hnorber

Thanks. I haven't checked - but will do so. I'm still having a little trouble understanding how an induction leak or air in the fuel line could create such a regular oscillation - but I can certainly try to check.

Thanks. A mechanic also thought it might be an air leak (maybe at the fuel selector valve) - but I don't understand how that would cause such a regular oscillation .

Engine is running smoothly, however the EGTs are fluctuating as well (so seems that it's not the sensor). You can see it in the linked data.

I've been experiencing a steadily fluctuating fuel flow (generally +/- .5 to 1.0 gph, or about 5-10%) for a very long time. The frequency is about every 7 or 10 seconds. It's pretty regular, although once in a while (maybe every 5th flight) it doesn't happen. Fuel pressure remains constant, and use of the aux fuel pump has no impact. Also, neither altitude nor switching tanks seems to have any impact on it (it even occurs during high-power runups on the ground). Any thoughts on what could be causing this? Could a diaphram in the fuel servo be sticking? (BTW - it's definitely NOT a transducer or probe issue, since my EGTs seem to fluctuate consistent with the fuel flow). Any thoughts would be appreciated! I'm pasting below a few links to my JPI data from random flights where this can be clearly seen:

Hello. I'm upgrading to dual GI-275s (and I have a GNS 530, as well as a KFC-150, which is why I chose the GI-275s over G5's). My installer seems to think that my autopilot doesn't have GPSS capabilities. I realize now that's not accurate - but my question is: will the GPSS function be available automatically, or do I need to ensure that my installer configure the GI-275s specifically to make GPSS available? Thanks!

Thanks for the recommendations! I'll definitely keep Steve Myers in mind for next year! I actually had him quote me some repair work on my cowl, but he was quite a bit higher than another highly recommended shop near me for that work.

Wondering whether anyone has a recommendation for a shop at KOSH or nearby to do my annual (1991 MSE). I'm having avionics work done at that field and was just asked if I could bring the plane in early April for 4-5 weeks (previously we discussed July). I'll be out of annual at the end of April, so it'd be ideal if I could have an annual done at the same time or right afterwards without needing to move the plane. Thanks in advance for any recommendations!

Thanks for the responses. I suspect that the tab is somehow bent incorrectly (I'll need to PT20J's picture to mine when I get to the airport next) OR that there's dirt/friction (I actually don't think it moves very freely - it seems to move okay in the top third of its range, but gets stuck there). I'm guessing WD40 is a bad idea- but happy to hear suggestions on cleaning it and getting it to move freely. Thx!

Yup - I adjusted the tab all the way up (up is early warning) per the instruction above before my BFR. Still didn't work at all.

Well - it's been quite a while since I started this post - but bringing the thread back to the original issue...I did my BFR last week and took the plane into full stalls (yes-with abrubt wing drops) and the horn didn't come on at all. It still checks fine on the ground. Does anyone have any thoughts on or recommendations on where to have it serviced? I'm in Chicago, and my regular mechanic (an extremely reputable shop - but doesn't specialize in Mooneys) is telling me that they can't do anything short of replacing the entire system.

That's right - no issues when I test it on the ground.

Thanks. I haven't tried slow flight yet since I've been breaking my engine in from an overhaul (trying to maintain higher power settings/internal pressures). I'll try slow flight shortly and also send some pictures of the stall vane. Thx

HI all. I have a 1991 MSE and the stall horn appears to work just fine when I test it during my preflight. However, I never hear the horn when I land (and I generally do fully stall prior to touch down). Wondering if maybe the tab isn't properly aligned or maybe bent incorrectly. Has anyone else ever dealt with this? My shop isn't much help. Thanks

Thanks!

Does anyone know why Flame Engineering stopped selling Red Dragon heaters? I've had one for more than 10 yrs - and it seems to have a recurring problem in the valve or regulator. I'm hooking it up to full propane tanks, but only showing about 5lbs of pressure (max - when pressing the boost button for ignition) and it won't light. Not sure if they still support existing units?