AN ACR FK10 CREW HAD TO CANCEL THEIR TRIP WITH AN ACFT EQUIP PROB FUEL CTL LINKAGE. ACFT EVACED AT GATE.

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UPON ATTEMPTING TO START ENG #1; IGNITION SWITCH WAS PLACED IN CONTINUOUS #2 POS; START VALVE OPENED; AND START SWITCH TO #1 AT APPROX 24% N2; FUEL LEVER #1 WAS PLACED TO OPEN POS. AT THIS TIME; THE FO FELT AN UNUSUAL RESISTANCE; BUT THE LEVER WENT TO THE TOP. AFTER APPROX 15 SECONDS; THERE WAS NO FUEL FLOW AND NO LIGHT OFF. WE DISCONTINUED THE ATTEMPT. THE FO TRIED TO PLACE THE FUEL LEVER TO SHUT; BUT IT BOUND. WE NOTIFIED MAINT. ONE OF THE MAINT PERSONNEL JIGGLED THE FUEL LEVER. THIS MAY HAVE ALLOWED FUEL FLOW ON A SUBSEQUENT MOTORING OF #1. MAINT SAID PROB WAS IN LINKAGE TO FUEL CTL. THEY ACCOMPLISHED TROUBLESHOOTING. MAINT CAME TO COCKPIT AND SAID HE WAS PULLING IGNITION CIRCUIT BREAKER BUT ONLY PULLED CIRCUIT BREAKER FOR #1 IGNITER. HE THEN ASKED US TO MOTOR #1. THIS RESULTED IN FUEL FLOW AND LIGHT OFF AND HOT START; WHICH WAS STOPPED BY PULLING THE FIRE HANDLE. WE INFORMED MAINT OF OVERHEAT; AND THAT FUTURE ATTEMPTS WOULD CAUSE FUEL FLOW. MAINT THEN PULLED IGNITION #2 CIRCUIT BREAKER; AND ASKED FOR ANOTHER MOTORING OF #1. WE ADVISED THAT FUEL FLOW WOULD RESULT. HE INSISTED; SO WITH MAINT IN COCKPIT AND AT THE ENG; WE MOTORED #1 AGAIN. FUEL FLOW BEGAN AND FLUCTUATED BTWN 1200 AND 700 LBS PER HR FOR THE 2 MIN MOTORING. WE STOPPED THE MOTORING BY PULLING THE FIRE HANDLE. MINS LATER WE WERE ADVISED OF FIRE COMING FROM #1. THE CAPT FIRED THE AGENT; AND WE LEFT THE ACFT. SUPPLEMENTAL INFO FROM ACN 364075: MAINT SAID LATER THAT THE PROB WAS NOT IN THE FUEL CTLR BUT IN THE LINKAGE. WE INFORMED MAINT THAT FUTURE ATTEMPTS WOULD PROBABLY HAVE FUEL FLOW WITH THE SAME RESULT. WE INFORMED THE AGENT THAT THIS ACFT WAS DEFINITELY GOING TO BE PULLED OTS; AND WE DECIDED AT THAT TIME TO DEPLANE ALL PAX WITH ALL THEIR CARRY-ON BAGGAGE. THEY ALSO USED A MECH RUNNER FOR COMS BTWN THE COCKPIT AND THE REAR OUTSIDE OF THE ACFT. THERE WERE NO INJURIES TO ANY PAX OR CREW MEMBERS. THERE WAS NO DAMAGE TO ANY PERSONAL POSSESSIONS OF THE PAX OR CREW MEMBERS.