FLC ALLOWS ACFT TO EXCEED 250 KIAS BELOW 10000 FT. CAPT ADMITS THAT HE DID NOT ARM THE AUTOTHROTTLES PRIOR TO TKOF; YET HE OPERATED AS THOUGH THE AUTOTHROTTLES WERE FUNCTIONING.

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PUSHBACK WAS 37 MINS LATE DUE TO LATE INBOUND ACFT AND MAINT PROB PRIOR TO PUSH. TAXI OUT WAS SHORT AND NO OTHER TFC. FO WAS FAIRLY RUSHED DUE TO LOW TIME IN THIS ACFT; AND WITH THIS AIRLINE; NON-USUAL 'BLEEDS OFF' TKOF PLANNED DUE TO GROSS WT AND SHORTER TAXI. TKOF CLRNC RECEIVED AND CHKLISTS COMPLETED ALTHOUGH I FAILED TO ARM THE AUTOTHROTTLES AND THIS WASN'T CAUGHT ON CHKLIST COMPLETED BY FO. AT 'TOGA' ACTIVATION DURING TKOF ROLL; THROTTLES OF COURSE DIDN'T ADVANCE TO TKOF N1. I HAD ADVANCED THROTTLES CLOSE TO TKOF N1 PRIOR TO 'TOGA' AND I BELIEVED THAT WE HAD OBTAINED 'THROTTLE HOLD' NOW. I MANUALLY ADVANCED THROTTLES TO TKOF N1; NOT REALIZING AUTOTHROTTLE WAS OFF. AT 5000 FT MSL LEVEL OFF; FO PROCEEDED WITH THE REMAINING 'BLEEDS OFF TKOF' ITEMS AND I DISTRACTED MYSELF BY WATCHING THIS PROC DUE TO FO'S LOW TIME IN THIS TYPE ACFT. WITHOUT THROTTLES RETARDING; AIRSPD REACHED 300-310 KIAS AT 5000 FT MSL LEVEL FLT. THROTTLES WERE THEN MANUALLY RETARDED AND ACFT SLOWED TO 250 KIAS AND AUTOTHROTTLE WAS SELECTED. AIRSPD WAS NOT QUESTIONED BY ATC.