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  #11  
Old 02-26-2019, 07:42 AM
lr172 lr172 is offline
 
Join Date: Oct 2013
Location: Schaumburg, IL
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Quote:
Originally Posted by Deuelly View Post
Just a question, and trying to learn a little from the guys that know more than me. Could this somehow be a leaking primer problem? Or is there something indicating that wouldn't be a problem?
It would be quite unusual for an FI engine to have a primer setup.

Larry
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  #12  
Old 02-26-2019, 10:46 AM
drainge drainge is offline
 
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Location: Alameda, CA
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Right, no primer.

Just a note -- this engine (and red cube) have less than 300 hours since new. If the cube died it sure did it in a hurry.

How can I test the functionality of the cube?

I'm going to pull the cowl today and examine the linkage and mixture cable for any issues. If I don't find anything there I'll look at the fuel injection system.
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  #13  
Old 02-26-2019, 11:35 AM
lr172 lr172 is offline
 
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Originally Posted by drainge View Post
Right, no primer.

Just a note -- this engine (and red cube) have less than 300 hours since new. If the cube died it sure did it in a hurry.

How can I test the functionality of the cube?

I'm going to pull the cowl today and examine the linkage and mixture cable for any issues. If I don't find anything there I'll look at the fuel injection system.
If done on the ground, pull a line downstream of the cube and put some type of valve on the end to control the flow. Nothing fancy. Adjust the valve to get a reasonable flow rate (around 10-15 GPH) with the boost pump on. Then, with instruments on, hit the boost pump and a stop watch at the same time and find the number of seconds to fill a one gallon container. Then do some math and compare the actual flow to what your EMS was displaying as the flow.

If all of your investigation points to the cube, you can test it in the air. Playing around with the mixture around peak EGT and look for anamolies. Sounds like you have a good idea of what it should present. They usually don't fail a little. It is usually pretty significant and 300 hours is not uncommon for a failure.

You can put a coffee filter in your funnel and put the gas back in your tank when done.

From all that you have posted, my money is not on the red cube as the problem.
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Last edited by lr172 : 02-26-2019 at 11:41 AM.
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