Passes all tests in the shop manual including micro switch diode test. Wiring continuity passes everywhere. Latest greatest 'D' ECU (coil). New plug (have tried several). Carb and solenoid are used OEM replacements from another saw.
Harness is new. No MDG available for further analysis. (The area dealer's unit went belly up -- imagine that.) Have read everything in the SM related to the ignition, but haven't seen whether or not a bad solenoid would create a condition where the coil would not provide spark. Have also not found a workaround spark test for the ECU anywhere in the absence of the MDG unit. Don't want to risk jumping around the solenoid/micro switch and maybe damaging the ECU somehow.
Would be grateful for any experienced input or enlightenment.
Thanks.
Harness is new. No MDG available for further analysis. (The area dealer's unit went belly up -- imagine that.) Have read everything in the SM related to the ignition, but haven't seen whether or not a bad solenoid would create a condition where the coil would not provide spark. Have also not found a workaround spark test for the ECU anywhere in the absence of the MDG unit. Don't want to risk jumping around the solenoid/micro switch and maybe damaging the ECU somehow.
Would be grateful for any experienced input or enlightenment.
Thanks.