AFTER HIS ENG QUITS ON ROLLOUT A C210T PLT TAXIES HIS ACFT AFTER ENG RESTART ON TXWY WITHOUT INSURING THAT HE IS ON FREQ WITH GND CTLR AT COS.

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ENG QUIT DURING ROLLOUT FROM LNDG ON RWY 17R. COASTED AIRPLANE TO STOP CLR OF RWY ON A2 AND CALLED GND ADVISING OF STALLED ENG AND DESIRE TO TAXI FROM A2 TO FBO. GND TOLD ME TO TAXI TO RAMP AFTER I GOT THE ENG STARTED. I SWITCHED AVIONICS MAIN OFF; AND SO COULD NOT MONITOR GND. AFTER GETTING ENG STARTED; I TAXIED TO RAMP (ACFT NEXT TO ME GESTURED ME FORWARD -- I SUPPOSE HE HAD BEEN MONITORING GND). PROB -- I THINK I SHOULD HAVE QUERIED GND CTL AGAIN; EVEN THOUGH HE'D CLRED ME TO TAXI AFTER START. I BELIEVE I SHOULD NOT HAVE PROCEEDED WITHOUT TALKING AGAIN TO GND; OR THAT I SHOULD AT LEAST HAVE CALLED AND LET HIM KNOW I HAD ENG STARTED AND WAS PROCEEDING IN ACCORDANCE WITH HIS CLRNC. I DON'T JUDGE THIS TO BE A 'PROB;' BUT MORE OF AN EVENT THAT MAKES ME THINK ABOUT COMS AND AMBIGUITY. VERIFICATION WOULD HAVE MADE THE SIT MORE SAFE AT VIRTUALLY NO COST. AT THE TIME; I FELT A LITTLE PRESSURE TO GET MOVING (I HAD BEEN ASKED TO SPD THROUGH THE APCH) AND I THINK I LET THAT PRESSURE ENCOURAGE THE CUTTING OF A CORNER THAT MADE ME UNCOMFORTABLE. CORRECTIVE ACTION -- NONE NEEDED AT THE TIME; I DON'T THINK; BUT IN FUTURE I THINK I'LL MONITOR GND ON HANDHELD; AND/OR GET CONFIRMATION WHEN IN DOUBT AFTER MY RADIOS ARE BACK 'UP.'