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  #1  
Old 04-13-2019, 11:30 PM
n518jh n518jh is offline
 
Join Date: Jan 2015
Location: Sun City West, AZ
Posts: 35
Default Fuel Flow Transducer problems

For about a year my fuel flow reading on my Dynon 180 shows very low to zero GPH. Someone not too recently commented that he took his transducer apart, when he had that problem, cleaned it and it seemed to return to normal flow recording.
Has anyone checking this thread done that, and how hard is it to do? Mark
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Old 04-14-2019, 05:09 AM
JBPILOT JBPILOT is offline
 
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Location: Jesup, Iowa
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Default I have done it 3 times I think - -

Just remove it and fill it 3/4 full of carb cleaner. Shake it as hard as you can for maybe 2 - 3 minutes. What I found last time is, after you dump it out, fill it 3/4 with WD-40 and shake it some more, then flush it with starter fluid and blow it out by mouth. Put a clean cloth over end to avoid a bad taste in your mouth. Mine has worked for months now perfectly. If it is very quiet where you are, you should be able to hear the wheel spinning inside. If it stops very quickly, you may need to repeat.
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Old 04-14-2019, 05:58 AM
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DanH DanH is offline
 
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John's approach is worth a try. Can't take a red cube (EI FT-60) apart without destroying it.
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Old 04-14-2019, 09:13 AM
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Pilot135pd Pilot135pd is offline
 
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Regarding the Dynon D-180 fuel pressure, mine shows something like 17 gph with the electric fuel pump on while flying and when I turn it off it seems to go down to the expected gph. Is that normal?
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RV-8 N52VM : Dynon D-180, GTX327, SL40, Garmin 496 GPS, AP74 Autopilot, Titan 0-360A1A2N, Nickel Coated Cylinders, 2 Slick mags (both impulse coupled), engine preheater, Hartzell Plane-Power alternator, Hartzell HC-C2YR-1BFP constant speed, blended airfoil

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Old 04-14-2019, 10:21 AM
n518jh n518jh is offline
 
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JP Pilot, Thanks for the advice on cleaning the Fuel Transducer. I'll try it when the fuel tank is close to empty. I assume there is no shut-off from the fuel tank. Mark
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Old 04-14-2019, 10:31 AM
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DanH DanH is offline
 
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Quote:
Originally Posted by Pilot135pd View Post
Regarding the Dynon D-180 fuel pressure, mine shows something like 17 gph with the electric fuel pump on while flying and when I turn it off it seems to go down to the expected gph. Is that normal?
Normal if the cube is between the electric pump and the engine driven pump.

Not normal if between the servo and the flow divider.
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Old 04-14-2019, 10:46 AM
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Pilot135pd Pilot135pd is offline
 
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Quote:
Originally Posted by DanH View Post
Normal if the cube is between the electric pump and the engine driven pump.

Not normal if between the servo and the flow divider.
I'll go figure that out today, thanks.
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RV-8 N52VM : Dynon D-180, GTX327, SL40, Garmin 496 GPS, AP74 Autopilot, Titan 0-360A1A2N, Nickel Coated Cylinders, 2 Slick mags (both impulse coupled), engine preheater, Hartzell Plane-Power alternator, Hartzell HC-C2YR-1BFP constant speed, blended airfoil

Exempt by 3 out of the 10 ways but I still donated.
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Old 04-14-2019, 02:50 PM
JBPILOT JBPILOT is offline
 
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Default Mark -

Shutoff is before flow sender. Don't have to drain it. Shut off flow, drain gascolator, pull sender.
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Old 04-14-2019, 03:35 PM
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Pilot135pd Pilot135pd is offline
 
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Location: Ben Wheeler, TX
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Quote:
Originally Posted by DanH View Post
Normal if the cube is between the electric pump and the engine driven pump.

Not normal if between the servo and the flow divider.
Found the electric fuel pump right beside the left rudder pedal where the fuel tanks come out of the wing and from that pump it goes with stainless steel hose through the firewall. I didnít take the cowling off so I suppose the cube is between the two pumps.
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RV-8 N52VM : Dynon D-180, GTX327, SL40, Garmin 496 GPS, AP74 Autopilot, Titan 0-360A1A2N, Nickel Coated Cylinders, 2 Slick mags (both impulse coupled), engine preheater, Hartzell Plane-Power alternator, Hartzell HC-C2YR-1BFP constant speed, blended airfoil

Exempt by 3 out of the 10 ways but I still donated.
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  #10  
Old 04-14-2019, 10:37 PM
n518jh n518jh is offline
 
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Location: Sun City West, AZ
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Default JB Pilot, Thanks for that information

I have the plane apart for Annual Condition Inspection, so its a good time to look into this. Mark
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