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Showing results for tags 'wastegate'.
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I am a past owner (850 hours then sold in97) of a 1979 M20K with a GB engine with intercooler. I am trying to get back into flying and have been looking at the M20K. I would like to hear the opinions of pilots that owned and fly the K with a GB engine. All the talk I hear is negative about the GB engine. The Mooney I am presently looking at has a GB engine and none of the add-ons.
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- itercooler
- gami
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On a recent trip from Denver to San Antonio at 17k' with the engine set at cruise (29/2400), my MP suddenly dropped to 24 and the fuel flow had a corresponding drop. I immediately increased the throttle to bring the MP back up to cruise (it took close to full throttle). It seemed as if the turbo was no longer providing boost. While I verified the engine was otherwise running correctly and identifying my nearest divert, I felt the turbo kick back in and the engine came back to full power. This cycling continued every 10 minutes or so for the remaining hour of flight. We pulled the wastegate and the controllers and took them into the local shop for troubleshooting. The controllers appear to be the culprit. One is leaking oil, and the poppets are sticking on both--need overhauling. The overhaul is being done the week. I will let everyone know the outcome. Dave
