. After cleaning the engine and flying, I looked it over. What I discovered is a small oil puddle on the oil pan, directly above the intake tube. I would wipe it off, then watch it reform. Apparently there is a pin hole or very small crack at that location. Has any had this issue before and how was it corrected?

I had a similar problem on my 77. Does your dome light work? The dome light and electric clock are on the same circuit. It is fused with an in line fuse near the battery. Mine had blown.

"Caroline". It's a 1977 J model with WY as the N number alpha characters. In 1977, a girl named Caroline won Miss Wyoming.

Jay, sorry, I don't have a fuel flow or engine monitor, 201er, good point. I really can't say if I was leaned when taxing since it was a really short taxi. I have new Tempest fine wires, but a fouled plug could be possible. I have never seen peak EGT when full rich. Just hope it doesn't ever happen again.

I had the same problem. I removed the ground wires and the field wire and cleaned them with a wire brush (they did not look that bad). I also cleaned the terminals where they attach. Apparently that solved my problem.

I did a hot start and probably flooded the engine on my J model yesterday at Mineral Wells, Tx. It was probably 100 in the shade. No big problem though, I just did a flooded engine start and it started up and cleared ok. I taxied to the runway and did a normal run up and takeoff. After lifting off, I could feel a small vibration and just had that gut feeling that something wasn't right. I was full rich, full rpm, and wot. Everything looked ok, until I looked at my analog EGT, which was at peak EGT. I checked to make sure I was full rich, then I started to lean, but she told me that was a no no. At first I thought maybe I had broken mixture cable. When I got enough altitude, I pumped the throttle from wot to closed and back to wot and the engine cleared and EGT went back to normal. The rest of the flight was normal. I have about 30 SMOH, and have never run anything but 100LL.. In the summer, in Texas, I usually leave my cowl flaps open unless I get up high and cool. I can only guess I was maybe a little vapor locked. Anyone else have a similar experience?

I would suggest you remove the gear actuator, open it up, and inspect the gear Inside the actuator for wear. Once they get excessive wear, they will bind and pop the breaker, esp if you still have 20:1 gears.. Older Mooneys are supposed to do this every other year, and newer ones every 500 hrs. If you have a mechanic do this, I would watch, it's not as hard as it sounds.

Had a broken ground on the power unit, problem solved.....

Thanks Jetdriven. That is exactly what is happening! I just have to figure out what is causing the power supply to cause an over voltage!