General Troubleshooting Chart - McFarlane Aviation Products

INDICATORCHANGES WHENTAPPEDNO INDICATION ATRUN-UPINDICATOR WORKSON BENCH, BUT NOTIN FLIGHTLead chafed and groundingintermittentlyFriction in movement or old stylepot needs exercising or replacing.EGT Indicator begins at 1200°F.Note: All engines may not reach1200°F at run-up power whileleaned.CHT needs adequate time forwarm up, meter out of calibration,or meter or probe inoperative.Check probe and lead resistance.If okay, there may be excessiveresistance or friction in meter orpot in poor condition.Insulate from airframeCall ALCOR to repair or replaceCheck operation while in flightTest systemCall ALCOR to repair or replace