BING 64 FLOATS

Roger -

I do not have a pressure gauge or Flowmeter but I would think Ed Babovec, the A&P, should? I can ask.

I know Ed B. up in Colorado.

Roger -

You were my first choice, as we've discussed prior, to perform this Rubber Replacement but having these issues, flying to you was no longer an option.

He's told me that he has spoken with you in the past. I hope He contacts you with anything on my plane.

Thank you again for all your advice and comments. I don't always understand, due to my lack of mechanical expertise, but I trust you always.

I'd sure hope to meet you someday.

Roger - 

I just remembered that I did do something prior to the issues experienced above. I noticed some external cracking in the fuel return from the tree (on top where one of the ports is for Fuel pressure sender) that runs to top of gascolator. I replaced that line not too long before the first experience with the engine shudder.

Now upon reading several questions and answers regarding the return line, I question that this is the proper install to begin with.

Several write that a return line is to go back to the tanks which would seem to tell me that instead of the gascolator top, line should go prior to the gascolator. Also, there seems to be some mention of a restrictor in the line.

Thoughts?

Larry

There are many aircraft that have return hoses going back to the gascolator. Flight Design's fleet with carb engines does this without any issues. They also just started doing it with their new aircraft with the 912iS. Other aircraft both owner built and Mfg built have them too. I know what the manual says, but these other installations seem to work. In the carb 912 there isn't that large of re-circulation like it is in the 912iS. The return hose keeps fuel moving so it doesn't heat soak and helps some on the pressure side, but so long as the return line goes back into cooler fuel right out of the wings I personally don't see an issue.

I'm sure others here including Rotax may have other views, but when you have thousands of aircraft that successfully do it that way what can you say.