I flipped the pump switch (which all worked great when engine runs were
done over a year ago)
Joe Horton,
Dr. Deans plane newly registered as N657CJ
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Joe,
The limited research I've done indicates the pumps don't like to be run
dry for any amount of time, like a minute or more. You didn't indicate
if any of your test was with no fuel. If they / it worked fine with
fuel and now is intermittent I'd replace the pump and limit it's
operation to fuel only runs.
211LF has no gravity feed and no engine driven pump. It must have at
least one pump running continuous any time the engine is running. 20
years and 900 hours would indicate they are quite reliable. 211LF has
two facet pumps in parallel running through an adjustable fuel pressure
regulator to the Marvel Schebler carb. For the 20 years I flew 211LF I
used both pumps on T.O.& landing and alternated their use during cruise.
As always, YRMV...........................
Larry Flesner
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