What was found
WHILE STARTING ENGINE #1 NO FUEL FLOW WITHIN 30 SEC. ON 2ND START ATTEMPT FUEL FLOW CAME UP NORMALLY AND DROPPED TO0 IN A FEW SECONDS. ON 3RD ATTEMPT USING IGN L ENGINE STARTED NORMALLY. STARTS 1+2 WERE ON IGN R. GROUNDED - YES. REMOVED & REPLACED IGNITER PLUG REF B737-800 AMM 74-21-02-400-801 INITIATED REMOVAL OF R/H EXCITER BOX & FOUND R/H EXCITER POWER SUPPLY CABLE TO HAVE A BROKEN INSULATOR. ON THE #1 ENGINE, REMOVED AND REPLACED MW0302 HARNESS REF AMM 71-51-03/401. REPLACED EXCITER BOX BOX REF AMM 74-11-01-400-801.