gdwinc

Here is the order form from when I bought them for my Ovation. It has the part number detail. You’ll see two different part numbers - one of them was for gear warning and the other for stall warning.

Flying back from OSH this year (in my low and slow experimental) my son and I stopped in Granite Falls, MN (KGDB). It has what looks like a very nice WWII museum on the field. We didn't have time to check it out, but the nice lady at the front desk let us poke our heads past the first hangar into the restoration hangar. It's on my list to fully check out the next time I'm heading that direction.

My Ovation spent time in Europe and Mastenbroek Aeroskill maintained it the last few years it was there. I put the plane under contract while it was in Europe, subject to a satisfactory pre-buy evaluation back here in the US. The plane came out with a clean bill of health at the Don Maxwell pre-buy inspection, and was noted to be in impeccable shape. I don't know what it cost to have the plane maintained by Mastenbroek (I suspect it was very expensive given the extensive log entries), but they did a terrific job.

I’m curious how you fixed the lights in the Moritz. I recently lost two backlights on mine.

Here's a picture of the valve face showing the asymmetry. I also included a picture of the seat where you can see an inconsistency where the valve is making contact with the seat.

@JimB Yes, I'm a Savvy customer. I sent them the pics of all the valves, but I noticed that the exhaust valve on cylinder #4 was asymmetric and pointed it out specifically when I posted the ticket. They agreed that it looked like a good candidate for lapping. @M20F asked about the compression of the cylinder. This was just an oil change and so a compression test was not completed. The last compression test was done in March during the annual inspection. I don't have the log entry in front of me, but I do know that none of the compressions were low enough to be on the "let's keep an eye on this one" list.

Huy was the first one I called. He was the tech who told me it’s not worth the labor and to fly with the valve as is until it fails a confession test. The good news is that I found a tech to do the job - Mike at Scud Air Solutions at KOGD. I have an appointment next week. Just for fun, I’ll endeavor to update this thread with a before and after pic of the valve after it gets some hours following the lap job. Thanks to every who offered suggestions and advice. It is much appreciated!

Precision Air Power at Bountiful is a no-go. They only work on cylinders when pulled from the engine. Do any of the other Utah folks here have suggestions for an A&P who would be willing to lap the valve in place? Thanks!

@Utah20Gflyer I have not contacted that shop. I think it’s called Precision Air Power. I’ll give them a call tomorrow. Thanks for the suggestion!

@philiplane Thanks for this info about lapping a valve on high time engines. Before I bought the plane, the engine had a top overhaul less than 800 hours ago. So while the engine is at TBO the cylinder itself doesn't have all that many hours.

@KSMooniac Thanks for the response. I should have mentioned that I am a Savvy customer and they provided options for more accommodating shops. The recommendations were in Grand Junction, CO and Boise, ID so not the most convenient, but doable if there aren't any local Salt Lake area options.

When I change the oil on my Ovation I pull a spark plug from each cylinder and take some pictures with a borescope. My last round of pictures shows that the exhaust valve on my #4 cylinder is showing a bit of asymmetry. I had thought getting the valve lapped in place was a pretty common maintenance task, but A&Ps at two different shops that I have used in the past aren't interested in lapping the valve. One said that he doesn't believe in borescope pictures on high time engines (I'm right at TBO) and it isn't worth doing the work. The other said that it is a lot of labor and his recommendation is to wait for the cylinder to fail a compression test and then replace it. I'm based in Salt Lake City, so my real question is if any of the other Utah based pilots have an A&P they would recommend. If you have a suggestion for an A&P please let me know. My other questions are whether or not anyone else has faced this issue, and if you think I'm off base in lapping a valve on an engine that is at TBO.

I am by no means an expert, and am not sure about Google Bard, but the ChatGPT AI was modeled on information through September 2021 and is thus unusable for real-time data.

This is an old thread, but I searched Mooneyspace and didn't see any reference to the gear warning switch on the Ovation, so I thought it worthwhile to share in case another late model owner is chasing down a gear warning issue. I recently had an inop gear warning on my Ovation and had to track down the gear warning switch. I looked at the throttle cable right behind the panel and didn't see the switch that is pictured earlier in this thread. I reached out to Savvy and @kortopates pointed me toward looking on the engine side of the throttle cable. And, sure enough, right where the cable attaches to the throttle body is the small switch as seen in the picture below. Hope this helps someone down the line. Cheers, jamie