Fuel System OverPressure 912IS

[Jaguar56]

Thanks for the feedback. That is what I was hoping to hear. I did study the system and figured out the bypass valve. That likely kicked in when the pressure shot up, but it was hard to tell. As you say it is nice to know the fuel flow won't simply stop. And it was interesting to see the Dynon tell me to land. That system is every bit the equal of what I had in the Cirrus.

I will just buy a few and have them ready when the pressure starts to work up.

[rosslr]

Yes Paul, I just order a few on line at a time and change them out ever 100 hr. I haven't had the prob you had but never know when you are going to pick up some rubbish in the fuel. And yes, the 912is system takes a bit of understanding and the warnings too. For instance, I went to start up recently and had a solid Lane B light - My EMS told me the EGT sensor was over heat ( although the engine was not running!) - obviously a sensor. Relatively easy fix ( expensive !) but what I didnt know and have since learned is that the EGT sensor info is not used by the computer to adjust fuel mixture - so it would have been fine to fly home if it happened somewhere. Apparently the system checks the injectors for that pot to make sure they are ok. I would carry a spare of them to but at $270 each I think that is a bit extreme!

good flying

r

[jiott]

Regarding the EGT sensor, if I haven't run the engine for 4-5 days when I startup the left side sensor almost always shows the red cross or a very high overtemp condition on my screen. I have learned to ignore it because in a few minutes of warmup it starts reading correctly and stays correct for the rest of the day. I have taken it out and cleaned it and checked the wiring but it has continued to do this for several years now. Probably should replace it; the right side never acts up.

[neville]

I also have the Kitfox fuel filter manifold and new filter arrangement. I have had the fine filter become clogged and get the high filter warning. I change the filter and all is well. Like Rossir I keep at least spares on hand and on any cross-country trip I carry a spare filter and a spare EGT sensor.

[jdmcbean]

We do keep the filters in stock if you're looking for them.

[Jaguar56]

Thanks John, just ordered them yesterday.

[Jaguar56]

Regarding EGT's, it was a constant issue with the Cirrus. It got so bad that people started ignoring them. But it was easy to dismiss when the EGT would peg out and then drop back in a few seconds.

With the Cirrus it was a connection issue. The connectors were junk. There was a guy who offered a package to replace them. It would usually eliminate the problem.

On the Rotax do they simply fail or is it a connection?