Dean Showalter

Hey guys, I thought give an update in hopes it might help some others out there, especially Will.iam who said "Rats, I’m in the same situation except my annual is not til February." We ended up sending the boost pump regulator to Don Maxwell's shop in Texas. He has a contractor who repairs these units. It worked out very well. They turned it around in timely fashion and it worked great. I adjusted it for the proper fuel pressure on "LOW" setting and the owner is happy to have it working again. And for what it's worth, they returned the bad transistor to us that was replaced. If it was simple, I could have done that myself. But after taking the box apart, it looked pretty complex in there, just to change the transistor... all this to say, if I ever encounter this issue again and the part is not available, Don Maxwell Aviation will be the first thought on my mind. Thanks Don, and keep up the good work on Mooneys! Dean Showalter P.S. On this same airplane, I encountered a challenging issue with sealing up small exhaust leaks at the cylinder flanges / gaskets. I talked about it in episode 249 of the Airplane Owner Maintenance podcast, in case anybody cares to listen to it... I'm certainly open to more thoughts and ideas from others who may have had the same issue.

I really appreciate all the help on this. I called and spoke with Oli at Aeromotors, and had a great conversation with him... but they don't work on these boost pump regulators. And then I just got off the phone with Don Maxwell and he was very helpful as well. My next step is I have a local friend / previous avionics technician / A&P who used to have a television repair business... he's going to take a look at it and see if he can repair it... if not, I can send it to Don Maxwell for repair. At least now, we have uncovered some very good options! I'll keep you guys posted.

Thanks... I saw that as well, but when you try to add the part to the cart, it says "out of stock." We've not been able to locate one yet.

Fuel boost pump is not working in "low" position. It's an M20K, S/N 25-1187. We're doing an annual inspection and need to fix the issue. After troubleshooting, it appears the boost pump regulator P/N 880047-503 (model VR536) is bad. We can't find a new one. Anybody know of a shop that can repair this one? Or where we can buy a new or serviceable one? It's an Electrodelta part. Thanks!

I know this post is old now, but I just had to jump in here. In fact, I signed up mainly so I could give a good word for Don Maxwell. I work in a G.A. shop in Virginia, and I've spoken with Don a few times. He's been super helpful to me, and I respect him a lot. I don't own a Mooney, but I've worked on enough of them to be decently familiar. Thanks Don, and keep up the good work. In fact, as I am writing this, I'm thinking Don would make a great guest to have on the Airplane Owner Maintenance podcast... I'll have to consider contacting him about that.