2004 Skidoo ZX Series Service Manual, Page 98Get this manual
Section 03 TROUBLESHOOTING Subsection 04 (ELECTRICAL SYSTEM)
SYMPTOM
RER (ROTAX ELECTRONIC REVERSE) DOES NOT WORK
CONDITION
TESTINSPECTION
NORMAL USE 1Check idle speedaWrong idle speedAdjust according to specification (refer to TECHNICAL DATA)2Check spark plugaFaulty spark plugReplace3Check engine compressionaToo low engine compression; engine stalls when pushing RER buttonRebuilt the engine4Check drive belt heightaWrong belt heightAdjust according to specification (refer to DRIVE BELT)5Check carburetor synchronization and air screw adjustmentaWrong adjustmentAdjust according to specification (refer to TECHNICAL DATA) and read carburetor subsection6Check switch electrical connectionsaBad electrical connections or damaged wiresClean or replace7Check MPEMaFaulty MPEMReplace