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200 ox 66 on plane stalls starts stalls starts ok

"two months ago at plane the m

"two months ago at plane the motor stopped (like no fuel) started right back up, stalled again, then started ok. then ok until yesterday. then yesterday it did the same thing....stalled, started stalled started ok and ran strong no problems.
i noticed the flow scan was loosing gph and then the motor would stop. i have checked the pick-up tube (no screen) and the elbow fitting from the tube to fuel line. it does not have a check valve and is clean. have not changed the fuel/water separator..yet. the sensor for the gph meter is right after the fuel/water separator.

in recent past, changed 3 low pressure fuel pumps, vst cleaning + new filter on motor, cleaned and checked o2 sensor.

any ideas?"
 
"sorry, not flat just very sof

"sorry, not flat just very soft. just checked low preuure pumps with vac. gauge. positve side ok @7.5 psi negative side test did not hold @ 4.2. still think they are ok, just changed last year."
 
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