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Old 10-16-2018, 12:45 PM
Mich48041 Mich48041 is offline
Join Date: Apr 2008
Location: Riley TWP MI
Posts: 2,739

You are right Tom about the maintenance manual specifying flushing the fuel pressure hose at annual or at 100 hours. It would be interesting to know the reason for doing that. My philosophy is, if it is not broken, do not fix it.
Joe Gores
RV-12 Flying
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Old 10-16-2018, 01:51 PM
Piper J3's Avatar
Piper J3 Piper J3 is offline
Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 1,155

Just spit-balling here... maybe because that hose is dead-headed and residual fuel doesn't get used and goes stale so-to-speak?
Jim Stricker
Hinckley, Ohio
EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC
1130 hrs Flying 46 Piper J-3 Cub
RV-12 E-LSA #120058 AWC Jul 2012 - Bought Flying Oct 2015 with 48TT - Hobbs now 406

LSRM-A Certificate 2016
Special Thanks to EJ Trucks
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Old 10-16-2018, 02:21 PM
Azjulian Azjulian is offline
Join Date: Dec 2015
Location: Scottsdale, Arizona
Posts: 140

The scary thing in this case is that the debris wasn’t in the hose it was in the coupling from the hose fitting to the pump, so flushing the hose didn’t clear it
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Old 10-16-2018, 07:19 PM
dick seiders dick seiders is offline
Join Date: Jan 2006
Posts: 905

Interesting feedback,thanks. My plan is to pick up a mechanical fp gauge tomorrow and pull the floscan following psi test to determine what its problem might be.
Dick Seiders
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Old 10-23-2018, 08:02 PM
dick seiders dick seiders is offline
Join Date: Jan 2006
Posts: 905

Test using 0 to 15 fuel psi gauge clearly showed good fuel psi. Facet alone was 3.2 lbs. Rpm of 2000 was 5.88, 3000 4.8, 4000 4.0 4800 3.3 on static ground runs.
VDO was cleaned with brake cleanerand on subsequent tests ran just a little less than the 0to 15# instrument
at each stage.
Conclusion is that Joe Gores was right in his statement about fuel psi. But I may switch to a Kavlico for the greater reliability

Floscan problem turned out to be a loose ground wire.

Dick Seiders
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